chore: merge origin/main into feat/issue-162-korrespondenz-redesign

Resolved conflicts:
- messages/de|en|es.json: kept all keys from both sides
- DateInput.svelte: kept HEAD API (onchange, not oninput/...rest) to match
  CorrespondenzFilterControls caller; incorporated main's isCalendarValid helper

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -28,6 +28,10 @@ jobs:
         run: npm ci
         working-directory: frontend
 
+      - name: Compile Paraglide i18n
+        run: npx @inlang/paraglide-js compile --project ./project.inlang --outdir ./src/lib/paraglide
+        working-directory: frontend
+
       - name: Lint
         run: npm run lint
         working-directory: frontend

backend/src/main/java/org/raddatz/familienarchiv/controller/AuthE2EController.java

@@ -10,6 +10,8 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
+import io.swagger.v3.oas.annotations.Operation;
+
 import lombok.RequiredArgsConstructor;
 
 /**
@@ -24,6 +26,9 @@ public class AuthE2EController {
 
     private final PasswordResetTokenRepository tokenRepository;
 
+    // Hidden from the OpenAPI spec — this endpoint must never appear in the generated api.ts
+    // even when the e2e profile is active alongside the dev profile during spec generation.
+    @Operation(hidden = true)
     @GetMapping("/reset-token-for-test")
     public ResponseEntity<String> getResetTokenForTest(@RequestParam String email) {
         return tokenRepository.findLatestActiveTokenByEmail(email, LocalDateTime.now())

backend/src/main/java/org/raddatz/familienarchiv/controller/DocumentController.java

@@ -212,7 +212,7 @@ public class DocumentController {
     @GetMapping("/conversation")
     public List<Document> getConversation(
             @RequestParam UUID senderId,
-            @RequestParam UUID receiverId,
+            @RequestParam(required = false) UUID receiverId,
             @RequestParam(required = false) LocalDate from,
             @RequestParam(required = false) LocalDate to,
             @RequestParam(defaultValue = "DESC") String dir) {

backend/src/main/java/org/raddatz/familienarchiv/controller/UserController.java

@@ -61,6 +61,7 @@ public class UserController {
     }
 
     @GetMapping("users/{id}")
+    @RequirePermission(Permission.ADMIN_USER)
     public ResponseEntity<AppUser> getUser(@PathVariable UUID id) {
         AppUser user = userService.getById(id);
         user.setPassword(null);

backend/src/main/java/org/raddatz/familienarchiv/repository/DocumentRepository.java

@@ -60,11 +60,9 @@ public interface DocumentRepository extends JpaRepository<Document, UUID>, JpaSp
     @Query("SELECT DISTINCT d FROM Document d " +
             "JOIN d.receivers r " +
             "WHERE " +
-            // Logik: (Sender A an Empfänger B) ODER (Sender B an Empfänger A)
             "((d.sender.id = :person1 AND r.id = :person2) " +
             " OR " +
             " (d.sender.id = :person2 AND r.id = :person1)) " +
-            // UND das Datum stimmt
             "AND d.documentDate BETWEEN :from AND :to")
     List<Document> findConversation(
             @Param("person1") UUID person1,
@@ -73,4 +71,14 @@ public interface DocumentRepository extends JpaRepository<Document, UUID>, JpaSp
             @Param("to") LocalDate to,
             Sort sort);
 
+    @Query("SELECT DISTINCT d FROM Document d " +
+            "LEFT JOIN d.receivers r " +
+            "WHERE (d.sender.id = :personId OR r.id = :personId) " +
+            "AND d.documentDate BETWEEN :from AND :to")
+    List<Document> findSinglePersonCorrespondence(
+            @Param("personId") UUID personId,
+            @Param("from") LocalDate from,
+            @Param("to") LocalDate to,
+            Sort sort);
+
 }

backend/src/main/java/org/raddatz/familienarchiv/service/DocumentService.java

@@ -328,6 +328,9 @@ public class DocumentService {
     public List<Document> getConversationFiltered(UUID senderId, UUID receiverId, LocalDate from, LocalDate to, Sort sort) {
         LocalDate dateFrom = (from != null) ? from : LocalDate.parse("0000-01-01");
         LocalDate dateTo = (to != null) ? to : LocalDate.now();
+        if (receiverId == null) {
+            return documentRepository.findSinglePersonCorrespondence(senderId, dateFrom, dateTo, sort);
+        }
         return documentRepository.findConversation(senderId, receiverId, dateFrom, dateTo, sort);
     }
 

backend/src/main/java/org/raddatz/familienarchiv/service/PersonService.java

@@ -24,10 +24,13 @@ public class PersonService {
     private final PersonRepository personRepository;
 
     public List<PersonSummaryDTO> findAll(String q) {
-        if (q != null && !q.isBlank()) {
-            return personRepository.searchWithDocumentCount(q);
+        if (q == null) {
+            return personRepository.findAllWithDocumentCount();
         }
-        return personRepository.findAllWithDocumentCount();
+        if (q.isBlank()) {
+            return List.of();
+        }
+        return personRepository.searchWithDocumentCount(q.trim());
     }
 
     public Person getById(UUID id) {

backend/src/test/java/org/raddatz/familienarchiv/controller/UserControllerTest.java

@@ -50,4 +50,29 @@ class UserControllerTest {
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.username").value("anna"));
     }
+
+    // ─── GET /api/users/{id} ──────────────────────────────────────────────────
+
+    @Test
+    @WithMockUser(username = "reader")
+    void getUser_returns403_whenCallerLacksAdminUserPermission() throws Exception {
+        UUID id = UUID.randomUUID();
+        AppUser target = AppUser.builder().id(id).username("target").build();
+        when(userService.getById(id)).thenReturn(target);
+
+        mockMvc.perform(get("/api/users/" + id))
+                .andExpect(status().isForbidden());
+    }
+
+    @Test
+    @WithMockUser(username = "admin", authorities = {"ADMIN_USER"})
+    void getUser_returns200_whenCallerHasAdminUserPermission() throws Exception {
+        UUID id = UUID.randomUUID();
+        AppUser user = AppUser.builder().id(id).username("target").build();
+        when(userService.getById(id)).thenReturn(user);
+
+        mockMvc.perform(get("/api/users/" + id))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.username").value("target"));
+    }
 }

backend/src/test/java/org/raddatz/familienarchiv/repository/DocumentRepositoryTest.java

@@ -15,8 +15,11 @@ import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
 
+import java.time.LocalDate;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Optional;
+import java.util.Set;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -189,4 +192,65 @@ class DocumentRepositoryTest {
         assertThat(result.getTotalElements()).isEqualTo(5);
         assertThat(result.getContent()).allMatch(d -> !d.isMetadataComplete());
     }
+
+    // ─── findSinglePersonCorrespondence — DISTINCT / multi-receiver safety ────
+
+    @Test
+    void findSinglePersonCorrespondence_returnsExactlyOneResult_whenDocumentHasThreeReceiversAndOneMatchesPersonId() {
+        Person sender = personRepository.save(Person.builder()
+                .firstName("Hans").lastName("Müller").build());
+        Person receiver1 = personRepository.save(Person.builder()
+                .firstName("Anna").lastName("Schmidt").build());
+        Person receiver2 = personRepository.save(Person.builder()
+                .firstName("Bertha").lastName("Wagner").build());
+        Person receiver3 = personRepository.save(Person.builder()
+                .firstName("Clara").lastName("Koch").build());
+
+        // Document addressed to all three receivers
+        Document doc = documentRepository.save(Document.builder()
+                .title("Rundschreiben")
+                .originalFilename("rundschreiben.pdf")
+                .status(DocumentStatus.UPLOADED)
+                .sender(sender)
+                .receivers(new HashSet<>(Set.of(receiver1, receiver2, receiver3)))
+                .documentDate(LocalDate.of(1950, 6, 1))
+                .build());
+
+        Sort sort = Sort.by(Sort.Direction.DESC, "documentDate");
+        LocalDate from = LocalDate.of(1900, 1, 1);
+        LocalDate to = LocalDate.of(2000, 1, 1);
+
+        // Query for receiver1 — the DISTINCT must collapse the 3 JOIN rows into 1 result
+        List<Document> results = documentRepository.findSinglePersonCorrespondence(
+                receiver1.getId(), from, to, sort);
+
+        assertThat(results).hasSize(1);
+        assertThat(results.get(0).getId()).isEqualTo(doc.getId());
+    }
+
+    @Test
+    void findSinglePersonCorrespondence_includesDocumentsWherePerson_isSender() {
+        Person sender = personRepository.save(Person.builder()
+                .firstName("Hans").lastName("Müller").build());
+        Person receiver = personRepository.save(Person.builder()
+                .firstName("Anna").lastName("Schmidt").build());
+
+        documentRepository.save(Document.builder()
+                .title("Brief als Absender")
+                .originalFilename("brief_absender.pdf")
+                .status(DocumentStatus.UPLOADED)
+                .sender(sender)
+                .receivers(new HashSet<>(Set.of(receiver)))
+                .documentDate(LocalDate.of(1950, 6, 1))
+                .build());
+
+        Sort sort = Sort.by(Sort.Direction.DESC, "documentDate");
+        LocalDate from = LocalDate.of(1900, 1, 1);
+        LocalDate to = LocalDate.of(2000, 1, 1);
+
+        List<Document> results = documentRepository.findSinglePersonCorrespondence(
+                sender.getId(), from, to, sort);
+
+        assertThat(results).hasSize(1);
+    }
 }

backend/src/test/java/org/raddatz/familienarchiv/service/DocumentServiceTest.java

@@ -1244,4 +1244,33 @@ class DocumentServiceTest {
         assertThat(captor.getValue().getSort())
                 .isEqualTo(Sort.by(Sort.Direction.DESC, "updatedAt"));
     }
+
+    // ─── getConversationFiltered (single-person mode) ─────────────────────────
+
+    @Test
+    void getConversationFiltered_callsSinglePersonQuery_whenReceiverIdIsNull() {
+        UUID personId = UUID.randomUUID();
+        Sort sort = Sort.by(Sort.Direction.DESC, "documentDate");
+        when(documentRepository.findSinglePersonCorrespondence(eq(personId), any(), any(), eq(sort)))
+                .thenReturn(List.of());
+
+        documentService.getConversationFiltered(personId, null, null, null, sort);
+
+        verify(documentRepository).findSinglePersonCorrespondence(eq(personId), any(), any(), eq(sort));
+        verify(documentRepository, never()).findConversation(any(), any(), any(), any(), any());
+    }
+
+    @Test
+    void getConversationFiltered_callsBilateralQuery_whenReceiverIdIsSet() {
+        UUID senderId = UUID.randomUUID();
+        UUID receiverId = UUID.randomUUID();
+        Sort sort = Sort.by(Sort.Direction.DESC, "documentDate");
+        when(documentRepository.findConversation(eq(senderId), eq(receiverId), any(), any(), eq(sort)))
+                .thenReturn(List.of());
+
+        documentService.getConversationFiltered(senderId, receiverId, null, null, sort);
+
+        verify(documentRepository).findConversation(eq(senderId), eq(receiverId), any(), any(), eq(sort));
+        verify(documentRepository, never()).findSinglePersonCorrespondence(any(), any(), any(), any());
+    }
 }

backend/src/test/java/org/raddatz/familienarchiv/service/PersonServiceTest.java

@@ -62,12 +62,9 @@ class PersonServiceTest {
     }
 
     @Test
-    void findAll_returnsAll_whenQueryIsBlank() {
-        List<PersonSummaryDTO> expected = List.of();
-        when(personRepository.findAllWithDocumentCount()).thenReturn(expected);
-
-        assertThat(personService.findAll("   ")).isEqualTo(expected);
-        verify(personRepository).findAllWithDocumentCount();
+    void findAll_returnsEmpty_whenQueryIsWhitespaceOnly() {
+        assertThat(personService.findAll("   ")).isEmpty();
+        verify(personRepository, never()).findAllWithDocumentCount();
         verify(personRepository, never()).searchWithDocumentCount(any());
     }
 

frontend/e2e/korrespondenz.spec.ts

@@ -0,0 +1,127 @@
+import { test, expect } from '@playwright/test';
+import AxeBuilder from '@axe-core/playwright';
+
+function buildAxe(page: Parameters<typeof AxeBuilder>[0]['page']) {
+	return new AxeBuilder({ page }).withTags(['wcag2a', 'wcag2aa']);
+}
+
+test.describe('Korrespondenz – empty state', () => {
+	test('shows the search heading when no person is selected', async ({ page }) => {
+		await page.goto('/korrespondenz');
+		await expect(page.getByText(/Korrespondenz durchsuchen/i)).toBeVisible();
+		const a11y = await buildAxe(page).analyze();
+		expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
+		await page.screenshot({ path: 'test-results/e2e/korrespondenz-empty.png' });
+	});
+
+	test('nav link goes to /korrespondenz', async ({ page }) => {
+		await page.goto('/');
+		// Click the nav link (desktop text or mobile icon)
+		const navLink = page.getByRole('link', { name: /Korrespondenz/i }).first();
+		await navLink.click();
+		await expect(page).toHaveURL(/\/korrespondenz/);
+	});
+});
+
+test.describe('Korrespondenz – single-person mode', () => {
+	test('shows hint bar and documents when navigated with senderId', async ({ page }) => {
+		// Get a real person ID from the persons list
+		await page.goto('/persons');
+		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
+		await firstPersonLink.click();
+		await page.waitForURL(/\/persons\/.+/);
+
+		// Extract the person ID from the URL
+		const personId = page.url().split('/persons/')[1].split('?')[0];
+
+		// Navigate to korrespondenz in single-person mode
+		await page.goto(`/korrespondenz?senderId=${personId}`);
+
+		// Hint bar should be visible
+		await expect(page.getByText(/Alle Briefe von/i)).toBeVisible();
+
+		// Filter controls should be active (not dimmed)
+		const filterStrip = page.locator('[aria-disabled="false"]').first();
+		await expect(filterStrip).toBeAttached();
+
+		const a11y = await buildAxe(page).analyze();
+		expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
+		await page.screenshot({ path: 'test-results/e2e/korrespondenz-single-person.png' });
+	});
+
+	test('sort toggle changes URL direction param', async ({ page }) => {
+		await page.goto('/persons');
+		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
+		await firstPersonLink.click();
+		await page.waitForURL(/\/persons\/.+/);
+		const personId = page.url().split('/persons/')[1].split('?')[0];
+
+		await page.goto(`/korrespondenz?senderId=${personId}&dir=DESC`);
+		await page.getByTestId('conv-sort-btn').click();
+
+		await expect(page).toHaveURL(/dir=ASC/);
+		await page.screenshot({ path: 'test-results/e2e/korrespondenz-sort-asc.png' });
+	});
+});
+
+test.describe('Korrespondenz – bilateral mode', () => {
+	test('shows asymmetry bar when both persons have shared documents', async ({ page }) => {
+		// Navigate to a person then follow a co-correspondent suggestion if available
+		await page.goto('/persons');
+		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
+		await firstPersonLink.click();
+		await page.waitForURL(/\/persons\/.+/);
+		const senderId = page.url().split('/persons/')[1].split('?')[0];
+
+		// Try to find a co-correspondent link from the person detail page
+		const corrLink = page
+			.locator('a[href*="/korrespondenz?senderId="][href*="receiverId="]')
+			.first();
+		if (await corrLink.isVisible({ timeout: 2000 }).catch(() => false)) {
+			await corrLink.click();
+			await page.waitForURL(/\/korrespondenz\?.*receiverId=/);
+
+			// Hint bar should NOT be shown in bilateral mode
+			await expect(page.getByText(/Alle Briefe von/i)).not.toBeVisible();
+
+			const a11y = await buildAxe(page).analyze();
+			expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
+			await page.screenshot({ path: 'test-results/e2e/korrespondenz-bilateral.png' });
+		} else {
+			// E2E seed must include bilateral correspondents — a missing link is a test failure.
+			throw new Error(
+				`No bilateral correspondent links found for person ${senderId}. Ensure the E2E seed contains at least one bilateral correspondence pair.`
+			);
+		}
+	});
+
+	test('swap button swaps sender and receiver in URL', async ({ page }) => {
+		await page.goto('/persons');
+		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
+		await firstPersonLink.click();
+		await page.waitForURL(/\/persons\/.+/);
+		const senderId = page.url().split('/persons/')[1].split('?')[0];
+
+		const corrLink = page
+			.locator('a[href*="/korrespondenz?senderId="][href*="receiverId="]')
+			.first();
+		if (await corrLink.isVisible({ timeout: 2000 }).catch(() => false)) {
+			const href = await corrLink.getAttribute('href');
+			await corrLink.click();
+			await page.waitForURL(/\/korrespondenz\?.*receiverId=/);
+
+			// Extract original receiverId from the href
+			const url = new URL(href!, 'http://x');
+			const originalReceiverId = url.searchParams.get('receiverId')!;
+
+			// Click swap
+			await page.getByTestId('conv-swap-btn').click();
+
+			// After swap the former receiver is now senderId
+			await expect(page).toHaveURL(new RegExp(`senderId=${originalReceiverId}`));
+			await page.screenshot({ path: 'test-results/e2e/korrespondenz-swapped.png' });
+		} else {
+			test.skip(true, `No bilateral correspondent links found for person ${senderId}`);
+		}
+	});
+});

frontend/messages/de.json

@@ -16,7 +16,7 @@
 	"error_internal_error": "Ein unerwarteter Fehler ist aufgetreten.",
 	"nav_documents": "Dokumente",
 	"nav_persons": "Personen",
-	"nav_conversations": "Konversationen",
+	"nav_conversations": "Korrespondenz",
 	"nav_admin": "Admin",
 	"nav_logout": "Abmelden",
 	"btn_save": "Speichern",
@@ -122,22 +122,39 @@
 	"person_co_correspondents_heading": "Häufige Korrespondenten",
 	"person_correspondents_hint": "klicken für Konversation",
 	"person_show_more": "+ {count} weitere anzeigen",
-	"conv_heading": "Konversationen",
-	"conv_subtitle": "Verfolgen Sie den Schriftverkehr zwischen zwei Personen chronologisch.",
+	"conv_heading": "Korrespondenz",
+	"conv_subtitle": "Briefwechsel einer Person durchsuchen — mit oder ohne Korrespondent.",
 	"conv_label_person_a": "Person A (Absender)",
-	"conv_label_person_b": "Person B (Empfänger)",
+	"conv_label_person_b": "Korrespondent",
 	"conv_label_from": "Zeitraum von",
 	"conv_label_to": "Zeitraum bis",
 	"conv_sort_label": "Sortierung:",
 	"conv_sort_newest": "Neueste zuerst",
 	"conv_sort_oldest": "Älteste zuerst",
-	"conv_empty_heading": "Wählen Sie zwei Personen aus",
-	"conv_empty_text": "Die Korrespondenz wird hier angezeigt.",
+	"conv_empty_heading": "Korrespondenz durchsuchen",
+	"conv_empty_text": "Wähle eine Person aus dem Archiv um deren Briefe zu sehen — mit oder ohne Korrespondent.",
 	"conv_no_results_heading": "Keine Dokumente gefunden.",
 	"conv_no_results_text": "Versuchen Sie, den Zeitraum anzupassen.",
 	"conv_swap_btn": "Personen tauschen",
 	"conv_summary": "{count} Dokumente · {yearFrom}–{yearTo}",
 	"conv_new_doc_link": "Neues Dokument in dieser Korrespondenz",
+	"conv_label_correspondent_optional": "Korrespondent",
+	"conv_hint_single_person": "Alle Briefe von {name} — wähle einen Korrespondenten oben um einzugrenzen",
+	"conv_hint_single_person_filtered": "Alle Briefe von {name} · {from}–{to} · {sortLabel}",
+	"conv_strip_period": "Zeitraum",
+	"conv_strip_from_placeholder": "Von…",
+	"conv_strip_to_placeholder": "Bis…",
+	"conv_strip_all_correspondents": "Alle Korrespondenten",
+	"conv_strip_sort_newest": "Neueste",
+	"conv_strip_sort_oldest": "Älteste",
+	"conv_suggestions_heading": "Häufigste Korrespondenten",
+	"conv_suggestions_all_label": "Alle Korrespondenten von {name}",
+	"conv_letters_count": "{count} Briefe",
+	"conv_empty_search_placeholder": "Person suchen…",
+	"conv_empty_recent_label": "Zuletzt geöffnet",
+	"conv_asym_sent": "{count} von {name} →",
+	"conv_asym_received": "{count} von {name} ←",
+	"conv_no_party": "—",
 	"admin_heading": "Admin Dashboard",
 	"admin_tab_users": "Benutzer",
 	"admin_tab_groups": "Gruppen",
@@ -155,6 +172,14 @@
 	"admin_multiselect_hint_full": "Strg+Klick für Mehrfachauswahl",
 	"admin_section_tags": "Schlagworte",
 	"admin_tags_warning": "Warnung: Umbenennen oder Löschen wirkt sich auf alle verknüpften Dokumente aus.",
+	"admin_tags_list_title": "Alle Schlagworte",
+	"admin_tags_empty": "Keine Schlagworte vorhanden.",
+	"admin_tags_select_prompt": "W\u00e4hle ein Schlagwort aus der Liste.",
+	"admin_tag_edit_heading": "Schlagwort: {name}",
+	"admin_tag_updated": "Schlagwort umbenannt.",
+	"admin_unsaved_warning": "Du hast ungespeicherte Änderungen – speichere oder verwerfe, bevor du wechselst.",
+	"admin_btn_collapse_list": "Liste einklappen",
+	"admin_btn_expand_list": "Liste ausklappen",
 	"admin_btn_edit_tag_label": "Schlagwort bearbeiten",
 	"admin_tag_delete_confirm": "Wirklich löschen? Das Schlagwort wird aus allen Dokumenten entfernt.",
 	"admin_btn_delete_tag_label": "Schlagwort löschen",
@@ -167,6 +192,28 @@
 	"admin_group_name_placeholder": "Gruppenname (z.B. Editoren)",
 	"admin_user_delete_confirm": "Benutzer {username} wirklich löschen?",
 	"admin_btn_new_user": "Neuer Benutzer",
+	"admin_users_list_title": "Alle Benutzer",
+	"admin_users_search_placeholder": "Benutzer suchen\u2026",
+	"admin_users_empty": "Keine Benutzer vorhanden.",
+	"admin_users_select_prompt": "W\u00e4hle einen Benutzer aus der Liste.",
+	"admin_btn_new_group": "Neue Gruppe",
+	"admin_groups_list_title": "Alle Gruppen",
+	"admin_groups_empty": "Keine Gruppen vorhanden.",
+	"admin_groups_select_prompt": "W\u00e4hle eine Gruppe aus der Liste.",
+	"admin_groups_permission_count": "{count} Berechtigungen",
+	"admin_group_new_heading": "Neue Gruppe anlegen",
+	"admin_group_edit_heading": "Gruppe: {name}",
+	"admin_group_updated": "Gruppe gespeichert.",
+	"admin_group_created": "Gruppe erstellt.",
+	"admin_groups_section_standard": "Standard",
+	"admin_groups_section_administrative": "Administrativ",
+	"admin_perm_read_all": "Nur lesen",
+	"admin_perm_annotate_all": "Lesen & Annotieren",
+	"admin_perm_write_all": "Lesen & Schreiben",
+	"admin_perm_admin": "Vollzugriff (Admin)",
+	"admin_perm_admin_user": "Benutzer verwalten",
+	"admin_perm_admin_tag": "Schlagworte verwalten",
+	"admin_perm_admin_permission": "Berechtigungen verwalten",
 	"admin_user_new_heading": "Neuen Benutzer anlegen",
 	"admin_user_edit_heading": "Benutzer bearbeiten: {username}",
 	"admin_user_created": "Benutzer wurde erstellt.",
@@ -250,6 +297,14 @@
 	"admin_system_backfill_hashes_description": "Berechnet den SHA-256-Hash für alle bereits hochgeladenen Dokumente, die noch keinen Hash haben. Dadurch werden Annotationen korrekt mit ihrer Dateiversion verknüpft und wieder angezeigt.",
 	"admin_system_backfill_hashes_btn": "Datei-Hashes berechnen",
 	"admin_system_backfill_hashes_success": "{count} Dokumente wurden aktualisiert.",
+	"admin_system_import_heading": "Massenimport",
+	"admin_system_import_description": "Importiert Dokumente und Metadaten aus der Importdatei im /import-Verzeichnis.",
+	"admin_system_import_btn_start": "Import starten",
+	"admin_system_import_btn_retry": "Erneut starten",
+	"admin_system_import_status_idle": "Kein Import gestartet.",
+	"admin_system_import_status_running": "Import läuft…",
+	"admin_system_import_status_done": "Import abgeschlossen – {count} Dokumente verarbeitet.",
+	"admin_system_import_status_failed": "Fehler: {message}",
 	"comp_expandable_show_more": "Mehr anzeigen",
 	"comp_expandable_show_less": "Weniger anzeigen",
 	"error_comment_not_found": "Der Kommentar wurde nicht gefunden.",

frontend/messages/en.json

@@ -16,7 +16,7 @@
 	"error_internal_error": "An unexpected error occurred.",
 	"nav_documents": "Documents",
 	"nav_persons": "Persons",
-	"nav_conversations": "Conversations",
+	"nav_conversations": "Correspondence",
 	"nav_admin": "Admin",
 	"nav_logout": "Sign out",
 	"btn_save": "Save",
@@ -122,22 +122,39 @@
 	"person_co_correspondents_heading": "Frequent correspondents",
 	"person_correspondents_hint": "click to view conversation",
 	"person_show_more": "+ {count} more",
-	"conv_heading": "Conversations",
-	"conv_subtitle": "Follow the correspondence between two persons chronologically.",
+	"conv_heading": "Correspondence",
+	"conv_subtitle": "Browse a person's letters — with or without a correspondent.",
 	"conv_label_person_a": "Person A (Sender)",
-	"conv_label_person_b": "Person B (Recipient)",
+	"conv_label_person_b": "Correspondent",
 	"conv_label_from": "Period from",
 	"conv_label_to": "Period to",
 	"conv_sort_label": "Sort:",
 	"conv_sort_newest": "Newest first",
 	"conv_sort_oldest": "Oldest first",
-	"conv_empty_heading": "Select two persons",
-	"conv_empty_text": "The correspondence will be shown here.",
+	"conv_empty_heading": "Browse correspondence",
+	"conv_empty_text": "Choose a person from the archive to see their letters — with or without a correspondent.",
 	"conv_no_results_heading": "No documents found.",
 	"conv_no_results_text": "Try adjusting the time period.",
 	"conv_swap_btn": "Swap persons",
 	"conv_summary": "{count} documents · {yearFrom}–{yearTo}",
 	"conv_new_doc_link": "New document in this correspondence",
+	"conv_label_correspondent_optional": "Correspondent",
+	"conv_hint_single_person": "All letters from {name} — choose a correspondent above to narrow down",
+	"conv_hint_single_person_filtered": "All letters from {name} · {from}–{to} · {sortLabel}",
+	"conv_strip_period": "Period",
+	"conv_strip_from_placeholder": "From…",
+	"conv_strip_to_placeholder": "To…",
+	"conv_strip_all_correspondents": "All correspondents",
+	"conv_strip_sort_newest": "Newest",
+	"conv_strip_sort_oldest": "Oldest",
+	"conv_suggestions_heading": "Top correspondents",
+	"conv_suggestions_all_label": "All correspondents of {name}",
+	"conv_letters_count": "{count} letters",
+	"conv_empty_search_placeholder": "Search person…",
+	"conv_empty_recent_label": "Recently opened",
+	"conv_asym_sent": "{count} from {name} →",
+	"conv_asym_received": "{count} from {name} ←",
+	"conv_no_party": "—",
 	"admin_heading": "Admin Dashboard",
 	"admin_tab_users": "Users",
 	"admin_tab_groups": "Groups",
@@ -155,6 +172,14 @@
 	"admin_multiselect_hint_full": "Ctrl+Click for multiple selection",
 	"admin_section_tags": "Tags",
 	"admin_tags_warning": "Warning: Renaming or deleting affects all linked documents.",
+	"admin_tags_list_title": "All Tags",
+	"admin_tags_empty": "No tags found.",
+	"admin_tags_select_prompt": "Select a tag from the list.",
+	"admin_tag_edit_heading": "Tag: {name}",
+	"admin_tag_updated": "Tag renamed.",
+	"admin_unsaved_warning": "You have unsaved changes — save or discard before switching.",
+	"admin_btn_collapse_list": "Collapse list",
+	"admin_btn_expand_list": "Expand list",
 	"admin_btn_edit_tag_label": "Edit tag",
 	"admin_tag_delete_confirm": "Really delete? The tag will be removed from all documents.",
 	"admin_btn_delete_tag_label": "Delete tag",
@@ -167,6 +192,28 @@
 	"admin_group_name_placeholder": "Group name (e.g. Editors)",
 	"admin_user_delete_confirm": "Really delete user {username}?",
 	"admin_btn_new_user": "New User",
+	"admin_users_list_title": "All Users",
+	"admin_users_search_placeholder": "Search users\u2026",
+	"admin_users_empty": "No users found.",
+	"admin_users_select_prompt": "Select a user from the list.",
+	"admin_btn_new_group": "New Group",
+	"admin_groups_list_title": "All Groups",
+	"admin_groups_empty": "No groups found.",
+	"admin_groups_select_prompt": "Select a group from the list.",
+	"admin_groups_permission_count": "{count} permissions",
+	"admin_group_new_heading": "Create new group",
+	"admin_group_edit_heading": "Group: {name}",
+	"admin_group_updated": "Group saved.",
+	"admin_group_created": "Group created.",
+	"admin_groups_section_standard": "Standard",
+	"admin_groups_section_administrative": "Administrative",
+	"admin_perm_read_all": "Read only",
+	"admin_perm_annotate_all": "Read & Annotate",
+	"admin_perm_write_all": "Read & Write",
+	"admin_perm_admin": "Full access (Admin)",
+	"admin_perm_admin_user": "Manage users",
+	"admin_perm_admin_tag": "Manage tags",
+	"admin_perm_admin_permission": "Manage permissions",
 	"admin_user_new_heading": "Create new user",
 	"admin_user_edit_heading": "Edit user: {username}",
 	"admin_user_created": "User has been created.",
@@ -250,6 +297,14 @@
 	"admin_system_backfill_hashes_description": "Computes the SHA-256 hash for all previously uploaded documents that do not have one yet. This ensures annotations are correctly linked to their file version and shown again.",
 	"admin_system_backfill_hashes_btn": "Compute file hashes",
 	"admin_system_backfill_hashes_success": "{count} documents were updated.",
+	"admin_system_import_heading": "Mass import",
+	"admin_system_import_description": "Imports documents and metadata from the spreadsheet file in the /import directory.",
+	"admin_system_import_btn_start": "Start import",
+	"admin_system_import_btn_retry": "Start again",
+	"admin_system_import_status_idle": "No import started.",
+	"admin_system_import_status_running": "Import running…",
+	"admin_system_import_status_done": "Import complete – {count} documents processed.",
+	"admin_system_import_status_failed": "Error: {message}",
 	"comp_expandable_show_more": "Show more",
 	"comp_expandable_show_less": "Show less",
 	"error_comment_not_found": "The comment could not be found.",

frontend/messages/es.json

@@ -16,7 +16,7 @@
 	"error_internal_error": "Se ha producido un error inesperado.",
 	"nav_documents": "Documentos",
 	"nav_persons": "Personas",
-	"nav_conversations": "Conversaciones",
+	"nav_conversations": "Correspondencia",
 	"nav_admin": "Admin",
 	"nav_logout": "Cerrar sesión",
 	"btn_save": "Guardar",
@@ -122,22 +122,39 @@
 	"person_co_correspondents_heading": "Corresponsales frecuentes",
 	"person_correspondents_hint": "clic para ver conversación",
 	"person_show_more": "+ {count} más",
-	"conv_heading": "Conversaciones",
-	"conv_subtitle": "Siga la correspondencia entre dos personas cronológicamente.",
+	"conv_heading": "Correspondencia",
+	"conv_subtitle": "Explore las cartas de una persona — con o sin corresponsal.",
 	"conv_label_person_a": "Persona A (Remitente)",
-	"conv_label_person_b": "Persona B (Destinatario)",
+	"conv_label_person_b": "Corresponsal",
 	"conv_label_from": "Período desde",
 	"conv_label_to": "Período hasta",
 	"conv_sort_label": "Ordenar:",
 	"conv_sort_newest": "Más reciente primero",
 	"conv_sort_oldest": "Más antiguo primero",
-	"conv_empty_heading": "Seleccione dos personas",
-	"conv_empty_text": "La correspondencia se mostrará aquí.",
+	"conv_empty_heading": "Explorar correspondencia",
+	"conv_empty_text": "Elige una persona del archivo para ver sus cartas — con o sin corresponsal.",
 	"conv_no_results_heading": "No se encontraron documentos.",
 	"conv_no_results_text": "Intente ajustar el período de tiempo.",
 	"conv_swap_btn": "Intercambiar personas",
 	"conv_summary": "{count} documentos · {yearFrom}–{yearTo}",
 	"conv_new_doc_link": "Nuevo documento en esta correspondencia",
+	"conv_label_correspondent_optional": "Corresponsal",
+	"conv_hint_single_person": "Todas las cartas de {name} — elige un corresponsal arriba para filtrar",
+	"conv_hint_single_person_filtered": "Todas las cartas de {name} · {from}–{to} · {sortLabel}",
+	"conv_strip_period": "Período",
+	"conv_strip_from_placeholder": "Desde…",
+	"conv_strip_to_placeholder": "Hasta…",
+	"conv_strip_all_correspondents": "Todos los corresponsales",
+	"conv_strip_sort_newest": "Más reciente",
+	"conv_strip_sort_oldest": "Más antiguo",
+	"conv_suggestions_heading": "Corresponsales frecuentes",
+	"conv_suggestions_all_label": "Todos los corresponsales de {name}",
+	"conv_letters_count": "{count} cartas",
+	"conv_empty_search_placeholder": "Buscar persona…",
+	"conv_empty_recent_label": "Recientemente abiertos",
+	"conv_asym_sent": "{count} de {name} →",
+	"conv_asym_received": "{count} de {name} ←",
+	"conv_no_party": "—",
 	"admin_heading": "Panel de administración",
 	"admin_tab_users": "Usuarios",
 	"admin_tab_groups": "Grupos",
@@ -155,6 +172,14 @@
 	"admin_multiselect_hint_full": "Ctrl+Clic para selección múltiple",
 	"admin_section_tags": "Etiquetas",
 	"admin_tags_warning": "Advertencia: Renombrar o eliminar afecta a todos los documentos vinculados.",
+	"admin_tags_list_title": "Todas las etiquetas",
+	"admin_tags_empty": "No hay etiquetas.",
+	"admin_tags_select_prompt": "Selecciona una etiqueta de la lista.",
+	"admin_tag_edit_heading": "Etiqueta: {name}",
+	"admin_tag_updated": "Etiqueta renombrada.",
+	"admin_unsaved_warning": "Tienes cambios sin guardar — guarda o descarta antes de cambiar.",
+	"admin_btn_collapse_list": "Contraer lista",
+	"admin_btn_expand_list": "Expandir lista",
 	"admin_btn_edit_tag_label": "Editar etiqueta",
 	"admin_tag_delete_confirm": "¿Realmente eliminar? La etiqueta se eliminará de todos los documentos.",
 	"admin_btn_delete_tag_label": "Eliminar etiqueta",
@@ -167,6 +192,28 @@
 	"admin_group_name_placeholder": "Nombre del grupo (p.ej. Editores)",
 	"admin_user_delete_confirm": "¿Realmente eliminar al usuario {username}?",
 	"admin_btn_new_user": "Nuevo usuario",
+	"admin_users_list_title": "Todos los usuarios",
+	"admin_users_search_placeholder": "Buscar usuarios\u2026",
+	"admin_users_empty": "No hay usuarios.",
+	"admin_users_select_prompt": "Selecciona un usuario de la lista.",
+	"admin_btn_new_group": "Nuevo grupo",
+	"admin_groups_list_title": "Todos los grupos",
+	"admin_groups_empty": "No hay grupos.",
+	"admin_groups_select_prompt": "Selecciona un grupo de la lista.",
+	"admin_groups_permission_count": "{count} permisos",
+	"admin_group_new_heading": "Crear nuevo grupo",
+	"admin_group_edit_heading": "Grupo: {name}",
+	"admin_group_updated": "Grupo guardado.",
+	"admin_group_created": "Grupo creado.",
+	"admin_groups_section_standard": "Est\u00e1ndar",
+	"admin_groups_section_administrative": "Administrativo",
+	"admin_perm_read_all": "Solo lectura",
+	"admin_perm_annotate_all": "Leer y anotar",
+	"admin_perm_write_all": "Leer y escribir",
+	"admin_perm_admin": "Acceso completo (Admin)",
+	"admin_perm_admin_user": "Gestionar usuarios",
+	"admin_perm_admin_tag": "Gestionar etiquetas",
+	"admin_perm_admin_permission": "Gestionar permisos",
 	"admin_user_new_heading": "Crear nuevo usuario",
 	"admin_user_edit_heading": "Editar usuario: {username}",
 	"admin_user_created": "Usuario creado.",
@@ -250,6 +297,14 @@
 	"admin_system_backfill_hashes_description": "Calcula el hash SHA-256 para todos los documentos ya subidos que aún no tienen uno. Así las anotaciones se vinculan correctamente a su versión del archivo y vuelven a mostrarse.",
 	"admin_system_backfill_hashes_btn": "Calcular hashes de archivo",
 	"admin_system_backfill_hashes_success": "{count} documentos fueron actualizados.",
+	"admin_system_import_heading": "Importación masiva",
+	"admin_system_import_description": "Importa documentos y metadatos desde el archivo en el directorio /import.",
+	"admin_system_import_btn_start": "Iniciar importación",
+	"admin_system_import_btn_retry": "Iniciar de nuevo",
+	"admin_system_import_status_idle": "No hay importación iniciada.",
+	"admin_system_import_status_running": "Importación en curso…",
+	"admin_system_import_status_done": "Importación completada – {count} documentos procesados.",
+	"admin_system_import_status_failed": "Error: {message}",
 	"comp_expandable_show_more": "Mostrar más",
 	"comp_expandable_show_less": "Mostrar menos",
 	"error_comment_not_found": "El comentario no pudo encontrarse.",

frontend/src/app.d.ts

@@ -12,6 +12,7 @@ declare global {
 			email?: string;
 			contact?: string;
 			groups: {
+				id: string;
 				name: string;
 				permissions: string[];
 			}[];

frontend/src/lib/components/DateInput.svelte

@@ -1,31 +1,28 @@
 <script lang="ts">
-import { isoToGerman, handleGermanDateInput } from '$lib/utils/date.js';
-import * as m from '$lib/paraglide/messages.js';
+import { isoToGerman, handleGermanDateInput, germanToIso } from '$lib/utils/date';
+import { m } from '$lib/paraglide/messages.js';
 
 interface Props {
 	value?: string;
 	errorMessage?: string | null;
-	class?: string;
-	id?: string;
 	name?: string;
+	id?: string;
 	placeholder?: string;
-	oninput?: () => void;
-	[key: string]: unknown;
+	class?: string;
+	onchange?: () => void;
 }
 
 let {
 	value = $bindable(''),
 	errorMessage = $bindable<string | null>(null),
-	class: extraClass,
-	id,
 	name,
-	placeholder = m.form_placeholder_date(),
-	oninput: onInputCallback,
-	...rest
+	id,
+	placeholder,
+	class: className = '',
+	onchange
 }: Props = $props();
 
-// ─── Display state ────────────────────────────────────────────────────────
-let display = $state(isoToGerman(value));
+let display = $state(isoToGerman(value ?? ''));
 
 // ─── Validation helper ────────────────────────────────────────────────────
 function isCalendarValid(iso: string): boolean {
@@ -38,20 +35,32 @@ function isCalendarValid(iso: string): boolean {
 
 // ─── Input handler ────────────────────────────────────────────────────────
 function handleInput(e: Event) {
-	const { display: formatted, iso } = handleGermanDateInput(e);
-	display = formatted;
+	const result = handleGermanDateInput(e);
+	display = result.display;
 
-	if (formatted === '') {
+	if (result.display === '') {
 		value = '';
 		errorMessage = null;
-	} else if (iso && isCalendarValid(iso)) {
-		value = iso;
-		errorMessage = null;
-	} else {
+		onchange?.();
+		return;
+	}
+
+	if (result.display.length < 10) {
 		value = '';
 		errorMessage = m.form_date_error();
+		return;
 	}
-	onInputCallback?.();
+
+	const iso = germanToIso(result.display);
+	if (!iso || !isCalendarValid(iso)) {
+		value = '';
+		errorMessage = m.form_date_error();
+		return;
+	}
+
+	value = iso;
+	errorMessage = null;
+	onchange?.();
 }
 </script>
 
@@ -60,11 +69,10 @@ function handleInput(e: Event) {
 	inputmode="numeric"
 	maxlength="10"
 	id={id}
-	placeholder={placeholder}
-	class={extraClass}
 	value={display}
+	placeholder={placeholder ?? m.form_placeholder_date()}
 	oninput={handleInput}
-	{...rest}
+	class={className}
 />
 {#if name}
 	<input type="hidden" name={name} value={value} />

frontend/src/lib/components/DateInput.svelte.spec.ts

@@ -0,0 +1,210 @@
+import { describe, expect, it, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import DateInput from './DateInput.svelte';
+
+afterEach(() => cleanup());
+
+// ─── Rendering ────────────────────────────────────────────────────────────────
+
+describe('DateInput – rendering', () => {
+	it('renders a text input with inputmode=numeric and maxlength=10', async () => {
+		render(DateInput, {});
+		const input = page.getByRole('textbox');
+		await expect.element(input).toBeInTheDocument();
+		await expect.element(input).toHaveAttribute('inputmode', 'numeric');
+		await expect.element(input).toHaveAttribute('maxlength', '10');
+	});
+
+	it('has default placeholder from paraglide', async () => {
+		render(DateInput, {});
+		const input = page.getByRole('textbox');
+		await expect.element(input).toHaveAttribute('placeholder', 'TT.MM.JJJJ');
+	});
+
+	it('accepts a custom placeholder', async () => {
+		render(DateInput, { placeholder: 'Geburtsdatum' });
+		const input = page.getByRole('textbox');
+		await expect.element(input).toHaveAttribute('placeholder', 'Geburtsdatum');
+	});
+
+	it('passes id prop to the input', async () => {
+		render(DateInput, { id: 'my-date' });
+		const input = page.getByRole('textbox');
+		await expect.element(input).toHaveAttribute('id', 'my-date');
+	});
+});
+
+// ─── Init from value ──────────────────────────────────────────────────────────
+
+describe('DateInput – init from value', () => {
+	it('displays ISO value in German format on mount', async () => {
+		render(DateInput, { value: '2024-12-20' });
+		const input = page.getByRole('textbox');
+		await expect.element(input).toHaveValue('20.12.2024');
+	});
+
+	it('starts empty and error-free when no value is given', async () => {
+		let errorMessage: string | null = null;
+		render(DateInput, {
+			get errorMessage() {
+				return errorMessage;
+			},
+			set errorMessage(v) {
+				errorMessage = v;
+			}
+		});
+		const input = page.getByRole('textbox');
+		await expect.element(input).toHaveValue('');
+		expect(errorMessage).toBeNull();
+	});
+});
+
+// ─── Typing valid date ────────────────────────────────────────────────────────
+
+describe('DateInput – typing a valid date', () => {
+	it('auto-formats to DD.MM.YYYY and updates value to ISO', async () => {
+		let value = '';
+		let errorMessage: string | null = null;
+		render(DateInput, {
+			get value() {
+				return value;
+			},
+			set value(v) {
+				value = v;
+			},
+			get errorMessage() {
+				return errorMessage;
+			},
+			set errorMessage(v) {
+				errorMessage = v;
+			}
+		});
+		const input = page.getByRole('textbox');
+		await input.fill('20122024');
+		await expect.element(input).toHaveValue('20.12.2024');
+		expect(value).toBe('2024-12-20');
+		expect(errorMessage).toBeNull();
+	});
+});
+
+// ─── Typing invalid month ─────────────────────────────────────────────────────
+
+describe('DateInput – typing a date with invalid month', () => {
+	it('sets errorMessage and clears value when month > 12', async () => {
+		let value = '';
+		let errorMessage: string | null = null;
+		render(DateInput, {
+			get value() {
+				return value;
+			},
+			set value(v) {
+				value = v;
+			},
+			get errorMessage() {
+				return errorMessage;
+			},
+			set errorMessage(v) {
+				errorMessage = v;
+			}
+		});
+		const input = page.getByRole('textbox');
+		await input.fill('22222222');
+		await expect.element(input).toHaveValue('22.22.2222');
+		expect(value).toBe('');
+		expect(errorMessage).not.toBeNull();
+	});
+});
+
+// ─── Typing partial date ──────────────────────────────────────────────────────
+
+describe('DateInput – typing a partial date', () => {
+	it('sets errorMessage and clears value when date is incomplete', async () => {
+		let value = '';
+		let errorMessage: string | null = null;
+		render(DateInput, {
+			get value() {
+				return value;
+			},
+			set value(v) {
+				value = v;
+			},
+			get errorMessage() {
+				return errorMessage;
+			},
+			set errorMessage(v) {
+				errorMessage = v;
+			}
+		});
+		const input = page.getByRole('textbox');
+		await input.fill('2212');
+		await expect.element(input).toHaveValue('22.12');
+		expect(value).toBe('');
+		expect(errorMessage).not.toBeNull();
+	});
+});
+
+// ─── Clearing date ────────────────────────────────────────────────────────────
+
+describe('DateInput – clearing the date', () => {
+	it('resets value and errorMessage to null when cleared', async () => {
+		let value = '';
+		let errorMessage: string | null = null;
+		render(DateInput, {
+			get value() {
+				return value;
+			},
+			set value(v) {
+				value = v;
+			},
+			get errorMessage() {
+				return errorMessage;
+			},
+			set errorMessage(v) {
+				errorMessage = v;
+			}
+		});
+		const input = page.getByRole('textbox');
+		// Type a valid date first
+		await input.fill('20122024');
+		expect(value).toBe('2024-12-20');
+		// Now clear
+		await input.fill('');
+		expect(value).toBe('');
+		expect(errorMessage).toBeNull();
+	});
+
+	it('fires onchange when the field is cleared', async () => {
+		let called = 0;
+		render(DateInput, { value: '2024-12-20', onchange: () => called++ });
+		const input = page.getByRole('textbox');
+		await input.fill('');
+		expect(called).toBeGreaterThan(0);
+	});
+});
+
+// ─── Hidden input ─────────────────────────────────────────────────────────────
+
+describe('DateInput – hidden input for form submission', () => {
+	it('renders a hidden input with the given name when name prop is set', async () => {
+		render(DateInput, { name: 'documentDate' });
+		const hidden = document.querySelector('input[type="hidden"][name="documentDate"]');
+		expect(hidden).not.toBeNull();
+	});
+
+	it('does not render a hidden input when name prop is absent', async () => {
+		render(DateInput, {});
+		const hidden = document.querySelector('input[type="hidden"]');
+		expect(hidden).toBeNull();
+	});
+
+	it('hidden input value reflects the ISO value', async () => {
+		render(DateInput, { name: 'documentDate', value: '' });
+		const input = page.getByRole('textbox');
+		await input.fill('20122024');
+		const hidden = document.querySelector<HTMLInputElement>(
+			'input[type="hidden"][name="documentDate"]'
+		);
+		await expect.poll(() => hidden?.value).toBe('2024-12-20');
+	});
+});

frontend/src/lib/components/PanelMetadata.svelte

@@ -175,7 +175,7 @@ let { doc }: { doc: Doc } = $props();
 
 							{#if doc.sender}
 								<a
-									href="/conversations?senderId={doc.sender.id}&receiverId={receiver.id}"
+									href="/korrespondenz?senderId={doc.sender.id}&receiverId={receiver.id}"
 									class="text-ink-3 transition hover:text-accent"
 									title={m.doc_conversation_title()}
 								>

frontend/src/lib/components/PersonTypeahead.svelte

@@ -10,8 +10,11 @@ interface Props {
 	value?: string;
 	initialName?: string;
 	suggestedName?: string;
+	placeholder?: string;
+	compact?: boolean;
 	restrictToCorrespondentsOf?: string;
 	onchange?: (value: string) => void;
+	onfocused?: () => void;
 }
 
 let {
@@ -20,12 +23,23 @@ let {
 	value = $bindable(''),
 	initialName = '',
 	suggestedName = '',
+	placeholder,
+	compact = false,
 	restrictToCorrespondentsOf,
-	onchange
+	onchange,
+	onfocused
 }: Props = $props();
 
+// searchTerm must be both prop-derived AND locally writable (user typing), so $state +
+// $effect is the correct pattern here — writable $derived is read-only and won't work.
+// eslint-disable-next-line svelte/prefer-writable-derived
 let searchTerm = $state(initialName);
 
+// Sync display text when the selected person changes externally (e.g. swap, navigation).
+$effect(() => {
+	searchTerm = initialName;
+});
+
 $effect(() => {
 	const suggested = suggestedName;
 	if (suggested && !untrack(() => value)) {
@@ -79,6 +93,7 @@ function handleInput() {
 }
 
 function handleFocus() {
+	onfocused?.();
 	showDropdown = true;
 	if (restrictToCorrespondentsOf) {
 		const personId = untrack(() => restrictToCorrespondentsOf)!;
@@ -120,7 +135,13 @@ function clickOutside(node: HTMLElement) {
 </script>
 
 <div class="relative" use:clickOutside>
-	<label for={name} class="block text-sm font-medium text-ink-2">{label}</label>
+	<label
+		for={name}
+		class={compact
+			? 'block text-xs font-bold tracking-wide text-ink-3 uppercase'
+			: 'block text-sm font-medium text-ink-2'}
+		>{label}</label
+	>
 
 	<input type="hidden" name={name} bind:value={value} />
 
@@ -131,8 +152,10 @@ function clickOutside(node: HTMLElement) {
 		bind:value={searchTerm}
 		oninput={handleInput}
 		onfocus={handleFocus}
-		placeholder={m.comp_typeahead_placeholder()}
-		class="mt-1 block w-full rounded-md border border-line p-2 shadow-sm focus:border-accent focus:ring-accent"
+		placeholder={placeholder ?? m.comp_typeahead_placeholder()}
+		class={compact
+			? 'mt-1 block h-9 w-full rounded border border-line bg-surface px-2 text-sm text-ink placeholder:text-ink-3 focus:border-primary focus:outline-none'
+			: 'mt-1 block w-full rounded-md border border-line bg-surface p-2 text-ink shadow-sm placeholder:text-ink-3 focus:border-accent focus:ring-accent'}
 	/>
 
 	{#if showDropdown && (results.length > 0 || loading)}

frontend/src/lib/generated/api.ts

@@ -724,6 +724,8 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    // "/api/auth/reset-token-for-test" removed — @Operation(hidden=true) on AuthE2EController.
+    // Regenerate with `npm run generate:api` after the next backend build to keep in sync.
     "/api/admin/import-status": {
         parameters: {
             query?: never;
@@ -1030,8 +1032,6 @@ export interface components {
             /** Format: int32 */
             totalPages?: number;
             pageable?: components["schemas"]["PageableObject"];
-            first?: boolean;
-            last?: boolean;
             /** Format: int32 */
             size?: number;
             content?: components["schemas"]["NotificationDTO"][];
@@ -1040,14 +1040,16 @@ export interface components {
             sort?: components["schemas"]["SortObject"];
             /** Format: int32 */
             numberOfElements?: number;
+            first?: boolean;
+            last?: boolean;
             empty?: boolean;
         };
         PageableObject: {
-            paged?: boolean;
             /** Format: int32 */
             pageNumber?: number;
             /** Format: int32 */
             pageSize?: number;
+            paged?: boolean;
             /** Format: int64 */
             offset?: number;
             sort?: components["schemas"]["SortObject"];
@@ -2223,7 +2225,9 @@ export interface operations {
             query?: {
                 page?: number;
                 size?: number;
+                /** @description Filter by notification type */
                 type?: "REPLY" | "MENTION";
+                /** @description Filter by read status */
                 read?: boolean;
             };
             header?: never;
@@ -2474,7 +2478,7 @@ export interface operations {
         parameters: {
             query: {
                 senderId: string;
-                receiverId: string;
+                receiverId?: string;
                 from?: string;
                 to?: string;
                 dir?: string;
@@ -2496,6 +2500,7 @@ export interface operations {
             };
         };
     };
+    // getResetTokenForTest removed — @Operation(hidden=true) on AuthE2EController.
     importStatus: {
         parameters: {
             query?: never;

frontend/src/lib/utils/date.spec.ts

@@ -0,0 +1,109 @@
+import { describe, expect, it } from 'vitest';
+import { formatGermanDateInput, isoToGerman, germanToIso } from './date';
+
+// ─── isoToGerman ─────────────────────────────────────────────────────────────
+
+describe('isoToGerman', () => {
+	it('converts a valid ISO date to DD.MM.YYYY', () => {
+		expect(isoToGerman('2024-12-20')).toBe('20.12.2024');
+	});
+
+	it('returns empty string for empty input', () => {
+		expect(isoToGerman('')).toBe('');
+	});
+
+	it('returns empty string for invalid format', () => {
+		expect(isoToGerman('not-a-date')).toBe('');
+	});
+});
+
+// ─── germanToIso ─────────────────────────────────────────────────────────────
+
+describe('germanToIso', () => {
+	it('converts DD.MM.YYYY to ISO', () => {
+		expect(germanToIso('20.12.2024')).toBe('2024-12-20');
+	});
+
+	it('returns empty string for partial input', () => {
+		expect(germanToIso('20.12')).toBe('');
+	});
+
+	it('returns empty string for empty input', () => {
+		expect(germanToIso('')).toBe('');
+	});
+});
+
+// ─── formatGermanDateInput ────────────────────────────────────────────────────
+
+describe('formatGermanDateInput – digit stream (no dots typed)', () => {
+	it('leaves 1–2 digits as-is', () => {
+		expect(formatGermanDateInput('2')).toBe('2');
+		expect(formatGermanDateInput('20')).toBe('20');
+	});
+
+	it('auto-inserts dot after 2 digits for 3–4 digit input', () => {
+		expect(formatGermanDateInput('201')).toBe('20.1');
+		expect(formatGermanDateInput('2012')).toBe('20.12');
+	});
+
+	it('auto-inserts two dots for 5–8 digit input', () => {
+		expect(formatGermanDateInput('20121')).toBe('20.12.1');
+		expect(formatGermanDateInput('20122024')).toBe('20.12.2024');
+	});
+
+	it('ignores digits beyond 8', () => {
+		expect(formatGermanDateInput('201220249')).toBe('20.12.2024');
+	});
+});
+
+describe('formatGermanDateInput – manual dot entry with padding', () => {
+	it('pads single-digit day to 2 digits when dot is typed after it', () => {
+		expect(formatGermanDateInput('3.')).toBe('03.');
+	});
+
+	it('does not pad a 2-digit day', () => {
+		expect(formatGermanDateInput('03.')).toBe('03.');
+		expect(formatGermanDateInput('20.')).toBe('20.');
+	});
+
+	it('pads single-digit month to 2 digits when dot is typed after it', () => {
+		expect(formatGermanDateInput('03.3.')).toBe('03.03.');
+	});
+
+	it('does not pad a 2-digit month', () => {
+		expect(formatGermanDateInput('03.12.')).toBe('03.12.');
+	});
+
+	it('pads both day and month in a fully typed date', () => {
+		expect(formatGermanDateInput('3.3.2012')).toBe('03.03.2012');
+	});
+
+	it('pads only day when month is already 2 digits', () => {
+		expect(formatGermanDateInput('3.12.2024')).toBe('03.12.2024');
+	});
+
+	it('pads only month when day is already 2 digits', () => {
+		expect(formatGermanDateInput('20.3.2024')).toBe('20.03.2024');
+	});
+
+	it('handles a complete date entered with manual dots and no padding needed', () => {
+		expect(formatGermanDateInput('20.12.2024')).toBe('20.12.2024');
+	});
+
+	it('overflows excess day digits into month when dot follows', () => {
+		expect(formatGermanDateInput('123.')).toBe('12.3');
+	});
+
+	it('caps year digits at 4', () => {
+		expect(formatGermanDateInput('03.03.20249')).toBe('03.03.2024');
+	});
+
+	it('overflows excess month digits into year (digit stream then continue typing)', () => {
+		// User typed digits → auto-dot gave "20.12", then types "2" → raw becomes "20.122"
+		expect(formatGermanDateInput('20.122')).toBe('20.12.2');
+	});
+
+	it('continues building year after overflow', () => {
+		expect(formatGermanDateInput('20.12.2024')).toBe('20.12.2024');
+	});
+});

frontend/src/routes/AppNav.svelte

@@ -60,9 +60,9 @@ function handleOverlayKeydown(event: KeyboardEvent) {
 		</a>
 
 		<a
-			href="/conversations"
+			href="/korrespondenz"
 			class="inline-flex items-center px-3 py-1.5 font-sans text-xs font-bold tracking-widest uppercase transition-colors
-                   {page.url.pathname.startsWith('/conversations')
+                   {page.url.pathname.startsWith('/korrespondenz')
                     ? 'rounded bg-nav-active text-ink'
                     : 'rounded text-ink-2 hover:bg-muted hover:text-ink'}"
 		>
@@ -161,9 +161,9 @@ function handleOverlayKeydown(event: KeyboardEvent) {
 				</a>
 
 				<a
-					href="/conversations"
+					href="/korrespondenz"
 					class="block flex min-h-[44px] w-full items-center px-4 py-3 font-sans text-sm font-bold tracking-widest uppercase transition-colors
-                           {page.url.pathname.startsWith('/conversations')
+                           {page.url.pathname.startsWith('/korrespondenz')
                             ? 'bg-nav-active text-ink'
                             : 'text-ink-2 hover:bg-muted hover:text-ink'}"
 				>

frontend/src/routes/admin/+layout.server.ts

@@ -0,0 +1,57 @@
+import { error } from '@sveltejs/kit';
+import { createApiClient } from '$lib/api.server';
+import { getErrorMessage } from '$lib/errors';
+import type { components } from '$lib/generated/api';
+
+type UserGroup = components['schemas']['UserGroup'];
+
+function hasPerm(user: { groups?: UserGroup[] } | undefined, perm: string): boolean {
+	return user?.groups?.some((g) => g.permissions.includes(perm)) ?? false;
+}
+
+function hasAnyAdminPerm(user: { groups?: UserGroup[] } | undefined): boolean {
+	return (
+		hasPerm(user, 'ADMIN') ||
+		hasPerm(user, 'ADMIN_USER') ||
+		hasPerm(user, 'ADMIN_TAG') ||
+		hasPerm(user, 'ADMIN_PERMISSION')
+	);
+}
+
+export async function load({ fetch, locals }) {
+	const user = locals.user;
+	if (!hasAnyAdminPerm(user)) throw error(403, getErrorMessage('FORBIDDEN'));
+
+	const api = createApiClient(fetch);
+
+	// TODO: replace with a dedicated /api/admin/stats endpoint that returns counts only,
+	// so the System page does not load full entity lists it does not render.
+	const [usersResult, groupsResult, tagsResult] = await Promise.all([
+		api.GET('/api/users'),
+		api.GET('/api/groups'),
+		api.GET('/api/tags')
+	]);
+
+	if (!usersResult.response.ok) {
+		const code = (usersResult.error as unknown as { code?: string })?.code;
+		throw error(usersResult.response.status, getErrorMessage(code));
+	}
+	if (!groupsResult.response.ok) {
+		const code = (groupsResult.error as unknown as { code?: string })?.code;
+		throw error(groupsResult.response.status, getErrorMessage(code));
+	}
+	if (!tagsResult.response.ok) {
+		const code = (tagsResult.error as unknown as { code?: string })?.code;
+		throw error(tagsResult.response.status, getErrorMessage(code));
+	}
+
+	return {
+		userCount: (usersResult.data ?? []).length,
+		groupCount: (groupsResult.data ?? []).length,
+		tagCount: (tagsResult.data ?? []).length,
+		canManageUsers: hasPerm(user, 'ADMIN_USER'),
+		canManageTags: hasPerm(user, 'ADMIN_TAG'),
+		canManagePermissions: hasPerm(user, 'ADMIN_PERMISSION'),
+		canRunMaintenance: hasPerm(user, 'ADMIN')
+	};
+}

frontend/src/routes/admin/+layout.svelte

@@ -0,0 +1,33 @@
+<script lang="ts">
+import EntityNav from './EntityNav.svelte';
+
+let { data, children } = $props();
+</script>
+
+<svelte:head>
+	<title>Admin · Familienarchiv</title>
+</svelte:head>
+
+<!--
+  -mt-6: cancel the global layout's pt-6 on <main>
+  Height fills from below the global header (64px) to bottom of viewport.
+-->
+<div class="-mt-6 -mb-6 flex overflow-hidden" style="height: calc(100vh - 65px)">
+	<!-- Entity Nav: hidden on mobile, icon strip on tablet, full labels on desktop -->
+	<div class="hidden md:flex">
+		<EntityNav
+			userCount={data.userCount}
+			groupCount={data.groupCount}
+			tagCount={data.tagCount}
+			canManageUsers={data.canManageUsers}
+			canManageTags={data.canManageTags}
+			canManagePermissions={data.canManagePermissions}
+			canRunMaintenance={data.canRunMaintenance}
+		/>
+	</div>
+
+	<!-- Right side: list panel + detail panel (or full-width for system) -->
+	<div class="flex min-w-0 flex-1 overflow-hidden">
+		{@render children()}
+	</div>
+</div>

frontend/src/routes/admin/+page.server.ts

@@ -1,116 +0,0 @@
-import { error, fail } from '@sveltejs/kit';
-import { createApiClient } from '$lib/api.server';
-import { getErrorMessage } from '$lib/errors';
-
-type ApiResult = { response: Response; error?: unknown };
-
-function toActionResult(result: ApiResult) {
-	if (!result.response.ok) {
-		const code = (result.error as { code?: string } | undefined)?.code;
-		return fail(result.response.status, { success: false, message: getErrorMessage(code) });
-	}
-	return { success: true };
-}
-
-export async function load({ fetch, locals }) {
-	const user = locals.user;
-	const hasAdmin = user?.groups?.some((g: { permissions: string[] }) =>
-		g.permissions.includes('ADMIN')
-	);
-	if (!hasAdmin) throw error(403, getErrorMessage('FORBIDDEN'));
-
-	const api = createApiClient(fetch);
-
-	const [usersResult, groupsResult, tagsResult] = await Promise.all([
-		api.GET('/api/users'),
-		api.GET('/api/groups'),
-		api.GET('/api/tags')
-	]);
-
-	return {
-		users: usersResult.data ?? [],
-		groups: groupsResult.data ?? [],
-		tags: tagsResult.data ?? []
-	};
-}
-
-export const actions = {
-	deleteUser: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const id = data.get('id') as string;
-		const api = createApiClient(fetch);
-
-		const result = await api.DELETE('/api/users/{id}', {
-			params: { path: { id } }
-		});
-
-		return toActionResult(result);
-	},
-
-	updateTag: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const id = data.get('id') as string;
-		const api = createApiClient(fetch);
-
-		const result = await api.PUT('/api/tags/{id}', {
-			params: { path: { id } },
-			body: { name: data.get('name') as string }
-		});
-
-		return toActionResult(result);
-	},
-
-	deleteTag: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const id = data.get('id') as string;
-		const api = createApiClient(fetch);
-
-		const result = await api.DELETE('/api/tags/{id}', {
-			params: { path: { id } }
-		});
-
-		return toActionResult(result);
-	},
-
-	createGroup: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const api = createApiClient(fetch);
-
-		const result = await api.POST('/api/groups', {
-			body: {
-				name: data.get('name') as string,
-				permissions: data.getAll('permissions') as string[]
-			}
-		});
-
-		return toActionResult(result);
-	},
-
-	updateGroup: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const id = data.get('id') as string;
-		const api = createApiClient(fetch);
-
-		const result = await api.PATCH('/api/groups/{id}', {
-			params: { path: { id } },
-			body: {
-				name: data.get('name') as string,
-				permissions: data.getAll('permissions') as string[]
-			}
-		});
-
-		return toActionResult(result);
-	},
-
-	deleteGroup: async ({ request, fetch }) => {
-		const data = await request.formData();
-		const id = data.get('id') as string;
-		const api = createApiClient(fetch);
-
-		const result = await api.DELETE('/api/groups/{id}', {
-			params: { path: { id } }
-		});
-
-		return toActionResult(result);
-	}
-};

frontend/src/routes/admin/+page.svelte

@@ -1,78 +1,68 @@
 <script lang="ts">
-import { slide } from 'svelte/transition';
+import { goto } from '$app/navigation';
+import { onMount } from 'svelte';
 import { m } from '$lib/paraglide/messages.js';
-import UsersTab from './UsersTab.svelte';
-import TagsTab from './TagsTab.svelte';
-import GroupsTab from './GroupsTab.svelte';
-import SystemTab from './SystemTab.svelte';
 
-let { data, form } = $props();
+let { data } = $props();
 
-let activeTab = $state('users');
+// On desktop/tablet the layout shell with EntityNav is visible.
+// On mobile this page IS the entity picker — tapping an entity pushes
+// the user to that route so the browser back button returns here.
+onMount(() => {
+	if (window.matchMedia('(min-width: 768px)').matches) {
+		goto('/admin/users', { replaceState: true });
+	}
+});
 </script>
 
 <svelte:head>
 	<title>{m.page_title_admin()}</title>
 </svelte:head>
 
-<div class="mx-auto max-w-7xl px-4 py-8 font-sans sm:px-6 lg:px-8">
-	<div class="mb-8 flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
-		<h1 class="font-serif text-3xl text-ink">{m.admin_heading()}</h1>
-
-		<!-- Tabs -->
-		<div class="grid grid-cols-2 rounded-lg border border-line bg-surface p-1 shadow-sm sm:flex">
-			<button
-				class="rounded-md px-2 py-2 text-sm font-bold tracking-wide uppercase transition sm:px-4 {activeTab ===
-				'users'
-					? 'bg-primary text-primary-fg'
-					: 'text-ink-2 hover:text-ink'}"
-				onclick={() => (activeTab = 'users')}>{m.admin_tab_users()}</button
-			>
-			<button
-				class="rounded-md px-2 py-2 text-sm font-bold tracking-wide uppercase transition sm:px-4 {activeTab ===
-				'groups'
-					? 'bg-primary text-primary-fg'
-					: 'text-ink-2 hover:text-ink'}"
-				onclick={() => (activeTab = 'groups')}>{m.admin_tab_groups()}</button
-			>
-			<button
-				class="rounded-md px-2 py-2 text-sm font-bold tracking-wide uppercase transition sm:px-4 {activeTab ===
-				'tags'
-					? 'bg-primary text-primary-fg'
-					: 'text-ink-2 hover:text-ink'}"
-				onclick={() => (activeTab = 'tags')}>{m.admin_tab_tags()}</button
-			>
-			<button
-				class="rounded-md px-2 py-2 text-sm font-bold tracking-wide uppercase transition sm:px-4 {activeTab ===
-				'system'
-					? 'bg-primary text-primary-fg'
-					: 'text-ink-2 hover:text-ink'}"
-				onclick={() => (activeTab = 'system')}>{m.admin_tab_system()}</button
-			>
-		</div>
+<!-- Mobile entity picker (md+ viewports redirect to /admin/users on mount) -->
+<div class="flex flex-1 flex-col bg-surface">
+	<div class="border-b border-line px-4 py-4">
+		<h1 class="font-sans text-lg font-bold text-ink">{m.admin_heading()}</h1>
 	</div>
 
-	{#if form?.message}
-		<div class="mb-6 rounded border border-accent/50 bg-accent/20 p-4 text-ink">
-			{form.message}
-		</div>
-	{/if}
+	<nav class="divide-y divide-line" aria-label={m.admin_heading()}>
+		{#if data.canManageUsers}
+			<a href="/admin/users" class="flex items-center justify-between px-4 py-4 hover:bg-muted">
+				<div>
+					<div class="font-sans text-sm font-bold text-ink">{m.admin_tab_users()}</div>
+					<div class="mt-0.5 font-sans text-xs text-ink-3">{data.userCount}</div>
+				</div>
+				<span class="text-ink-3">›</span>
+			</a>
+		{/if}
 
-	{#if activeTab === 'users'}
-		<div in:slide>
-			<UsersTab users={data.users} />
-		</div>
-	{:else if activeTab === 'tags'}
-		<div in:slide>
-			<TagsTab tags={data.tags} />
-		</div>
-	{:else if activeTab === 'groups'}
-		<div in:slide>
-			<GroupsTab groups={data.groups} />
-		</div>
-	{:else if activeTab === 'system'}
-		<div in:slide>
-			<SystemTab />
-		</div>
-	{/if}
+		{#if data.canManagePermissions}
+			<a href="/admin/groups" class="flex items-center justify-between px-4 py-4 hover:bg-muted">
+				<div>
+					<div class="font-sans text-sm font-bold text-ink">{m.admin_tab_groups()}</div>
+					<div class="mt-0.5 font-sans text-xs text-ink-3">{data.groupCount}</div>
+				</div>
+				<span class="text-ink-3">›</span>
+			</a>
+		{/if}
+
+		{#if data.canManageTags}
+			<a href="/admin/tags" class="flex items-center justify-between px-4 py-4 hover:bg-muted">
+				<div>
+					<div class="font-sans text-sm font-bold text-ink">{m.admin_tab_tags()}</div>
+					<div class="mt-0.5 font-sans text-xs text-ink-3">{data.tagCount}</div>
+				</div>
+				<span class="text-ink-3">›</span>
+			</a>
+		{/if}
+
+		{#if data.canRunMaintenance}
+			<a href="/admin/system" class="flex items-center justify-between px-4 py-4 hover:bg-muted">
+				<div>
+					<div class="font-sans text-sm font-bold text-ink">{m.admin_tab_system()}</div>
+				</div>
+				<span class="text-ink-3">›</span>
+			</a>
+		{/if}
+	</nav>
 </div>

frontend/src/routes/admin/EntityNav.svelte

@@ -0,0 +1,515 @@
+<script lang="ts">
+import { tick } from 'svelte';
+import { fly } from 'svelte/transition';
+import { page } from '$app/state';
+import { m } from '$lib/paraglide/messages.js';
+
+let {
+	userCount,
+	groupCount,
+	tagCount,
+	canManageUsers,
+	canManageTags,
+	canManagePermissions,
+	canRunMaintenance
+}: {
+	userCount: number;
+	groupCount: number;
+	tagCount: number;
+	canManageUsers: boolean;
+	canManageTags: boolean;
+	canManagePermissions: boolean;
+	canRunMaintenance: boolean;
+} = $props();
+
+const currentPath = $derived(page.url.pathname);
+const isActive = (section: string) => currentPath.startsWith(`/admin/${section}`);
+
+let flyoutOpen = $state(false);
+let flyoutTriggerElement: HTMLButtonElement | null = null;
+
+// All four section buttons open the same flyout that repeats the full nav.
+// This is intentional: on tablet the flyout shows all sections as a wider navigation panel,
+// not a context-specific panel for the clicked section.
+async function openFlyout(event: MouseEvent) {
+	flyoutTriggerElement = event.currentTarget as HTMLButtonElement;
+	flyoutOpen = true;
+	await tick();
+	const firstLink = document.querySelector<HTMLAnchorElement>('[role="dialog"] a');
+	firstLink?.focus();
+}
+
+function closeFlyout() {
+	flyoutOpen = false;
+	flyoutTriggerElement?.focus();
+}
+
+function handleKeydown(event: KeyboardEvent) {
+	if (event.key === 'Escape' && flyoutOpen) {
+		closeFlyout();
+	}
+}
+</script>
+
+<svelte:document onkeydown={handleKeydown} />
+
+<!--
+  Desktop (lg+): 120px with text labels
+  Tablet (md–lg): 48px icon-only strip with flyout panel
+-->
+<nav
+	class="flex flex-shrink-0 flex-col bg-brand-navy md:w-12 lg:w-30"
+	aria-label={m.admin_heading()}
+>
+	<!-- Desktop-only heading -->
+	<div
+		class="hidden px-3 pt-3 pb-1 text-[9px] font-extrabold tracking-widest text-white/30 uppercase lg:block"
+	>
+		{m.admin_heading()}
+	</div>
+
+	{#if canManageUsers}
+		<!-- Tablet trigger button (md only, hidden at lg) -->
+		<button
+			data-flyout-trigger
+			type="button"
+			aria-label={m.admin_tab_users()}
+			title={m.admin_tab_users()}
+			onclick={openFlyout}
+			class="flex min-h-[44px] w-full flex-col items-center justify-center gap-0.5 border-l-[3px] py-3 transition-colors lg:hidden
+				{isActive('users')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('users') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z"
+				/>
+			</svg>
+			<span class="text-[9px] font-bold {isActive('users') ? 'text-white/80' : 'text-white/35'}">
+				{userCount}
+			</span>
+		</button>
+		<!-- Desktop link (lg+) -->
+		<a
+			href="/admin/users"
+			class="hidden flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors lg:flex
+				{isActive('users')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+			aria-current={isActive('users') ? 'page' : undefined}
+			title={m.admin_tab_users()}
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('users') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z"
+				/>
+			</svg>
+			<span class="text-[13px] font-black {isActive('users') ? 'text-white/65' : 'text-white/20'}">
+				{userCount}
+			</span>
+			<span
+				class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+				{isActive('users') ? 'text-white' : 'text-white/55'}"
+			>
+				{m.admin_tab_users()}
+			</span>
+		</a>
+	{/if}
+
+	{#if canManagePermissions}
+		<!-- Tablet trigger button (md only, hidden at lg) -->
+		<button
+			data-flyout-trigger
+			type="button"
+			aria-label={m.admin_tab_groups()}
+			title={m.admin_tab_groups()}
+			onclick={openFlyout}
+			class="flex min-h-[44px] w-full flex-col items-center justify-center gap-0.5 border-l-[3px] py-3 transition-colors lg:hidden
+				{isActive('groups')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('groups') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z"
+				/>
+			</svg>
+			<span class="text-[9px] font-bold {isActive('groups') ? 'text-white/80' : 'text-white/35'}">
+				{groupCount}
+			</span>
+		</button>
+		<!-- Desktop link (lg+) -->
+		<a
+			href="/admin/groups"
+			class="hidden flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors lg:flex
+				{isActive('groups')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+			aria-current={isActive('groups') ? 'page' : undefined}
+			title={m.admin_tab_groups()}
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('groups') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z"
+				/>
+			</svg>
+			<span class="text-[13px] font-black {isActive('groups') ? 'text-white/65' : 'text-white/20'}">
+				{groupCount}
+			</span>
+			<span
+				class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+				{isActive('groups') ? 'text-white' : 'text-white/55'}"
+			>
+				{m.admin_tab_groups()}
+			</span>
+		</a>
+	{/if}
+
+	{#if canManageTags}
+		<!-- Tablet trigger button (md only, hidden at lg) -->
+		<button
+			data-flyout-trigger
+			type="button"
+			aria-label={m.admin_tab_tags()}
+			title={m.admin_tab_tags()}
+			onclick={openFlyout}
+			class="flex min-h-[44px] w-full flex-col items-center justify-center gap-0.5 border-l-[3px] py-3 transition-colors lg:hidden
+				{isActive('tags')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('tags') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M9.568 3H5.25A2.25 2.25 0 003 5.25v4.318c0 .597.237 1.17.659 1.591l9.581 9.581c.699.699 1.78.872 2.607.33a18.095 18.095 0 005.223-5.223c.542-.827.369-1.908-.33-2.607L11.16 3.66A2.25 2.25 0 009.568 3z"
+				/>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M6 6h.008v.008H6V6z" />
+			</svg>
+			<span class="text-[9px] font-bold {isActive('tags') ? 'text-white/80' : 'text-white/35'}">
+				{tagCount}
+			</span>
+		</button>
+		<!-- Desktop link (lg+) -->
+		<a
+			href="/admin/tags"
+			class="hidden flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors lg:flex
+				{isActive('tags')
+				? 'border-brand-mint bg-white/10'
+				: 'border-transparent hover:bg-white/5'}"
+			aria-current={isActive('tags') ? 'page' : undefined}
+			title={m.admin_tab_tags()}
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('tags') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M9.568 3H5.25A2.25 2.25 0 003 5.25v4.318c0 .597.237 1.17.659 1.591l9.581 9.581c.699.699 1.78.872 2.607.33a18.095 18.095 0 005.223-5.223c.542-.827.369-1.908-.33-2.607L11.16 3.66A2.25 2.25 0 009.568 3z"
+				/>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M6 6h.008v.008H6V6z" />
+			</svg>
+			<span class="text-[13px] font-black {isActive('tags') ? 'text-white/65' : 'text-white/20'}">
+				{tagCount}
+			</span>
+			<span
+				class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+				{isActive('tags') ? 'text-white' : 'text-white/55'}"
+			>
+				{m.admin_tab_tags()}
+			</span>
+		</a>
+	{/if}
+
+	<div class="flex-1"></div>
+
+	{#if canRunMaintenance}
+		<!-- Tablet trigger button (md only, hidden at lg) -->
+		<button
+			data-flyout-trigger
+			type="button"
+			aria-label={m.admin_tab_system()}
+			title={m.admin_tab_system()}
+			onclick={openFlyout}
+			class="flex min-h-[44px] w-full flex-col items-center justify-center gap-0.5 border-t border-l-[3px] border-white/10 py-3 transition-colors lg:hidden
+				{isActive('system')
+				? 'border-brand-mint bg-white/10'
+				: 'border-l-transparent hover:bg-white/5'}"
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('system') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.213 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z"
+				/>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+			</svg>
+		</button>
+		<!-- Desktop link (lg+) -->
+		<a
+			href="/admin/system"
+			class="hidden flex-col items-start justify-center gap-0.5 border-t border-l-[3px] border-white/10 px-3.5 py-2.5 transition-colors lg:flex
+				{isActive('system')
+				? 'border-brand-mint bg-white/10'
+				: 'border-l-transparent hover:bg-white/5'}"
+			aria-current={isActive('system') ? 'page' : undefined}
+			title={m.admin_tab_system()}
+		>
+			<svg
+				class="h-5 w-5 flex-shrink-0 {isActive('system') ? 'text-brand-mint' : 'text-white/40'}"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="1.5"
+				aria-hidden="true"
+			>
+				<path
+					stroke-linecap="round"
+					stroke-linejoin="round"
+					d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.213 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z"
+				/>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+			</svg>
+			<span
+				class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+				{isActive('system') ? 'text-white' : 'text-white/55'}"
+			>
+				{m.admin_tab_system()}
+			</span>
+		</a>
+	{/if}
+</nav>
+
+{#if flyoutOpen}
+	<!-- Backdrop -->
+	<div
+		data-flyout-backdrop
+		role="none"
+		class="fixed inset-0 z-40 bg-black/40"
+		onclick={closeFlyout}
+	></div>
+
+	<!-- Flyout panel -->
+	<div
+		role="dialog"
+		aria-modal="true"
+		aria-label={m.admin_heading()}
+		class="fixed top-0 left-12 z-50 flex h-full w-40 flex-col bg-brand-navy shadow-xl"
+		transition:fly={{ x: -160, duration: 180 }}
+	>
+		<!-- Heading -->
+		<div class="px-3 pt-3 pb-1 text-[9px] font-extrabold tracking-widest text-white/30 uppercase">
+			{m.admin_heading()}
+		</div>
+
+		{#if canManageUsers}
+			<a
+				href="/admin/users"
+				onclick={closeFlyout}
+				class="flex flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors
+					{isActive('users')
+					? 'border-brand-mint bg-white/10'
+					: 'border-transparent hover:bg-white/5'}"
+				aria-current={isActive('users') ? 'page' : undefined}
+			>
+				<svg
+					class="h-5 w-5 flex-shrink-0 {isActive('users') ? 'text-brand-mint' : 'text-white/40'}"
+					fill="none"
+					viewBox="0 0 24 24"
+					stroke="currentColor"
+					stroke-width="1.5"
+					aria-hidden="true"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z"
+					/>
+				</svg>
+				<span
+					class="text-[13px] font-black {isActive('users') ? 'text-white/65' : 'text-white/20'}"
+				>
+					{userCount}
+				</span>
+				<span
+					class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+					{isActive('users') ? 'text-white' : 'text-white/55'}"
+				>
+					{m.admin_tab_users()}
+				</span>
+			</a>
+		{/if}
+
+		{#if canManagePermissions}
+			<a
+				href="/admin/groups"
+				onclick={closeFlyout}
+				class="flex flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors
+					{isActive('groups')
+					? 'border-brand-mint bg-white/10'
+					: 'border-transparent hover:bg-white/5'}"
+				aria-current={isActive('groups') ? 'page' : undefined}
+			>
+				<svg
+					class="h-5 w-5 flex-shrink-0 {isActive('groups') ? 'text-brand-mint' : 'text-white/40'}"
+					fill="none"
+					viewBox="0 0 24 24"
+					stroke="currentColor"
+					stroke-width="1.5"
+					aria-hidden="true"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z"
+					/>
+				</svg>
+				<span
+					class="text-[13px] font-black {isActive('groups') ? 'text-white/65' : 'text-white/20'}"
+				>
+					{groupCount}
+				</span>
+				<span
+					class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+					{isActive('groups') ? 'text-white' : 'text-white/55'}"
+				>
+					{m.admin_tab_groups()}
+				</span>
+			</a>
+		{/if}
+
+		{#if canManageTags}
+			<a
+				href="/admin/tags"
+				onclick={closeFlyout}
+				class="flex flex-col items-start justify-center gap-0.5 border-l-[3px] px-3.5 py-2.5 transition-colors
+					{isActive('tags')
+					? 'border-brand-mint bg-white/10'
+					: 'border-transparent hover:bg-white/5'}"
+				aria-current={isActive('tags') ? 'page' : undefined}
+			>
+				<svg
+					class="h-5 w-5 flex-shrink-0 {isActive('tags') ? 'text-brand-mint' : 'text-white/40'}"
+					fill="none"
+					viewBox="0 0 24 24"
+					stroke="currentColor"
+					stroke-width="1.5"
+					aria-hidden="true"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						d="M9.568 3H5.25A2.25 2.25 0 003 5.25v4.318c0 .597.237 1.17.659 1.591l9.581 9.581c.699.699 1.78.872 2.607.33a18.095 18.095 0 005.223-5.223c.542-.827.369-1.908-.33-2.607L11.16 3.66A2.25 2.25 0 009.568 3z"
+					/>
+					<path stroke-linecap="round" stroke-linejoin="round" d="M6 6h.008v.008H6V6z" />
+				</svg>
+				<span class="text-[13px] font-black {isActive('tags') ? 'text-white/65' : 'text-white/20'}">
+					{tagCount}
+				</span>
+				<span
+					class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+					{isActive('tags') ? 'text-white' : 'text-white/55'}"
+				>
+					{m.admin_tab_tags()}
+				</span>
+			</a>
+		{/if}
+
+		<div class="flex-1"></div>
+
+		{#if canRunMaintenance}
+			<a
+				href="/admin/system"
+				onclick={closeFlyout}
+				class="flex flex-col items-start justify-center gap-0.5 border-t border-l-[3px] border-white/10 px-3.5 py-2.5 transition-colors
+					{isActive('system')
+					? 'border-brand-mint bg-white/10'
+					: 'border-l-transparent hover:bg-white/5'}"
+				aria-current={isActive('system') ? 'page' : undefined}
+			>
+				<svg
+					class="h-5 w-5 flex-shrink-0 {isActive('system') ? 'text-brand-mint' : 'text-white/40'}"
+					fill="none"
+					viewBox="0 0 24 24"
+					stroke="currentColor"
+					stroke-width="1.5"
+					aria-hidden="true"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.213 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z"
+					/>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"
+					/>
+				</svg>
+				<span
+					class="text-[9px] font-extrabold tracking-[0.5px] uppercase
+					{isActive('system') ? 'text-white' : 'text-white/55'}"
+				>
+					{m.admin_tab_system()}
+				</span>
+			</a>
+		{/if}
+	</div>
+{/if}

frontend/src/routes/admin/GroupsTab.svelte

@@ -1,221 +0,0 @@
-<script lang="ts">
-import { enhance } from '$app/forms';
-import { m } from '$lib/paraglide/messages.js';
-
-let { groups }: { groups: { id: string; name: string; permissions: string[] }[] } = $props();
-
-const availablePermissions = ['WRITE_ALL', 'ADMIN', 'ADMIN_USER', 'ADMIN_TAG', 'ADMIN_PERMISSION'];
-
-let editingGroupId: string | null = $state(null);
-
-function startEditGroup(id: string) {
-	editingGroupId = id;
-}
-
-function cancelEditGroup() {
-	editingGroupId = null;
-}
-</script>
-
-<div class="overflow-hidden rounded-lg border border-line bg-surface shadow-sm">
-	<div class="flex items-center justify-between border-b border-line-2 p-6">
-		<h2 class="text-lg font-bold text-ink-2">{m.admin_section_groups()}</h2>
-	</div>
-
-	<table class="min-w-full divide-y divide-line">
-		<thead class="bg-muted">
-			<tr>
-				<th class="px-6 py-3 text-left text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_name()}</th
-				>
-				<th class="px-6 py-3 text-left text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_permissions()}</th
-				>
-				<th class="px-6 py-3 text-right text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_actions()}</th
-				>
-			</tr>
-		</thead>
-		<tbody class="divide-y divide-line bg-surface">
-			{#each groups as group (group.id)}
-				<tr class="group/row hover:bg-muted">
-					{#if editingGroupId === group.id}
-						<!-- EDIT MODE -->
-						<td colspan="3" class="px-6 py-4">
-							<form
-								method="POST"
-								action="?/updateGroup"
-								use:enhance={() =>
-									async ({ update }) => {
-										await update();
-										cancelEditGroup();
-									}}
-								class="flex w-full flex-col items-start gap-4 sm:flex-row"
-							>
-								<input type="hidden" name="id" value={group.id} />
-
-								<div class="w-full sm:w-1/3">
-									<input
-										type="text"
-										name="name"
-										value={group.name}
-										class="w-full rounded border-accent text-sm"
-										required
-									/>
-								</div>
-
-								<div class="flex h-full flex-1 flex-wrap items-center gap-4 pt-2">
-									{#each availablePermissions as perm (perm)}
-										<label class="inline-flex items-center text-xs font-bold text-ink-2 uppercase">
-											<input
-												type="checkbox"
-												name="permissions"
-												value={perm}
-												checked={group.permissions.includes(perm)}
-												class="mr-2 rounded border-line text-ink focus:ring-accent"
-											/>
-											{perm.replace('_', ' ')}
-										</label>
-									{/each}
-								</div>
-
-								<div class="flex gap-2 self-start sm:self-center">
-									<button
-										type="submit"
-										aria-label={m.btn_save()}
-										class="p-1 text-green-600 hover:text-green-800"
-									>
-										<svg class="h-6 w-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-											><path
-												stroke-linecap="round"
-												stroke-linejoin="round"
-												stroke-width="2"
-												d="M5 13l4 4L19 7"
-											/></svg
-										>
-									</button>
-									<button
-										type="button"
-										onclick={cancelEditGroup}
-										aria-label={m.btn_cancel()}
-										class="p-1 text-ink-3 hover:text-red-500"
-									>
-										<svg class="h-6 w-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-											><path
-												stroke-linecap="round"
-												stroke-linejoin="round"
-												stroke-width="2"
-												d="M6 18L18 6M6 6l12 12"
-											/></svg
-										>
-									</button>
-								</div>
-							</form>
-						</td>
-					{:else}
-						<!-- VIEW MODE -->
-						<td class="px-6 py-4 text-sm font-bold whitespace-nowrap text-ink">
-							{group.name}
-						</td>
-						<td class="px-6 py-4 text-sm text-ink-2">
-							<div class="flex flex-wrap gap-1">
-								{#each group.permissions as perm (perm)}
-									<span
-										class="rounded-full px-2 py-0.5 text-[10px] font-bold uppercase
-                                        {perm === 'ADMIN'
-											? 'border-red-100 bg-red-50 text-red-700'
-											: 'border-line bg-muted text-ink-2'}"
-									>
-										{perm}
-									</span>
-								{/each}
-							</div>
-						</td>
-						<td class="px-6 py-4 text-right whitespace-nowrap">
-							<div class="flex items-center justify-end gap-3">
-								<button
-									onclick={() => startEditGroup(group.id)}
-									class="text-sm font-bold tracking-wide text-primary uppercase hover:text-ink-2"
-								>
-									{m.btn_edit()}
-								</button>
-
-								<form
-									method="POST"
-									action="?/deleteGroup"
-									use:enhance={({ cancel }) => {
-										if (!confirm(m.admin_group_delete_confirm())) {
-											cancel();
-										}
-										return async ({ update }) => {
-											await update();
-										};
-									}}
-								>
-									<input type="hidden" name="id" value={group.id} />
-									<button
-										class="p-1 text-ink-3 transition-colors hover:text-red-600"
-										title={m.btn_delete()}
-									>
-										<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-											<path
-												stroke-linecap="round"
-												stroke-linejoin="round"
-												stroke-width="2"
-												d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
-											/>
-										</svg>
-									</button>
-								</form>
-							</div>
-						</td>
-					{/if}
-				</tr>
-			{/each}
-		</tbody>
-	</table>
-
-	<!-- CREATE GROUP FORM -->
-	<div class="border-t border-line bg-muted p-6">
-		<h3 class="mb-4 text-xs font-bold tracking-wide text-ink-2 uppercase">
-			{m.admin_section_new_group()}
-		</h3>
-		<form
-			method="POST"
-			action="?/createGroup"
-			use:enhance
-			class="flex flex-col items-start gap-4 md:flex-row md:items-center"
-		>
-			<div class="w-full flex-1">
-				<input
-					type="text"
-					name="name"
-					placeholder={m.admin_group_name_placeholder()}
-					required
-					class="w-full rounded border-line text-sm"
-				/>
-			</div>
-
-			<div class="flex items-center gap-4">
-				{#each availablePermissions as perm (perm)}
-					<label class="inline-flex items-center text-xs font-bold text-ink-2 uppercase">
-						<input
-							type="checkbox"
-							name="permissions"
-							value={perm}
-							class="mr-2 rounded border-line text-ink focus:ring-accent"
-						/>
-						{perm.replace('_', ' ')}
-					</label>
-				{/each}
-			</div>
-
-			<button
-				type="submit"
-				class="w-full rounded bg-primary px-6 py-2 text-sm font-bold text-primary-fg uppercase hover:bg-accent hover:text-ink md:w-auto"
-			>
-				{m.btn_create()}
-			</button>
-		</form>
-	</div>
-</div>

frontend/src/routes/admin/SystemTab.svelte

@@ -1,72 +0,0 @@
-<script lang="ts">
-import { m } from '$lib/paraglide/messages.js';
-
-let backfillResult: number | null = $state(null);
-let backfillLoading = $state(false);
-let backfillHashesResult: number | null = $state(null);
-let backfillHashesLoading = $state(false);
-
-async function backfillVersions() {
-	backfillLoading = true;
-	backfillResult = null;
-	try {
-		const res = await fetch('/api/admin/backfill-versions', { method: 'POST' });
-		if (res.ok) {
-			const data = await res.json();
-			backfillResult = data.count;
-		}
-	} finally {
-		backfillLoading = false;
-	}
-}
-
-async function backfillFileHashes() {
-	backfillHashesLoading = true;
-	backfillHashesResult = null;
-	try {
-		const res = await fetch('/api/admin/backfill-file-hashes', { method: 'POST' });
-		if (res.ok) {
-			const data = await res.json();
-			backfillHashesResult = data.count;
-		}
-	} finally {
-		backfillHashesLoading = false;
-	}
-}
-</script>
-
-<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
-	<h2 class="mb-1 text-lg font-bold text-ink-2">{m.admin_system_backfill_heading()}</h2>
-	<p class="mb-4 text-sm text-ink-2">{m.admin_system_backfill_description()}</p>
-	<button
-		onclick={backfillVersions}
-		disabled={backfillLoading}
-		class="rounded bg-primary px-6 py-2 text-sm font-bold text-primary-fg uppercase transition hover:bg-accent hover:text-ink disabled:cursor-not-allowed disabled:opacity-50"
-	>
-		{backfillLoading ? '…' : m.admin_system_backfill_btn()}
-	</button>
-	{#if backfillResult !== null}
-		<p class="mt-4 text-sm font-medium text-ink">
-			{m.admin_system_backfill_success({ count: backfillResult })}
-		</p>
-	{/if}
-</div>
-
-<div class="mt-4 rounded-sm border border-line bg-surface p-6 shadow-sm">
-	<h2 class="mb-1 text-lg font-bold text-ink-2">
-		{m.admin_system_backfill_hashes_heading()}
-	</h2>
-	<p class="mb-4 text-sm text-ink-2">{m.admin_system_backfill_hashes_description()}</p>
-	<button
-		onclick={backfillFileHashes}
-		disabled={backfillHashesLoading}
-		class="rounded bg-primary px-6 py-2 text-sm font-bold text-primary-fg uppercase transition hover:bg-accent hover:text-ink disabled:cursor-not-allowed disabled:opacity-50"
-	>
-		{backfillHashesLoading ? '…' : m.admin_system_backfill_hashes_btn()}
-	</button>
-	{#if backfillHashesResult !== null}
-		<p class="mt-4 text-sm font-medium text-ink">
-			{m.admin_system_backfill_hashes_success({ count: backfillHashesResult })}
-		</p>
-	{/if}
-</div>

frontend/src/routes/admin/TagsTab.svelte

@@ -1,127 +0,0 @@
-<script lang="ts">
-import { enhance } from '$app/forms';
-import { m } from '$lib/paraglide/messages.js';
-
-let { tags }: { tags: { id: string; name: string }[] } = $props();
-
-let editingTagId: string | null = $state(null);
-let editingTagName = $state('');
-
-function startEditTag(tag: { id: string; name: string }) {
-	editingTagId = tag.id;
-	editingTagName = tag.name;
-}
-
-function cancelEditTag() {
-	editingTagId = null;
-	editingTagName = '';
-}
-</script>
-
-<div class="overflow-hidden rounded-lg border border-line bg-surface shadow-sm">
-	<div class="border-b border-line-2 bg-yellow-50/50 p-6">
-		<h2 class="text-lg font-bold text-ink-2">{m.admin_section_tags()}</h2>
-		<p class="mt-1 text-xs text-yellow-800">
-			{m.admin_tags_warning()}
-		</p>
-	</div>
-
-	<ul class="max-h-[600px] divide-y divide-line-2 overflow-y-auto">
-		{#each tags as tag (tag.id)}
-			<li class="group flex items-center justify-between px-6 py-3 hover:bg-muted">
-				{#if editingTagId === tag.id}
-					<form
-						method="POST"
-						action="?/updateTag"
-						use:enhance={() =>
-							async ({ update }) => {
-								await update();
-								cancelEditTag();
-							}}
-						class="flex flex-1 items-center gap-2"
-					>
-						<input type="hidden" name="id" value={tag.id} />
-						<input
-							type="text"
-							name="name"
-							bind:value={editingTagName}
-							class="flex-1 rounded border-accent px-2 py-1 text-sm ring-1 ring-accent"
-						/>
-						<button aria-label={m.btn_save()} class="text-green-600 hover:text-green-800"
-							><svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-								><path
-									stroke-linecap="round"
-									stroke-linejoin="round"
-									stroke-width="2"
-									d="M5 13l4 4L19 7"
-								/></svg
-							></button
-						>
-						<button
-							type="button"
-							onclick={cancelEditTag}
-							aria-label={m.btn_cancel()}
-							class="text-ink-3 hover:text-ink-2"
-							><svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-								><path
-									stroke-linecap="round"
-									stroke-linejoin="round"
-									stroke-width="2"
-									d="M6 18L18 6M6 6l12 12"
-								/></svg
-							></button
-						>
-					</form>
-				{:else}
-					<span class="rounded bg-muted px-2 py-1 text-sm font-medium text-ink">
-						{tag.name}
-					</span>
-					<div class="flex items-center gap-2 opacity-0 transition-opacity group-hover:opacity-100">
-						<button
-							onclick={() => startEditTag(tag)}
-							aria-label={m.admin_btn_edit_tag_label()}
-							class="p-1 text-ink-3 hover:text-ink"
-						>
-							<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-								><path
-									stroke-linecap="round"
-									stroke-linejoin="round"
-									stroke-width="2"
-									d="M15.232 5.232l3.536 3.536m-2.036-5.036a2.5 2.5 0 113.536 3.536L6.5 21.036H3v-3.572L16.732 3.732z"
-								/></svg
-							>
-						</button>
-						<form
-							method="POST"
-							action="?/deleteTag"
-							use:enhance={({ cancel }) => {
-								if (!confirm(m.admin_tag_delete_confirm())) {
-									cancel();
-								}
-								return async ({ update }) => {
-									await update();
-								};
-							}}
-							class="inline"
-						>
-							<input type="hidden" name="id" value={tag.id} />
-							<button
-								aria-label={m.admin_btn_delete_tag_label()}
-								class="p-1 text-ink-3 hover:text-red-600"
-							>
-								<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"
-									><path
-										stroke-linecap="round"
-										stroke-linejoin="round"
-										stroke-width="2"
-										d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
-									/></svg
-								>
-							</button>
-						</form>
-					</div>
-				{/if}
-			</li>
-		{/each}
-	</ul>
-</div>

frontend/src/routes/admin/UsersTab.svelte

@@ -1,120 +0,0 @@
-<script lang="ts">
-import { enhance } from '$app/forms';
-import { m } from '$lib/paraglide/messages.js';
-
-let {
-	users
-}: {
-	users: {
-		id: string;
-		username: string;
-		firstName?: string;
-		lastName?: string;
-		groups?: { id: string; name: string }[];
-	}[];
-} = $props();
-</script>
-
-<div class="overflow-hidden rounded-lg border border-line bg-surface shadow-sm">
-	<div class="flex items-center justify-between border-b border-line-2 p-6">
-		<h2 class="text-lg font-bold text-ink-2">{m.admin_section_users()}</h2>
-		<a
-			href="/admin/users/new"
-			class="inline-flex items-center gap-1 rounded-sm bg-primary px-4 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
-		>
-			<svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-				<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4" />
-			</svg>
-			{m.admin_btn_new_user()}
-		</a>
-	</div>
-
-	<table class="min-w-full divide-y divide-line">
-		<thead class="bg-muted">
-			<tr>
-				<th class="px-6 py-3 text-left text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_login()}</th
-				>
-				<th class="px-6 py-3 text-left text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_full_name()}</th
-				>
-				<th class="px-6 py-3 text-left text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_groups()}</th
-				>
-				<th class="px-6 py-3 text-right text-xs font-bold tracking-wider text-ink-2 uppercase"
-					>{m.admin_col_actions()}</th
-				>
-			</tr>
-		</thead>
-		<tbody class="divide-y divide-line bg-surface">
-			{#each users as user (user.id)}
-				<tr class="group/row hover:bg-muted">
-					<td class="px-6 py-4 text-sm font-medium whitespace-nowrap text-ink">
-						{user.username}
-					</td>
-					<td class="px-6 py-4 text-sm whitespace-nowrap text-ink-2">
-						{#if user.firstName || user.lastName}
-							{user.firstName ?? ''} {user.lastName ?? ''}
-						{:else}
-							<span class="text-ink-3 italic">–</span>
-						{/if}
-					</td>
-					<td class="px-6 py-4 text-sm text-ink-2">
-						<div class="flex flex-wrap gap-1">
-							{#if user.groups && user.groups.length > 0}
-								{#each user.groups as group (group.id)}
-									<span
-										class="rounded-full border border-blue-100 bg-blue-50 px-2 py-0.5 text-[10px] font-bold text-blue-700 uppercase"
-									>
-										{group.name}
-									</span>
-								{/each}
-							{:else}
-								<span class="text-xs text-ink-3 italic">{m.admin_no_groups()}</span>
-							{/if}
-						</div>
-					</td>
-					<td class="px-6 py-4 text-right whitespace-nowrap">
-						<div class="flex items-center justify-end gap-4">
-							<a
-								href="/admin/users/{user.id}"
-								class="text-sm font-bold tracking-wide text-primary uppercase hover:text-ink-2"
-							>
-								{m.btn_edit()}
-							</a>
-
-							<form
-								method="POST"
-								action="?/deleteUser"
-								use:enhance={({ cancel }) => {
-									if (!confirm(m.admin_user_delete_confirm({ username: user.username }))) {
-										cancel();
-									}
-									return async ({ update }) => {
-										await update();
-									};
-								}}
-								class="flex items-center"
-							>
-								<input type="hidden" name="id" value={user.id} />
-								<button
-									class="p-1 text-ink-3 transition-colors hover:text-red-600"
-									title={m.admin_btn_delete_user_title()}
-								>
-									<svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-										<path
-											stroke-linecap="round"
-											stroke-linejoin="round"
-											stroke-width="2"
-											d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
-										/>
-									</svg>
-								</button>
-							</form>
-						</div>
-					</td>
-				</tr>
-			{/each}
-		</tbody>
-	</table>
-</div>

frontend/src/routes/admin/entity-nav.svelte.spec.ts

@@ -0,0 +1,81 @@
+import { afterEach, describe, it, expect, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import EntityNav from './EntityNav.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { pathname: '/admin/users' } }
+}));
+
+afterEach(cleanup);
+
+const props = {
+	userCount: 5,
+	groupCount: 3,
+	tagCount: 8,
+	canManageUsers: true,
+	canManageTags: true,
+	canManagePermissions: true,
+	canRunMaintenance: true
+};
+
+describe('EntityNav — flyout', () => {
+	it('flyout dialog is not visible initially', async () => {
+		render(EntityNav, props);
+		await expect.element(page.getByRole('dialog')).not.toBeInTheDocument();
+	});
+
+	it('clicking a flyout trigger opens the dialog', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+	});
+
+	it('flyout dialog has aria-modal="true"', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toHaveAttribute('aria-modal', 'true');
+	});
+
+	it('flyout dialog has an aria-label', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+		const dialog = document.querySelector('[role="dialog"]')!;
+		expect(dialog.getAttribute('aria-label')).toBeTruthy();
+	});
+
+	it('flyout contains navigation links to each entity', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+		const dialog = document.querySelector('[role="dialog"]')!;
+		const links = dialog.querySelectorAll('a[href^="/admin/"]');
+		expect(links.length).toBeGreaterThanOrEqual(3);
+	});
+
+	it('pressing Escape closes the flyout', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+		document.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }));
+		await expect.element(page.getByRole('dialog')).not.toBeInTheDocument();
+	});
+
+	it('clicking the backdrop closes the flyout', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+		document.querySelector<HTMLElement>('[data-flyout-backdrop]')!.click();
+		await expect.element(page.getByRole('dialog')).not.toBeInTheDocument();
+	});
+
+	it('clicking a flyout link closes the flyout', async () => {
+		render(EntityNav, props);
+		document.querySelector<HTMLButtonElement>('[data-flyout-trigger]')!.click();
+		await expect.element(page.getByRole('dialog')).toBeInTheDocument();
+		const dialog = document.querySelector('[role="dialog"]')!;
+		dialog.querySelector<HTMLAnchorElement>('a[href^="/admin/"]')!.click();
+		await expect.element(page.getByRole('dialog')).not.toBeInTheDocument();
+	});
+});

frontend/src/routes/admin/groups/+layout.server.ts

@@ -0,0 +1,8 @@
+import { createApiClient } from '$lib/api.server';
+import type { LayoutServerLoad } from './$types';
+
+export const load: LayoutServerLoad = async ({ fetch }) => {
+	const api = createApiClient(fetch);
+	const result = await api.GET('/api/groups');
+	return { groups: result.data ?? [] };
+};

frontend/src/routes/admin/groups/+layout.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+import { page } from '$app/state';
+import GroupsListPanel from './GroupsListPanel.svelte';
+
+let { data, children } = $props();
+
+const autoCollapse = $derived(page.url.pathname === '/admin/groups/new');
+const isAtListRoot = $derived(page.url.pathname === '/admin/groups');
+</script>
+
+<div class="{isAtListRoot ? 'flex' : 'hidden'} flex-shrink-0 md:flex">
+	<GroupsListPanel groups={data.groups} autocollapse={autoCollapse} />
+</div>
+
+<div class="{isAtListRoot ? 'hidden' : 'flex'} min-w-0 flex-1 flex-col overflow-hidden md:flex">
+	{@render children()}
+</div>

frontend/src/routes/admin/groups/+page.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+</script>
+
+<div class="flex flex-1 items-center justify-center p-8">
+	<p class="text-sm text-ink-3">{m.admin_groups_select_prompt()}</p>
+</div>

frontend/src/routes/admin/groups/GroupsListPanel.svelte

@@ -0,0 +1,109 @@
+<script lang="ts">
+import { page } from '$app/state';
+import { m } from '$lib/paraglide/messages.js';
+
+type Group = {
+	id: string;
+	name: string;
+	permissions: string[];
+};
+
+let {
+	groups,
+	autocollapse = false
+}: {
+	groups: Group[];
+	autocollapse?: boolean;
+} = $props();
+
+let manualCollapse = $state(
+	typeof localStorage !== 'undefined' &&
+		localStorage.getItem('admin_groups_list_collapsed') === 'true'
+);
+const isCollapsed = $derived(autocollapse || manualCollapse);
+
+$effect(() => {
+	if (typeof localStorage !== 'undefined') {
+		localStorage.setItem('admin_groups_list_collapsed', String(manualCollapse));
+	}
+});
+</script>
+
+{#if isCollapsed}
+	<!-- Collapsed handle: 32px -->
+	<button
+		onclick={() => (manualCollapse = false)}
+		aria-label={m.admin_btn_expand_list()}
+		class="flex w-8 flex-shrink-0 flex-col items-center gap-2 border-r border-line bg-surface pt-2 hover:bg-muted"
+	>
+		<span class="text-sm font-bold text-ink-2">›</span>
+		<span
+			class="text-[8px] font-extrabold tracking-widest text-ink-3 uppercase"
+			style="writing-mode: vertical-rl; transform: rotate(180deg);"
+		>
+			{m.admin_tab_groups()}
+		</span>
+	</button>
+{:else}
+	<div
+		class="flex w-[200px] flex-shrink-0 flex-col overflow-hidden border-r border-line bg-surface"
+	>
+		<!-- Panel header -->
+		<div class="flex items-center justify-between border-b border-line px-3 py-2">
+			<span class="text-xs font-bold tracking-widest text-ink-3 uppercase">
+				{m.admin_groups_list_title()}
+			</span>
+			<div class="flex items-center gap-1">
+				<a
+					href="/admin/groups/new"
+					class="inline-flex items-center gap-1 rounded-sm px-2 py-1 text-xs font-medium text-ink-2 transition-colors hover:bg-muted hover:text-ink"
+					title={m.admin_btn_new_group()}
+					aria-label={m.admin_btn_new_group()}
+				>
+					<svg
+						class="h-3.5 w-3.5"
+						fill="none"
+						viewBox="0 0 24 24"
+						stroke="currentColor"
+						stroke-width="2.5"
+						aria-hidden="true"
+					>
+						<path stroke-linecap="round" stroke-linejoin="round" d="M12 4v16m8-8H4" />
+					</svg>
+				</a>
+				<button
+					onclick={() => (manualCollapse = true)}
+					aria-label={m.admin_btn_collapse_list()}
+					class="flex h-6 w-6 items-center justify-center rounded-sm text-xs font-bold text-ink-2 transition-colors hover:bg-muted"
+				>
+					‹
+				</button>
+			</div>
+		</div>
+
+		<!-- Scrollable group list -->
+		<div class="flex-1 overflow-y-auto">
+			{#if groups.length === 0}
+				<p class="px-4 py-6 text-center text-xs text-ink-3">
+					{m.admin_groups_empty()}
+				</p>
+			{:else}
+				{#each groups as group (group.id)}
+					{@const isActive = page.url.pathname.startsWith('/admin/groups/' + group.id)}
+					<a
+						href="/admin/groups/{group.id}"
+						aria-current={isActive ? 'page' : undefined}
+						class="block border-l-2 px-3 py-2.5 transition-colors {isActive
+							? 'border-primary bg-primary/10 dark:bg-primary/15'
+							: 'border-transparent hover:bg-muted'}"
+					>
+						<div class="text-sm font-bold text-ink">{group.name}</div>
+						<div class="mt-0.5 text-xs text-ink-3">
+							{m.admin_groups_permission_count({ count: group.permissions.length })}
+						</div>
+					</a>
+				{/each}
+			{/if}
+		</div>
+	</div>
+{/if}

frontend/src/routes/admin/groups/[id]/+page.server.ts

@@ -0,0 +1,47 @@
+import { error, fail, redirect } from '@sveltejs/kit';
+import type { PageServerLoad, Actions } from './$types';
+import { createApiClient } from '$lib/api.server';
+import { getErrorMessage } from '$lib/errors';
+
+export const load: PageServerLoad = async ({ params, parent }) => {
+	const { groups } = await parent();
+	const group = groups.find((g: { id: string }) => g.id === params.id);
+	if (!group) throw error(404, getErrorMessage('GROUP_NOT_FOUND'));
+	return { group };
+};
+
+export const actions: Actions = {
+	update: async ({ params, request, fetch }) => {
+		const data = await request.formData();
+		const api = createApiClient(fetch);
+
+		const result = await api.PATCH('/api/groups/{id}', {
+			params: { path: { id: params.id } },
+			body: {
+				name: data.get('name') as string,
+				permissions: data.getAll('permissions') as string[]
+			}
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		return { success: true };
+	},
+
+	delete: async ({ params, fetch }) => {
+		const api = createApiClient(fetch);
+		const result = await api.DELETE('/api/groups/{id}', {
+			params: { path: { id: params.id } }
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		throw redirect(303, '/admin/groups');
+	}
+};

frontend/src/routes/admin/groups/[id]/+page.svelte

@@ -0,0 +1,208 @@
+<script lang="ts">
+import { enhance } from '$app/forms';
+import { beforeNavigate, goto } from '$app/navigation';
+import { m } from '$lib/paraglide/messages.js';
+
+let { data, form } = $props();
+
+let isDirty = $state(false);
+let showUnsavedWarning = $state(false);
+let discardTarget: string | null = $state(null);
+
+beforeNavigate(({ cancel, to }) => {
+	if (isDirty) {
+		cancel();
+		showUnsavedWarning = true;
+		discardTarget = to?.url.href ?? null;
+	}
+});
+
+$effect(() => {
+	if (form?.success) {
+		isDirty = false;
+		showUnsavedWarning = false;
+	}
+});
+
+const STANDARD_PERMISSIONS = $derived([
+	{ value: 'READ_ALL', label: m.admin_perm_read_all() },
+	{ value: 'ANNOTATE_ALL', label: m.admin_perm_annotate_all() },
+	{ value: 'WRITE_ALL', label: m.admin_perm_write_all() }
+]);
+
+const ADMIN_PERMISSIONS = $derived([
+	{ value: 'ADMIN', label: m.admin_perm_admin() },
+	{ value: 'ADMIN_USER', label: m.admin_perm_admin_user() },
+	{ value: 'ADMIN_TAG', label: m.admin_perm_admin_tag() },
+	{ value: 'ADMIN_PERMISSION', label: m.admin_perm_admin_permission() }
+]);
+</script>
+
+<div class="flex flex-1 flex-col overflow-hidden">
+	<!-- Header -->
+	<div class="flex items-center border-b border-line px-5 py-3">
+		<a
+			href="/admin/groups"
+			class="mr-3 inline-flex items-center gap-1 text-xs text-ink-3 hover:text-ink md:hidden"
+		>
+			<svg
+				class="h-4 w-4"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="2"
+				aria-hidden="true"
+			>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
+			</svg>
+		</a>
+		<h2 class="flex-1 font-sans text-sm font-bold text-ink">
+			{m.admin_group_edit_heading({ name: data.group.name })}
+		</h2>
+		<form
+			method="POST"
+			action="?/delete"
+			use:enhance={({ cancel }) => {
+				if (!confirm(m.admin_group_delete_confirm())) cancel();
+				return async ({ update }) => {
+					await update();
+				};
+			}}
+		>
+			<button
+				type="submit"
+				class="rounded-sm border border-red-200 bg-red-50 px-3 py-1.5 font-sans text-xs font-bold tracking-widest text-red-700 uppercase transition-colors hover:bg-red-100 dark:border-red-800 dark:bg-red-950/40 dark:text-red-400 dark:hover:bg-red-950/60"
+			>
+				{m.btn_delete()}
+			</button>
+		</form>
+	</div>
+
+	<!-- Scrollable body -->
+	<div class="flex-1 overflow-y-auto px-5 py-5">
+		{#if showUnsavedWarning}
+			<div
+				class="mb-5 flex items-center justify-between rounded border border-amber-200 bg-amber-50 p-3 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-300"
+			>
+				<span>{m.admin_unsaved_warning()}</span>
+				<button
+					type="button"
+					onclick={() => {
+						isDirty = false;
+						showUnsavedWarning = false;
+						if (discardTarget) goto(discardTarget);
+					}}
+					class="ml-4 shrink-0 font-sans text-xs font-bold tracking-widest text-amber-800 uppercase hover:text-amber-900 dark:text-amber-300"
+				>
+					{m.person_discard_changes()}
+				</button>
+			</div>
+		{/if}
+		{#if form?.success}
+			<div
+				class="mb-5 rounded border border-green-200 bg-green-50 p-3 text-sm text-green-700 dark:border-green-800 dark:bg-green-950/40 dark:text-green-400"
+			>
+				{m.admin_group_updated()}
+			</div>
+		{/if}
+		{#if form?.error}
+			<div
+				class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700 dark:border-red-800 dark:bg-red-950/40 dark:text-red-400"
+			>
+				{form.error}
+			</div>
+		{/if}
+
+		<form
+			id="edit-group-form"
+			method="POST"
+			action="?/update"
+			use:enhance
+			oninput={() => {
+				isDirty = true;
+				showUnsavedWarning = false;
+			}}
+		>
+			<!-- Group name card -->
+			<div class="mb-5 rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_col_name()}
+				</h3>
+				<input
+					type="text"
+					name="name"
+					value={data.group.name}
+					required
+					class="bg-background w-full rounded-sm border border-line px-3 py-2 font-sans text-sm text-ink placeholder:text-ink-3 focus:border-primary focus:ring-1 focus:ring-primary focus:outline-none"
+				/>
+			</div>
+
+			<!-- Standard permissions card -->
+			<div class="mb-5 rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_groups_section_standard()}
+				</h3>
+				<div class="space-y-3">
+					{#each STANDARD_PERMISSIONS as perm (perm.value)}
+						<label class="flex items-center gap-2 text-sm text-ink">
+							<input
+								type="checkbox"
+								name="permissions"
+								value={perm.value}
+								checked={data.group.permissions.includes(perm.value)}
+								class="h-4 w-4 rounded border-line text-primary focus:ring-primary"
+							/>
+							{perm.label}
+						</label>
+					{/each}
+				</div>
+			</div>
+
+			<!-- Administrative permissions card -->
+			<div
+				class="rounded-sm border border-amber-200 bg-amber-50 p-5 shadow-sm dark:border-amber-900 dark:bg-amber-950/30"
+			>
+				<h3
+					class="mb-4 text-xs font-bold tracking-widest text-amber-700 uppercase dark:text-amber-400"
+				>
+					{m.admin_groups_section_administrative()}
+				</h3>
+				<div class="space-y-3">
+					{#each ADMIN_PERMISSIONS as perm (perm.value)}
+						<label
+							class="flex items-center gap-2 text-sm {perm.value === 'ADMIN'
+								? 'font-semibold text-amber-800 dark:text-amber-300'
+								: 'text-ink'}"
+						>
+							<input
+								type="checkbox"
+								name="permissions"
+								value={perm.value}
+								checked={data.group.permissions.includes(perm.value)}
+								class="h-4 w-4 rounded border-amber-300 text-amber-600 focus:ring-amber-500 dark:border-amber-700"
+							/>
+							{perm.label}
+						</label>
+					{/each}
+				</div>
+			</div>
+		</form>
+	</div>
+
+	<!-- Docked footer -->
+	<div class="flex items-center justify-between border-t border-line bg-surface px-5 py-3">
+		<a
+			href="/admin/groups"
+			class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+		>
+			{m.btn_cancel()}
+		</a>
+		<button
+			type="submit"
+			form="edit-group-form"
+			class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+		>
+			{m.btn_save()}
+		</button>
+	</div>
+</div>

frontend/src/routes/admin/groups/[id]/page.server.spec.ts

@@ -0,0 +1,87 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { actions } from './+page.server';
+
+const mockApi = {
+	PATCH: vi.fn(),
+	DELETE: vi.fn()
+};
+
+vi.mock('$lib/api.server', () => ({
+	createApiClient: () => mockApi
+}));
+
+beforeEach(() => vi.clearAllMocks());
+
+// ─── update action ─────────────────────────────────────────────────────────────
+
+describe('groups/[id] — update action', () => {
+	it('returns success: true when API responds ok', async () => {
+		mockApi.PATCH.mockResolvedValue({ response: { ok: true }, data: {} });
+
+		const formData = new FormData();
+		formData.set('name', 'Editors');
+		formData.append('permissions', 'WRITE_ALL');
+
+		const result = await actions.update({
+			params: { id: 'g1' },
+			request: { formData: async () => formData },
+			fetch
+		} as never);
+
+		expect(result).toEqual({ success: true });
+	});
+
+	it('returns fail with error message when API responds not ok', async () => {
+		mockApi.PATCH.mockResolvedValue({
+			response: { ok: false, status: 409 },
+			error: { code: 'GROUP_NOT_FOUND' }
+		});
+
+		const formData = new FormData();
+		formData.set('name', 'Editors');
+
+		const result = await actions.update({
+			params: { id: 'g1' },
+			request: { formData: async () => formData },
+			fetch
+		} as never);
+
+		expect((result as { status: number }).status).toBe(409);
+	});
+});
+
+// ─── delete action ─────────────────────────────────────────────────────────────
+
+describe('groups/[id] — delete action', () => {
+	it('redirects to /admin/groups on successful delete', async () => {
+		mockApi.DELETE.mockResolvedValue({ response: { ok: true } });
+
+		let redirectUrl: string | null = null;
+		try {
+			await actions.delete({
+				params: { id: 'g1' },
+				fetch
+			} as never);
+		} catch (e: unknown) {
+			// SvelteKit redirect throws a Response-like object
+			const r = e as { location?: string; status?: number };
+			redirectUrl = r.location ?? null;
+		}
+
+		expect(redirectUrl).toBe('/admin/groups');
+	});
+
+	it('returns fail with error message when delete API responds not ok', async () => {
+		mockApi.DELETE.mockResolvedValue({
+			response: { ok: false, status: 403 },
+			error: { code: 'FORBIDDEN' }
+		});
+
+		const result = await actions.delete({
+			params: { id: 'g1' },
+			fetch
+		} as never);
+
+		expect((result as { status: number }).status).toBe(403);
+	});
+});

frontend/src/routes/admin/groups/[id]/page.svelte.spec.ts

@@ -0,0 +1,149 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import Page from './+page.svelte';
+
+vi.mock('$app/forms', () => ({ enhance: () => () => {} }));
+vi.mock('$app/navigation', () => ({ beforeNavigate: vi.fn(), goto: vi.fn() }));
+
+import { beforeNavigate, goto } from '$app/navigation';
+
+const baseGroup = { id: 'g1', name: 'Editoren', permissions: ['WRITE_ALL'] };
+const baseData = { group: baseGroup };
+
+afterEach(cleanup);
+
+// ─── Rendering ────────────────────────────────────────────────────────────────
+
+describe('Admin edit group page – rendering', () => {
+	it('renders the heading with group name', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect.element(page.getByText(/Gruppe: Editoren/i)).toBeInTheDocument();
+	});
+
+	it('pre-fills the name input', async () => {
+		render(Page, { data: baseData, form: null });
+		const input = document.querySelector<HTMLInputElement>('input[name="name"]');
+		expect(input?.value).toBe('Editoren');
+	});
+
+	it('pre-checks permissions that the group already has', async () => {
+		render(Page, { data: baseData, form: null });
+		const checkbox = document.querySelector<HTMLInputElement>(
+			'input[type="checkbox"][name="permissions"][value="WRITE_ALL"]'
+		);
+		expect(checkbox?.checked).toBe(true);
+	});
+
+	it('renders the cancel link pointing to /admin/groups', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect
+			.element(page.getByRole('link', { name: /Abbrechen/i }))
+			.toHaveAttribute('href', '/admin/groups');
+	});
+
+	it('renders a READ_ALL checkbox in the standard permissions section', async () => {
+		render(Page, { data: baseData, form: null });
+		const cb = document.querySelector<HTMLInputElement>(
+			'input[type="checkbox"][name="permissions"][value="READ_ALL"]'
+		);
+		expect(cb).not.toBeNull();
+	});
+
+	it('renders an ANNOTATE_ALL checkbox in the standard permissions section', async () => {
+		render(Page, { data: baseData, form: null });
+		const cb = document.querySelector<HTMLInputElement>(
+			'input[type="checkbox"][name="permissions"][value="ANNOTATE_ALL"]'
+		);
+		expect(cb).not.toBeNull();
+	});
+
+	it('pre-checks READ_ALL when group has it', async () => {
+		const data = { group: { id: 'g2', name: 'Leser', permissions: ['READ_ALL'] } };
+		render(Page, { data, form: null });
+		const cb = document.querySelector<HTMLInputElement>(
+			'input[type="checkbox"][name="permissions"][value="READ_ALL"]'
+		);
+		expect(cb?.checked).toBe(true);
+	});
+
+	it('pre-checks ANNOTATE_ALL when group has it', async () => {
+		const data = {
+			group: { id: 'g3', name: 'Annotatoren', permissions: ['READ_ALL', 'ANNOTATE_ALL'] }
+		};
+		render(Page, { data, form: null });
+		const cb = document.querySelector<HTMLInputElement>(
+			'input[type="checkbox"][name="permissions"][value="ANNOTATE_ALL"]'
+		);
+		expect(cb?.checked).toBe(true);
+	});
+});
+
+// ─── Unsaved-changes guard ────────────────────────────────────────────────────
+
+describe('Admin edit group page – unsaved-changes guard', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	it('does not show unsaved warning initially', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).not.toBeInTheDocument();
+	});
+
+	it('cancels navigation and shows warning when form is dirty', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="name"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/groups/g2') } });
+
+		expect(cancel).toHaveBeenCalled();
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).toBeInTheDocument();
+	});
+
+	it('does not cancel navigation when form is clean', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/groups/g2') } });
+
+		expect(cancel).not.toHaveBeenCalled();
+	});
+
+	it('discard button calls goto with the target URL', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="name"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		callback({ cancel: vi.fn(), to: { url: new URL('http://localhost/admin/groups/g2') } });
+
+		await page.getByRole('button', { name: /verwerfen/i }).click();
+
+		expect(vi.mocked(goto)).toHaveBeenCalledWith('http://localhost/admin/groups/g2');
+	});
+
+	it('clears dirty state when form saves successfully', async () => {
+		const { rerender } = render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="name"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		callback({ cancel: vi.fn(), to: { url: new URL('http://localhost/admin/groups/g2') } });
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).toBeInTheDocument();
+
+		await rerender({ data: baseData, form: { success: true } });
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/groups/g2') } });
+		expect(cancel).not.toHaveBeenCalled();
+	});
+});

frontend/src/routes/admin/groups/layout.server.spec.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { load } from './+layout.server';
+
+vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
+
+import { createApiClient } from '$lib/api.server';
+
+function mockApi(groups: unknown[]) {
+	vi.mocked(createApiClient).mockReturnValue({
+		GET: vi.fn().mockResolvedValueOnce({ response: { ok: true }, data: groups })
+	} as ReturnType<typeof createApiClient>);
+}
+
+beforeEach(() => vi.clearAllMocks());
+
+describe('admin/groups layout load', () => {
+	it('returns the groups list', async () => {
+		mockApi([
+			{ id: 'g1', name: 'Admins', permissions: ['ADMIN'] },
+			{ id: 'g2', name: 'Editors', permissions: ['WRITE_ALL'] }
+		]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.groups).toHaveLength(2);
+		expect(result.groups[0].name).toBe('Admins');
+	});
+
+	it('returns an empty array when the API returns nothing', async () => {
+		mockApi([]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.groups).toEqual([]);
+	});
+
+	it('calls GET /api/groups', async () => {
+		const mockGet = vi.fn().mockResolvedValue({ response: { ok: true }, data: [] });
+		vi.mocked(createApiClient).mockReturnValue({ GET: mockGet } as ReturnType<
+			typeof createApiClient
+		>);
+		await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(mockGet).toHaveBeenCalledWith('/api/groups');
+	});
+});

frontend/src/routes/admin/groups/layout.svelte.spec.ts

@@ -0,0 +1,118 @@
+import { afterEach, beforeEach, describe, it, expect, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import GroupsListPanel from './GroupsListPanel.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { pathname: '/admin/groups/g1' } }
+}));
+
+afterEach(cleanup);
+
+const groups = [
+	{ id: 'g1', name: 'Administrators', permissions: ['ADMIN', 'WRITE_ALL'] },
+	{ id: 'g2', name: 'Editors', permissions: ['WRITE_ALL'] },
+	{ id: 'g3', name: 'Readers', permissions: [] }
+];
+
+describe('GroupsListPanel — header', () => {
+	it('renders the panel title', async () => {
+		render(GroupsListPanel, { groups });
+		await expect.element(page.getByText(/Alle Gruppen/i)).toBeInTheDocument();
+	});
+
+	it('renders a new-group link pointing to /admin/groups/new', async () => {
+		render(GroupsListPanel, { groups });
+		await expect
+			.element(page.getByRole('link', { name: /neue gruppe/i }))
+			.toHaveAttribute('href', '/admin/groups/new');
+	});
+});
+
+describe('GroupsListPanel — group items', () => {
+	it('renders each group name', async () => {
+		render(GroupsListPanel, { groups });
+		await expect.element(page.getByRole('link', { name: /administrators/i })).toBeInTheDocument();
+		await expect.element(page.getByRole('link', { name: /editors/i })).toBeInTheDocument();
+	});
+
+	it('each group links to /admin/groups/[id]', async () => {
+		const { container } = render(GroupsListPanel, { groups });
+		const links = container.querySelectorAll<HTMLAnchorElement>('a[href^="/admin/groups/g"]');
+		expect(links.length).toBe(3);
+		expect(links[0].getAttribute('href')).toBe('/admin/groups/g1');
+	});
+
+	it('shows permission count as subtitle', async () => {
+		render(GroupsListPanel, { groups });
+		// Administrators has 2 permissions
+		await expect.element(page.getByText(/2 Berechtigungen/i)).toBeInTheDocument();
+	});
+
+	it('shows "no permissions" for a group with zero permissions', async () => {
+		render(GroupsListPanel, { groups });
+		await expect.element(page.getByText(/0 Berechtigungen/i)).toBeInTheDocument();
+	});
+});
+
+describe('GroupsListPanel — active state', () => {
+	it('marks the active group link with aria-current=page', async () => {
+		render(GroupsListPanel, { groups });
+		await expect
+			.element(page.getByRole('link', { name: /administrators/i }))
+			.toHaveAttribute('aria-current', 'page');
+	});
+
+	it('does not mark inactive group links with aria-current', async () => {
+		render(GroupsListPanel, { groups });
+		await expect
+			.element(page.getByRole('link', { name: /editors/i }))
+			.not.toHaveAttribute('aria-current');
+	});
+});
+
+describe('GroupsListPanel — empty state', () => {
+	it('shows empty state when groups array is empty', async () => {
+		render(GroupsListPanel, { groups: [] });
+		await expect.element(page.getByText(/keine gruppen/i)).toBeInTheDocument();
+	});
+});
+
+// ─── Collapse toggle ──────────────────────────────────────────────────────────
+
+describe('GroupsListPanel — collapse toggle', () => {
+	beforeEach(() => localStorage.removeItem('admin_groups_list_collapsed'));
+
+	it('renders a collapse button with aria-label', async () => {
+		render(GroupsListPanel, { groups });
+		await expect
+			.element(page.getByRole('button', { name: /Liste einklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('clicking collapse shows the expand handle', async () => {
+		render(GroupsListPanel, { groups });
+		await expect
+			.element(page.getByRole('button', { name: /Liste einklappen/i }))
+			.toBeInTheDocument();
+		document.querySelector<HTMLButtonElement>('[aria-label="Liste einklappen"]')!.click();
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('autocollapse prop starts the panel in collapsed state', async () => {
+		render(GroupsListPanel, { groups, autocollapse: true });
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('persists collapse state using the groups-specific localStorage key', async () => {
+		const setSpy = vi.spyOn(Storage.prototype, 'setItem');
+		render(GroupsListPanel, { groups });
+		document.querySelector<HTMLButtonElement>('[aria-label="Liste einklappen"]')!.click();
+		expect(setSpy).toHaveBeenCalledWith('admin_groups_list_collapsed', 'true');
+		setSpy.mockRestore();
+	});
+});

frontend/src/routes/admin/groups/new/+page.server.ts

@@ -0,0 +1,25 @@
+import { fail, redirect } from '@sveltejs/kit';
+import type { Actions } from './$types';
+import { createApiClient } from '$lib/api.server';
+import { getErrorMessage } from '$lib/errors';
+
+export const actions: Actions = {
+	default: async ({ request, fetch }) => {
+		const data = await request.formData();
+		const api = createApiClient(fetch);
+
+		const result = await api.POST('/api/groups', {
+			body: {
+				name: data.get('name') as string,
+				permissions: data.getAll('permissions') as string[]
+			}
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		throw redirect(303, '/admin/groups');
+	}
+};

frontend/src/routes/admin/groups/new/+page.svelte

@@ -0,0 +1,176 @@
+<script lang="ts">
+import { enhance } from '$app/forms';
+import { beforeNavigate, goto } from '$app/navigation';
+import { m } from '$lib/paraglide/messages.js';
+
+const availableStandard = $derived([
+	{ value: 'READ_ALL', label: m.admin_perm_read_all() },
+	{ value: 'ANNOTATE_ALL', label: m.admin_perm_annotate_all() },
+	{ value: 'WRITE_ALL', label: m.admin_perm_write_all() }
+]);
+const availableAdmin = $derived([
+	{ value: 'ADMIN', label: m.admin_perm_admin() },
+	{ value: 'ADMIN_USER', label: m.admin_perm_admin_user() },
+	{ value: 'ADMIN_TAG', label: m.admin_perm_admin_tag() },
+	{ value: 'ADMIN_PERMISSION', label: m.admin_perm_admin_permission() }
+]);
+
+let { form } = $props();
+
+let isDirty = $state(false);
+let showUnsavedWarning = $state(false);
+let discardTarget: string | null = $state(null);
+
+beforeNavigate(({ cancel, to }) => {
+	if (isDirty) {
+		cancel();
+		showUnsavedWarning = true;
+		discardTarget = to?.url.href ?? null;
+	}
+});
+</script>
+
+<div class="flex flex-1 flex-col overflow-hidden">
+	<!-- Detail panel header -->
+	<div
+		class="flex items-center border-b border-green-200 bg-green-50 px-5 py-3 dark:border-green-900 dark:bg-green-950/30"
+	>
+		<a
+			href="/admin/groups"
+			class="mr-3 inline-flex items-center gap-1 text-xs text-green-700 hover:text-green-900 md:hidden"
+		>
+			<svg
+				class="h-4 w-4"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="2"
+				aria-hidden="true"
+			>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
+			</svg>
+		</a>
+		<h2 class="flex-1 font-sans text-sm font-bold text-green-800 dark:text-green-300">
+			{m.admin_group_new_heading()}
+		</h2>
+	</div>
+
+	<!-- Scrollable body -->
+	<div class="flex-1 overflow-y-auto px-5 py-5">
+		{#if showUnsavedWarning}
+			<div
+				class="mb-5 flex items-center justify-between rounded border border-amber-200 bg-amber-50 p-3 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-300"
+			>
+				<span>{m.admin_unsaved_warning()}</span>
+				<button
+					type="button"
+					onclick={() => {
+						isDirty = false;
+						showUnsavedWarning = false;
+						if (discardTarget) goto(discardTarget);
+					}}
+					class="ml-4 shrink-0 font-sans text-xs font-bold tracking-widest text-amber-800 uppercase hover:text-amber-900 dark:text-amber-300"
+				>
+					{m.person_discard_changes()}
+				</button>
+			</div>
+		{/if}
+		{#if form?.error}
+			<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
+				{form.error}
+			</div>
+		{/if}
+
+		<form
+			id="new-group-form"
+			method="POST"
+			use:enhance
+			oninput={() => {
+				isDirty = true;
+				showUnsavedWarning = false;
+			}}
+			class="space-y-5"
+		>
+			<!-- Name card -->
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-3 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_col_name()}
+				</h3>
+				<input
+					type="text"
+					name="name"
+					placeholder={m.admin_group_name_placeholder()}
+					required
+					class="w-full rounded-sm border border-line bg-surface px-3 py-2 text-sm text-ink placeholder:text-ink-3 focus:ring-1 focus:ring-primary focus:outline-none"
+				/>
+			</div>
+
+			<!-- Standard permissions -->
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-3 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_groups_section_standard()}
+				</h3>
+				<div class="space-y-2">
+					{#each availableStandard as perm (perm.value)}
+						<label class="flex items-center gap-2 text-sm text-ink">
+							<input
+								type="checkbox"
+								name="permissions"
+								value={perm.value}
+								class="rounded border-line text-primary focus:ring-primary"
+							/>
+							<span class="font-mono text-xs font-bold uppercase">{perm.value}</span>
+							<span class="text-ink-3">— {perm.label}</span>
+						</label>
+					{/each}
+				</div>
+			</div>
+
+			<!-- Administrative permissions -->
+			<div
+				class="rounded-sm border border-amber-200 bg-amber-50 p-5 shadow-sm dark:border-amber-900 dark:bg-amber-950/30"
+			>
+				<h3
+					class="mb-3 text-xs font-bold tracking-widest text-amber-700 uppercase dark:text-amber-400"
+				>
+					{m.admin_groups_section_administrative()}
+				</h3>
+				<div class="space-y-2">
+					{#each availableAdmin as perm (perm.value)}
+						<label
+							class="flex items-center gap-2 text-sm {perm.value === 'ADMIN'
+								? 'font-bold text-red-700 dark:text-red-400'
+								: 'text-ink'}"
+						>
+							<input
+								type="checkbox"
+								name="permissions"
+								value={perm.value}
+								class="rounded border-line text-primary focus:ring-primary"
+							/>
+							<span class="font-mono text-xs font-bold uppercase">{perm.value}</span>
+							<span class="font-normal text-ink-3">— {perm.label}</span>
+						</label>
+					{/each}
+				</div>
+			</div>
+		</form>
+	</div>
+
+	<!-- Docked footer -->
+	<div class="flex items-center justify-between border-t border-line bg-surface px-5 py-3">
+		<a
+			href="/admin/groups"
+			class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+		>
+			{m.btn_cancel()}
+		</a>
+		<button
+			type="submit"
+			form="new-group-form"
+			class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+		>
+			{m.btn_create()}
+		</button>
+	</div>
+</div>

frontend/src/routes/admin/layout.server.spec.ts

@@ -0,0 +1,72 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { load } from './+layout.server';
+
+vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
+
+import { createApiClient } from '$lib/api.server';
+
+function mockApi(users: unknown[], groups: unknown[], tags: unknown[]) {
+	vi.mocked(createApiClient).mockReturnValue({
+		GET: vi
+			.fn()
+			.mockResolvedValueOnce({ response: { ok: true }, data: users })
+			.mockResolvedValueOnce({ response: { ok: true }, data: groups })
+			.mockResolvedValueOnce({ response: { ok: true }, data: tags })
+	} as ReturnType<typeof createApiClient>);
+}
+
+const adminUser = {
+	groups: [{ permissions: ['ADMIN', 'ADMIN_USER', 'ADMIN_TAG', 'ADMIN_PERMISSION'] }]
+};
+const tagAdminUser = { groups: [{ permissions: ['ADMIN_TAG'] }] };
+const noPermUser = { groups: [{ permissions: ['READ_ALL'] }] };
+
+beforeEach(() => vi.clearAllMocks());
+
+describe('admin layout load — permission check', () => {
+	it('throws 403 when user has no admin permission', async () => {
+		await expect(
+			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: noPermUser } })
+		).rejects.toMatchObject({ status: 403 });
+	});
+
+	it('throws 403 when user is undefined', async () => {
+		await expect(
+			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: undefined } })
+		).rejects.toMatchObject({ status: 403 });
+	});
+
+	it('throws 403 when user has no groups', async () => {
+		await expect(
+			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: { groups: [] } } })
+		).rejects.toMatchObject({ status: 403 });
+	});
+
+	it('allows access for a user with ADMIN_TAG only', async () => {
+		mockApi([], [], []);
+		await expect(
+			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: tagAdminUser } })
+		).resolves.toBeDefined();
+	});
+
+	it('returns entity counts and permission flags for a full admin', async () => {
+		mockApi(
+			[{ id: 'u1' }, { id: 'u2' }],
+			[{ id: 'g1' }],
+			[{ id: 't1' }, { id: 't2' }, { id: 't3' }]
+		);
+
+		const result = await load({
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: adminUser }
+		});
+
+		expect(result.userCount).toBe(2);
+		expect(result.groupCount).toBe(1);
+		expect(result.tagCount).toBe(3);
+		expect(result.canManageUsers).toBe(true);
+		expect(result.canManageTags).toBe(true);
+		expect(result.canManagePermissions).toBe(true);
+		expect(result.canRunMaintenance).toBe(true);
+	});
+});

frontend/src/routes/admin/layout.svelte.spec.ts

@@ -0,0 +1,87 @@
+/**
+ * Layout shell tests — we test EntityNav.svelte directly since the layout
+ * itself is a thin shell that just composes EntityNav and renders children.
+ */
+import { afterEach, describe, it, expect, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import EntityNav from './EntityNav.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { pathname: '/admin/users' } }
+}));
+
+afterEach(cleanup);
+
+const fullPerms = {
+	userCount: 4,
+	groupCount: 3,
+	tagCount: 7,
+	canManageUsers: true,
+	canManageTags: true,
+	canManagePermissions: true,
+	canRunMaintenance: true
+};
+
+describe('admin EntityNav — links', () => {
+	it('renders users nav link pointing to /admin/users', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /benutzer/i }))
+			.toHaveAttribute('href', '/admin/users');
+	});
+
+	it('renders groups nav link pointing to /admin/groups', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /gruppen/i }))
+			.toHaveAttribute('href', '/admin/groups');
+	});
+
+	it('renders tags nav link pointing to /admin/tags', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /schlagworte/i }))
+			.toHaveAttribute('href', '/admin/tags');
+	});
+
+	it('renders system nav link pointing to /admin/system', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /system/i }))
+			.toHaveAttribute('href', '/admin/system');
+	});
+});
+
+describe('admin EntityNav — permission-based rendering', () => {
+	it('hides users link when canManageUsers is false', async () => {
+		render(EntityNav, { ...fullPerms, canManageUsers: false });
+		await expect.element(page.getByRole('link', { name: /benutzer/i })).not.toBeInTheDocument();
+	});
+
+	it('hides tags link when canManageTags is false', async () => {
+		render(EntityNav, { ...fullPerms, canManageTags: false });
+		await expect.element(page.getByRole('link', { name: /schlagworte/i })).not.toBeInTheDocument();
+	});
+
+	it('hides system link when canRunMaintenance is false', async () => {
+		render(EntityNav, { ...fullPerms, canRunMaintenance: false });
+		await expect.element(page.getByRole('link', { name: /system/i })).not.toBeInTheDocument();
+	});
+});
+
+describe('admin EntityNav — active state', () => {
+	it('marks users link as aria-current=page when on /admin/users', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /benutzer/i }))
+			.toHaveAttribute('aria-current', 'page');
+	});
+
+	it('does not mark groups link as current when on /admin/users', async () => {
+		render(EntityNav, fullPerms);
+		await expect
+			.element(page.getByRole('link', { name: /gruppen/i }))
+			.not.toHaveAttribute('aria-current');
+	});
+});

frontend/src/routes/admin/page.server.spec.ts

@@ -1,77 +0,0 @@
-import { describe, expect, it, vi, beforeEach } from 'vitest';
-import { load } from './+page.server';
-
-vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
-
-import { createApiClient } from '$lib/api.server';
-
-const adminUser = { groups: [{ permissions: ['ADMIN'] }] };
-const readOnlyUser = { groups: [{ permissions: ['READ_ALL'] }] };
-
-function mockApiReturning(users: unknown[], groups: unknown[], tags: unknown[]) {
-	vi.mocked(createApiClient).mockReturnValue({
-		GET: vi
-			.fn()
-			.mockResolvedValueOnce({ response: { ok: true }, data: users })
-			.mockResolvedValueOnce({ response: { ok: true }, data: groups })
-			.mockResolvedValueOnce({ response: { ok: true }, data: tags })
-	} as ReturnType<typeof createApiClient>);
-}
-
-beforeEach(() => vi.clearAllMocks());
-
-// ─── permission check ─────────────────────────────────────────────────────────
-
-describe('admin load — permission check', () => {
-	it('throws 403 when user has no ADMIN permission', async () => {
-		await expect(
-			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: readOnlyUser } })
-		).rejects.toMatchObject({ status: 403 });
-	});
-
-	it('throws 403 when user is undefined', async () => {
-		await expect(
-			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: undefined } })
-		).rejects.toMatchObject({ status: 403 });
-	});
-
-	it('throws 403 when user has no groups', async () => {
-		await expect(
-			load({ fetch: vi.fn() as unknown as typeof fetch, locals: { user: { groups: [] } } })
-		).rejects.toMatchObject({ status: 403 });
-	});
-});
-
-// ─── happy path ───────────────────────────────────────────────────────────────
-
-describe('admin load — happy path', () => {
-	it('returns users, groups, and tags for an admin user', async () => {
-		mockApiReturning(
-			[{ id: 'u1', username: 'alice' }],
-			[{ id: 'g1', name: 'Editors' }],
-			[{ id: 't1', name: 'Familie' }]
-		);
-
-		const result = await load({
-			fetch: vi.fn() as unknown as typeof fetch,
-			locals: { user: adminUser }
-		});
-
-		expect(result.users).toHaveLength(1);
-		expect(result.groups).toHaveLength(1);
-		expect(result.tags).toHaveLength(1);
-	});
-
-	it('returns empty arrays when API returns no data', async () => {
-		mockApiReturning([], [], []);
-
-		const result = await load({
-			fetch: vi.fn() as unknown as typeof fetch,
-			locals: { user: adminUser }
-		});
-
-		expect(result.users).toEqual([]);
-		expect(result.groups).toEqual([]);
-		expect(result.tags).toEqual([]);
-	});
-});

frontend/src/routes/admin/page.svelte.spec.ts

@@ -1,83 +1,73 @@
+/**
+ * Tests for the admin root page — the mobile entity picker.
+ * On md+ viewports the page immediately redirects to /admin/users (tested
+ * in e2e). Here we verify the mobile-only list of entity links.
+ */
 import { afterEach, describe, expect, it, vi } from 'vitest';
 import { cleanup, render } from 'vitest-browser-svelte';
 import { page } from 'vitest/browser';
 import Page from './+page.svelte';
 
-vi.mock('$app/forms', () => ({ enhance: () => () => {} }));
+vi.mock('$app/navigation', () => ({ goto: vi.fn() }));
 
-const makeGroup = (overrides = {}) => ({
-	id: 'g1',
-	name: 'Editoren',
-	permissions: ['WRITE_ALL'],
-	...overrides
-});
-
-const makeUser = (overrides = {}) => ({
-	id: 'u1',
-	username: 'max',
-	firstName: 'Max',
-	lastName: 'Mustermann',
-	email: 'max@example.com',
-	birthDate: undefined,
-	contact: undefined,
-	enabled: true,
-	groups: [makeGroup()],
-	createdAt: '2024-01-01T00:00:00Z',
-	...overrides
-});
-
-const baseData = {
-	user: undefined,
-	canWrite: true,
-	canAnnotate: false,
-	users: [makeUser()],
-	groups: [makeGroup()],
-	tags: []
+const fullData = {
+	userCount: 4,
+	groupCount: 3,
+	tagCount: 7,
+	canManageUsers: true,
+	canManageTags: true,
+	canManagePermissions: true,
+	canRunMaintenance: true
 };
 
 afterEach(cleanup);
 
-// ─── Users tab ────────────────────────────────────────────────────────────────
-
-describe('Admin page – users tab', () => {
-	it('shows the username in the table', async () => {
-		render(Page, { data: baseData, form: null });
-		await expect.element(page.getByRole('cell', { name: 'max', exact: true })).toBeInTheDocument();
+describe('Admin root page – entity picker', () => {
+	it('renders the admin heading', async () => {
+		render(Page, { data: fullData });
+		await expect.element(page.getByRole('heading')).toBeInTheDocument();
 	});
 
-	it('shows the full name in the table', async () => {
-		render(Page, { data: baseData, form: null });
-		await expect.element(page.getByText(/Max Mustermann/)).toBeInTheDocument();
-	});
-
-	it('shows a dash when user has no name set', async () => {
-		const data = { ...baseData, users: [makeUser({ firstName: undefined, lastName: undefined })] };
-		render(Page, { data, form: null });
-		await expect.element(page.getByText('–')).toBeInTheDocument();
-	});
-
-	it('shows group badges for the user', async () => {
-		render(Page, { data: baseData, form: null });
-		await expect.element(page.getByText('Editoren')).toBeInTheDocument();
-	});
-
-	it('edit link points to /admin/users/[id]', async () => {
-		render(Page, { data: baseData, form: null });
+	it('renders users link pointing to /admin/users', async () => {
+		render(Page, { data: fullData });
 		await expect
-			.element(page.getByRole('link', { name: /Bearbeiten/i }))
-			.toHaveAttribute('href', '/admin/users/u1');
+			.element(page.getByRole('link', { name: /benutzer/i }))
+			.toHaveAttribute('href', '/admin/users');
 	});
 
-	it('new user button links to /admin/users/new', async () => {
-		render(Page, { data: baseData, form: null });
+	it('renders groups link pointing to /admin/groups', async () => {
+		render(Page, { data: fullData });
 		await expect
-			.element(page.getByRole('link', { name: /Neuer Benutzer/i }))
-			.toHaveAttribute('href', '/admin/users/new');
+			.element(page.getByRole('link', { name: /gruppen/i }))
+			.toHaveAttribute('href', '/admin/groups');
 	});
 
-	it('shows "no groups" label when user has no groups', async () => {
-		const data = { ...baseData, users: [makeUser({ groups: [] })] };
-		render(Page, { data, form: null });
-		await expect.element(page.getByText(/Keine Gruppen/i)).toBeInTheDocument();
+	it('renders tags link pointing to /admin/tags', async () => {
+		render(Page, { data: fullData });
+		await expect
+			.element(page.getByRole('link', { name: /schlagworte/i }))
+			.toHaveAttribute('href', '/admin/tags');
+	});
+
+	it('renders system link pointing to /admin/system', async () => {
+		render(Page, { data: fullData });
+		await expect
+			.element(page.getByRole('link', { name: /system/i }))
+			.toHaveAttribute('href', '/admin/system');
+	});
+
+	it('hides users link when canManageUsers is false', async () => {
+		render(Page, { data: { ...fullData, canManageUsers: false } });
+		await expect.element(page.getByRole('link', { name: /benutzer/i })).not.toBeInTheDocument();
+	});
+
+	it('hides system link when canRunMaintenance is false', async () => {
+		render(Page, { data: { ...fullData, canRunMaintenance: false } });
+		await expect.element(page.getByRole('link', { name: /system/i })).not.toBeInTheDocument();
+	});
+
+	it('shows user count', async () => {
+		render(Page, { data: fullData });
+		await expect.element(page.getByText('4')).toBeInTheDocument();
 	});
 });

frontend/src/routes/admin/system/+page.svelte

@@ -0,0 +1,172 @@
+<script lang="ts">
+import { onDestroy } from 'svelte';
+import { m } from '$lib/paraglide/messages.js';
+
+let backfillResult: number | null = $state(null);
+let backfillLoading = $state(false);
+let backfillHashesResult: number | null = $state(null);
+let backfillHashesLoading = $state(false);
+
+type ImportStatus = {
+	state: 'IDLE' | 'RUNNING' | 'DONE' | 'FAILED';
+	message: string;
+	processed: number;
+	startedAt: string | null;
+};
+
+let importStatus: ImportStatus | null = $state(null);
+let pollInterval: ReturnType<typeof setInterval> | null = null;
+
+function startPolling() {
+	if (pollInterval) return;
+	pollInterval = setInterval(fetchImportStatus, 2000);
+}
+
+function stopPolling() {
+	if (pollInterval) {
+		clearInterval(pollInterval);
+		pollInterval = null;
+	}
+}
+
+async function fetchImportStatus() {
+	const res = await fetch('/api/admin/import-status');
+	if (res.ok) {
+		importStatus = await res.json();
+		if (importStatus!.state === 'RUNNING') {
+			startPolling();
+		} else {
+			stopPolling();
+		}
+	}
+}
+
+async function triggerImport() {
+	const res = await fetch('/api/admin/trigger-import', { method: 'POST' });
+	if (res.ok) {
+		importStatus = await res.json();
+		if (importStatus!.state === 'RUNNING') {
+			startPolling();
+		}
+	}
+}
+
+$effect(() => {
+	fetchImportStatus();
+});
+
+onDestroy(() => stopPolling());
+
+async function backfillVersions() {
+	backfillLoading = true;
+	backfillResult = null;
+	try {
+		const res = await fetch('/api/admin/backfill-versions', { method: 'POST' });
+		if (res.ok) {
+			const data = await res.json();
+			backfillResult = data.count;
+		}
+	} finally {
+		backfillLoading = false;
+	}
+}
+
+async function backfillFileHashes() {
+	backfillHashesLoading = true;
+	backfillHashesResult = null;
+	try {
+		const res = await fetch('/api/admin/backfill-file-hashes', { method: 'POST' });
+		if (res.ok) {
+			const data = await res.json();
+			backfillHashesResult = data.count;
+		}
+	} finally {
+		backfillHashesLoading = false;
+	}
+}
+</script>
+
+<div class="flex-1 overflow-y-auto p-6">
+	<div class="mx-auto max-w-2xl space-y-5">
+		<!-- Backfill versions -->
+		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
+			<h2 class="mb-1 font-sans text-sm font-bold text-ink">{m.admin_system_backfill_heading()}</h2>
+			<p class="mb-4 text-sm text-ink-2">{m.admin_system_backfill_description()}</p>
+			<button
+				onclick={backfillVersions}
+				disabled={backfillLoading}
+				class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80 disabled:cursor-not-allowed disabled:opacity-50"
+			>
+				{backfillLoading ? '…' : m.admin_system_backfill_btn()}
+			</button>
+			{#if backfillResult !== null}
+				<p class="mt-4 rounded-sm border border-green-200 bg-green-50 p-3 text-sm text-green-700">
+					{m.admin_system_backfill_success({ count: backfillResult })}
+				</p>
+			{/if}
+		</div>
+
+		<!-- Backfill file hashes -->
+		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
+			<h2 class="mb-1 font-sans text-sm font-bold text-ink">
+				{m.admin_system_backfill_hashes_heading()}
+			</h2>
+			<p class="mb-4 text-sm text-ink-2">{m.admin_system_backfill_hashes_description()}</p>
+			<button
+				onclick={backfillFileHashes}
+				disabled={backfillHashesLoading}
+				class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80 disabled:cursor-not-allowed disabled:opacity-50"
+			>
+				{backfillHashesLoading ? '…' : m.admin_system_backfill_hashes_btn()}
+			</button>
+			{#if backfillHashesResult !== null}
+				<p class="mt-4 rounded-sm border border-green-200 bg-green-50 p-3 text-sm text-green-700">
+					{m.admin_system_backfill_hashes_success({ count: backfillHashesResult })}
+				</p>
+			{/if}
+		</div>
+
+		<!-- Mass import -->
+		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
+			<h2 class="mb-1 font-sans text-sm font-bold text-ink">{m.admin_system_import_heading()}</h2>
+			<p class="mb-4 text-sm text-ink-2">{m.admin_system_import_description()}</p>
+
+			{#if importStatus?.state === 'RUNNING'}
+				<p class="text-sm text-ink-2">{m.admin_system_import_status_running()}</p>
+			{:else if importStatus?.state === 'DONE'}
+				<p class="mb-4 rounded-sm border border-green-200 bg-green-50 p-3 text-sm text-green-700">
+					{m.admin_system_import_status_done({ count: importStatus.processed })}
+				</p>
+				<button
+					data-import-trigger
+					onclick={triggerImport}
+					class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+				>
+					{m.admin_system_import_btn_retry()}
+				</button>
+			{:else if importStatus?.state === 'FAILED'}
+				<p class="mb-4 rounded-sm border border-red-200 bg-red-50 p-3 text-sm text-red-700">
+					{m.admin_system_import_status_failed({ message: importStatus.message })}
+				</p>
+				<button
+					data-import-trigger
+					onclick={triggerImport}
+					class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+				>
+					{m.admin_system_import_btn_retry()}
+				</button>
+			{:else}
+				{#if importStatus !== null}
+					<p class="mb-4 text-sm text-ink-2">{m.admin_system_import_status_idle()}</p>
+				{/if}
+				<button
+					data-import-trigger
+					onclick={triggerImport}
+					class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+				>
+					{m.admin_system_import_btn_start()}
+				</button>
+			{/if}
+		</div>
+	</div>
+</div>

frontend/src/routes/admin/system/page.svelte.spec.ts

@@ -0,0 +1,189 @@
+import { afterEach, beforeEach, describe, expect, it, vi, type MockInstance } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import Page from './+page.svelte';
+
+afterEach(cleanup);
+afterEach(() => vi.restoreAllMocks());
+
+describe('Admin system page', () => {
+	it('renders the backfill versions heading', async () => {
+		render(Page, {});
+		await expect.element(page.getByText(/Verlaufsdaten auffüllen/i)).toBeInTheDocument();
+	});
+
+	it('renders the backfill versions button', async () => {
+		render(Page, {});
+		await expect
+			.element(page.getByRole('button', { name: /jetzt auffüllen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('renders the backfill file hashes heading', async () => {
+		render(Page, {});
+		await expect
+			.element(page.getByRole('heading', { name: /Datei-Hashes berechnen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('renders the file hashes button', async () => {
+		render(Page, {});
+		await expect
+			.element(page.getByRole('button', { name: /Datei-Hashes berechnen/i }))
+			.toBeInTheDocument();
+	});
+});
+
+describe('Admin system page — mass import card', () => {
+	beforeEach(() => {
+		vi.stubGlobal(
+			'fetch',
+			vi.fn().mockResolvedValue({
+				ok: true,
+				json: async () => ({
+					state: 'IDLE',
+					message: 'Kein Import gestartet.',
+					processed: 0,
+					startedAt: null
+				})
+			})
+		);
+	});
+
+	it('renders the mass import heading', async () => {
+		render(Page, {});
+		await expect.element(page.getByText(/Massenimport/i)).toBeInTheDocument();
+	});
+
+	it('renders the start import button when idle', async () => {
+		render(Page, {});
+		await expect.element(page.getByRole('button', { name: /Import starten/i })).toBeInTheDocument();
+	});
+
+	it('shows idle status text', async () => {
+		render(Page, {});
+		await expect.element(page.getByText(/Kein Import gestartet/i)).toBeInTheDocument();
+	});
+
+	it('disables the start button and shows running state after click', async () => {
+		const fetchMock = vi
+			.fn()
+			// initial status fetch → IDLE
+			.mockResolvedValueOnce({
+				ok: true,
+				json: async () => ({
+					state: 'IDLE',
+					message: 'Kein Import gestartet.',
+					processed: 0,
+					startedAt: null
+				})
+			})
+			// trigger POST → returns RUNNING immediately
+			.mockResolvedValueOnce({
+				ok: true,
+				json: async () => ({
+					state: 'RUNNING',
+					message: 'Import läuft...',
+					processed: 0,
+					startedAt: '2026-01-01T10:00:00'
+				})
+			});
+		vi.stubGlobal('fetch', fetchMock);
+
+		render(Page, {});
+		await expect.element(page.getByRole('button', { name: /Import starten/i })).toBeInTheDocument();
+
+		document.querySelector<HTMLButtonElement>('[data-import-trigger]')!.click();
+
+		await expect.element(page.getByText(/Import läuft/i)).toBeInTheDocument();
+	});
+
+	it('shows done status and retry button after successful import', async () => {
+		vi.stubGlobal(
+			'fetch',
+			vi.fn().mockResolvedValue({
+				ok: true,
+				json: async () => ({
+					state: 'DONE',
+					message: 'Import abgeschlossen.',
+					processed: 42,
+					startedAt: '2026-01-01T10:00:00'
+				})
+			})
+		);
+		render(Page, {});
+		await expect.element(page.getByText(/42 Dokumente/i)).toBeInTheDocument();
+		await expect.element(page.getByRole('button', { name: /Erneut starten/i })).toBeInTheDocument();
+	});
+
+	it('shows failed status and retry button on error', async () => {
+		vi.stubGlobal(
+			'fetch',
+			vi.fn().mockResolvedValue({
+				ok: true,
+				json: async () => ({
+					state: 'FAILED',
+					message: 'Datei nicht gefunden.',
+					processed: 0,
+					startedAt: '2026-01-01T10:00:00'
+				})
+			})
+		);
+		render(Page, {});
+		await expect.element(page.getByText(/Datei nicht gefunden/i)).toBeInTheDocument();
+		await expect.element(page.getByRole('button', { name: /Erneut starten/i })).toBeInTheDocument();
+	});
+});
+
+// ─── Polling lifecycle ────────────────────────────────────────────────────────
+
+describe('Admin system page — polling lifecycle', () => {
+	let setIntervalSpy: MockInstance;
+	let clearIntervalSpy: MockInstance;
+
+	beforeEach(() => {
+		setIntervalSpy = vi.spyOn(globalThis, 'setInterval');
+		clearIntervalSpy = vi.spyOn(globalThis, 'clearInterval');
+	});
+
+	afterEach(() => {
+		setIntervalSpy.mockRestore();
+		clearIntervalSpy.mockRestore();
+	});
+
+	it('starts polling when initial status is RUNNING', async () => {
+		vi.stubGlobal(
+			'fetch',
+			vi.fn().mockResolvedValue({
+				ok: true,
+				json: async () => ({
+					state: 'RUNNING',
+					message: 'Import läuft...',
+					processed: 0,
+					startedAt: '2026-01-01T10:00:00'
+				})
+			})
+		);
+		render(Page, {});
+		await expect.element(page.getByText(/Import läuft/i)).toBeInTheDocument();
+		expect(setIntervalSpy).toHaveBeenCalled();
+	});
+
+	it('does not start polling when initial status is IDLE', async () => {
+		vi.stubGlobal(
+			'fetch',
+			vi.fn().mockResolvedValue({
+				ok: true,
+				json: async () => ({
+					state: 'IDLE',
+					message: '',
+					processed: 0,
+					startedAt: null
+				})
+			})
+		);
+		render(Page, {});
+		await expect.element(page.getByRole('button', { name: /Import starten/i })).toBeInTheDocument();
+		expect(setIntervalSpy).not.toHaveBeenCalled();
+	});
+});

frontend/src/routes/admin/tags/+layout.server.ts

@@ -0,0 +1,8 @@
+import { createApiClient } from '$lib/api.server';
+import type { LayoutServerLoad } from './$types';
+
+export const load: LayoutServerLoad = async ({ fetch }) => {
+	const api = createApiClient(fetch);
+	const result = await api.GET('/api/tags');
+	return { tags: result.data ?? [] };
+};

frontend/src/routes/admin/tags/+layout.svelte

@@ -0,0 +1,16 @@
+<script lang="ts">
+import { page } from '$app/state';
+import TagsListPanel from './TagsListPanel.svelte';
+
+let { data, children } = $props();
+
+const isAtListRoot = $derived(page.url.pathname === '/admin/tags');
+</script>
+
+<div class="{isAtListRoot ? 'flex' : 'hidden'} flex-shrink-0 md:flex">
+	<TagsListPanel tags={data.tags} />
+</div>
+
+<div class="{isAtListRoot ? 'hidden' : 'flex'} min-w-0 flex-1 flex-col overflow-hidden md:flex">
+	{@render children()}
+</div>

frontend/src/routes/admin/tags/+page.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+</script>
+
+<div class="flex flex-1 items-center justify-center p-8">
+	<p class="text-sm text-ink-3">{m.admin_tags_select_prompt()}</p>
+</div>

frontend/src/routes/admin/tags/TagsListPanel.svelte

@@ -0,0 +1,86 @@
+<script lang="ts">
+import { page } from '$app/state';
+import { m } from '$lib/paraglide/messages.js';
+
+type Tag = {
+	id: string;
+	name: string;
+};
+
+let {
+	tags,
+	autocollapse = false
+}: {
+	tags: Tag[];
+	autocollapse?: boolean;
+} = $props();
+
+let manualCollapse = $state(
+	typeof localStorage !== 'undefined' &&
+		localStorage.getItem('admin_tags_list_collapsed') === 'true'
+);
+const isCollapsed = $derived(autocollapse || manualCollapse);
+
+$effect(() => {
+	if (typeof localStorage !== 'undefined') {
+		localStorage.setItem('admin_tags_list_collapsed', String(manualCollapse));
+	}
+});
+</script>
+
+{#if isCollapsed}
+	<!-- Collapsed handle: 32px -->
+	<button
+		onclick={() => (manualCollapse = false)}
+		aria-label={m.admin_btn_expand_list()}
+		class="flex w-8 flex-shrink-0 flex-col items-center gap-2 border-r border-line bg-surface pt-2 hover:bg-muted"
+	>
+		<span class="text-sm font-bold text-ink-2">›</span>
+		<span
+			class="text-[8px] font-extrabold tracking-widest text-ink-3 uppercase"
+			style="writing-mode: vertical-rl; transform: rotate(180deg);"
+		>
+			{m.admin_tab_tags()}
+		</span>
+	</button>
+{:else}
+	<div
+		class="flex w-[200px] flex-shrink-0 flex-col overflow-hidden border-r border-line bg-surface"
+	>
+		<!-- Panel header -->
+		<div class="flex items-center justify-between border-b border-line px-3 py-2">
+			<span class="text-xs font-bold tracking-widest text-ink-3 uppercase">
+				{m.admin_tags_list_title()}
+			</span>
+			<button
+				onclick={() => (manualCollapse = true)}
+				aria-label={m.admin_btn_collapse_list()}
+				class="flex h-6 w-6 items-center justify-center rounded-sm text-xs font-bold text-ink-2 transition-colors hover:bg-muted"
+			>
+				‹
+			</button>
+		</div>
+
+		<!-- Scrollable tag list -->
+		<div class="flex-1 overflow-y-auto">
+			{#if tags.length === 0}
+				<p class="px-4 py-6 text-center text-xs text-ink-3">
+					{m.admin_tags_empty()}
+				</p>
+			{:else}
+				{#each tags as tag (tag.id)}
+					{@const isActive = page.url.pathname.startsWith('/admin/tags/' + tag.id)}
+					<a
+						href="/admin/tags/{tag.id}"
+						aria-current={isActive ? 'page' : undefined}
+						class="block border-l-2 px-3 py-2.5 transition-colors {isActive
+							? 'border-primary bg-primary/10 dark:bg-primary/15'
+							: 'border-transparent hover:bg-muted'}"
+					>
+						<div class="text-sm font-bold text-ink">{tag.name}</div>
+					</a>
+				{/each}
+			{/if}
+		</div>
+	</div>
+{/if}

frontend/src/routes/admin/tags/[id]/+page.server.ts

@@ -0,0 +1,44 @@
+import { error, fail, redirect } from '@sveltejs/kit';
+import type { PageServerLoad, Actions } from './$types';
+import { createApiClient } from '$lib/api.server';
+import { getErrorMessage } from '$lib/errors';
+
+export const load: PageServerLoad = async ({ params, parent }) => {
+	const { tags } = await parent();
+	const tag = tags.find((t: { id: string }) => t.id === params.id);
+	if (!tag) throw error(404, getErrorMessage('TAG_NOT_FOUND'));
+	return { tag };
+};
+
+export const actions: Actions = {
+	update: async ({ params, request, fetch }) => {
+		const data = await request.formData();
+		const api = createApiClient(fetch);
+
+		const result = await api.PUT('/api/tags/{id}', {
+			params: { path: { id: params.id } },
+			body: { name: data.get('name') as string }
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		return { success: true };
+	},
+
+	delete: async ({ params, fetch }) => {
+		const api = createApiClient(fetch);
+		const result = await api.DELETE('/api/tags/{id}', {
+			params: { path: { id: params.id } }
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		throw redirect(303, '/admin/tags');
+	}
+};

frontend/src/routes/admin/tags/[id]/+page.svelte

@@ -0,0 +1,159 @@
+<script lang="ts">
+import { enhance } from '$app/forms';
+import { beforeNavigate, goto } from '$app/navigation';
+import { m } from '$lib/paraglide/messages.js';
+
+let { data, form } = $props();
+
+let deleteConfirmName = $state('');
+const deleteEnabled = $derived(deleteConfirmName === data.tag.name);
+
+let isDirty = $state(false);
+let showUnsavedWarning = $state(false);
+let discardTarget: string | null = $state(null);
+
+beforeNavigate(({ cancel, to }) => {
+	if (isDirty) {
+		cancel();
+		showUnsavedWarning = true;
+		discardTarget = to?.url.href ?? null;
+	}
+});
+
+$effect(() => {
+	if (form?.success) {
+		isDirty = false;
+		showUnsavedWarning = false;
+	}
+});
+</script>
+
+<div class="flex flex-1 flex-col overflow-hidden">
+	<!-- Detail panel header -->
+	<div class="flex items-center border-b border-line px-5 py-3">
+		<a
+			href="/admin/tags"
+			class="mr-3 inline-flex items-center gap-1 text-xs text-ink-3 hover:text-ink md:hidden"
+		>
+			<svg
+				class="h-4 w-4"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="2"
+				aria-hidden="true"
+			>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
+			</svg>
+		</a>
+		<h2 class="flex-1 font-sans text-sm font-bold text-ink">
+			{m.admin_tag_edit_heading({ name: data.tag.name })}
+		</h2>
+	</div>
+
+	<!-- Scrollable body -->
+	<div class="flex-1 overflow-y-auto px-5 py-5">
+		{#if showUnsavedWarning}
+			<div
+				class="mb-5 flex items-center justify-between rounded border border-amber-200 bg-amber-50 p-3 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-300"
+			>
+				<span>{m.admin_unsaved_warning()}</span>
+				<button
+					type="button"
+					onclick={() => {
+						isDirty = false;
+						showUnsavedWarning = false;
+						if (discardTarget) goto(discardTarget);
+					}}
+					class="ml-4 shrink-0 font-sans text-xs font-bold tracking-widest text-amber-800 uppercase hover:text-amber-900 dark:text-amber-300"
+				>
+					{m.person_discard_changes()}
+				</button>
+			</div>
+		{/if}
+		{#if form?.success}
+			<div class="mb-5 rounded border border-green-200 bg-green-50 p-3 text-sm text-green-700">
+				{m.admin_tag_updated()}
+			</div>
+		{/if}
+		{#if form?.error}
+			<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
+				{form.error}
+			</div>
+		{/if}
+
+		<!-- Rename form -->
+		<form
+			id="edit-tag-form"
+			method="POST"
+			action="?/update"
+			use:enhance
+			oninput={() => {
+				isDirty = true;
+				showUnsavedWarning = false;
+			}}
+			class="mb-5"
+		>
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-3 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_col_name()}
+				</h3>
+				<p class="mb-3 text-xs text-amber-700">{m.admin_tags_warning()}</p>
+				<input
+					type="text"
+					name="name"
+					value={data.tag.name}
+					required
+					class="w-full rounded-sm border border-line bg-surface px-3 py-2 text-sm text-ink focus:ring-1 focus:ring-primary focus:outline-none"
+				/>
+			</div>
+		</form>
+
+		<!-- Danger zone -->
+		<div
+			class="rounded-sm border border-red-200 bg-red-50 p-5 dark:border-red-900 dark:bg-red-950/30"
+		>
+			<h3 class="mb-3 text-xs font-bold tracking-widest text-red-700 uppercase dark:text-red-400">
+				{m.btn_delete()}
+			</h3>
+			<p class="mb-3 text-xs text-red-700 dark:text-red-400">
+				{m.admin_tag_delete_confirm()}
+			</p>
+			<p class="mb-2 text-xs font-bold text-ink-2">
+				Gib <span class="font-mono">{data.tag.name}</span> zur Bestätigung ein:
+			</p>
+			<input
+				type="text"
+				bind:value={deleteConfirmName}
+				placeholder={data.tag.name}
+				class="mb-3 w-full rounded-sm border border-red-200 bg-white px-3 py-2 text-sm text-ink focus:ring-1 focus:ring-red-400 focus:outline-none"
+			/>
+			<form method="POST" action="?/delete" use:enhance>
+				<button
+					type="submit"
+					disabled={!deleteEnabled}
+					class="rounded-sm bg-red-600 px-4 py-2 font-sans text-xs font-bold tracking-widest text-white uppercase transition-opacity hover:opacity-80 disabled:cursor-not-allowed disabled:opacity-40"
+				>
+					{m.btn_delete()}
+				</button>
+			</form>
+		</div>
+	</div>
+
+	<!-- Docked footer -->
+	<div class="flex items-center justify-between border-t border-line bg-surface px-5 py-3">
+		<a
+			href="/admin/tags"
+			class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+		>
+			{m.btn_cancel()}
+		</a>
+		<button
+			type="submit"
+			form="edit-tag-form"
+			class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+		>
+			{m.btn_save()}
+		</button>
+	</div>
+</div>

frontend/src/routes/admin/tags/[id]/page.server.spec.ts

@@ -0,0 +1,85 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { actions } from './+page.server';
+
+const mockApi = {
+	PUT: vi.fn(),
+	DELETE: vi.fn()
+};
+
+vi.mock('$lib/api.server', () => ({
+	createApiClient: () => mockApi
+}));
+
+beforeEach(() => vi.clearAllMocks());
+
+// ─── update action ─────────────────────────────────────────────────────────────
+
+describe('tags/[id] — update action', () => {
+	it('returns success: true when API responds ok', async () => {
+		mockApi.PUT.mockResolvedValue({ response: { ok: true }, data: {} });
+
+		const formData = new FormData();
+		formData.set('name', 'Archiv');
+
+		const result = await actions.update({
+			params: { id: 't1' },
+			request: { formData: async () => formData },
+			fetch
+		} as never);
+
+		expect(result).toEqual({ success: true });
+	});
+
+	it('returns fail with error message when API responds not ok', async () => {
+		mockApi.PUT.mockResolvedValue({
+			response: { ok: false, status: 409 },
+			error: { code: 'TAG_CONFLICT' }
+		});
+
+		const formData = new FormData();
+		formData.set('name', 'Archiv');
+
+		const result = await actions.update({
+			params: { id: 't1' },
+			request: { formData: async () => formData },
+			fetch
+		} as never);
+
+		expect((result as { status: number }).status).toBe(409);
+	});
+});
+
+// ─── delete action ─────────────────────────────────────────────────────────────
+
+describe('tags/[id] — delete action', () => {
+	it('redirects to /admin/tags on successful delete', async () => {
+		mockApi.DELETE.mockResolvedValue({ response: { ok: true } });
+
+		let redirectUrl: string | null = null;
+		try {
+			await actions.delete({
+				params: { id: 't1' },
+				fetch
+			} as never);
+		} catch (e: unknown) {
+			const r = e as { location?: string; status?: number };
+			redirectUrl = r.location ?? null;
+		}
+
+		expect(redirectUrl).toBe('/admin/tags');
+	});
+
+	it('returns fail with error message when delete API responds not ok', async () => {
+		mockApi.DELETE.mockResolvedValue({
+			response: { ok: false, status: 403 },
+			error: { code: 'FORBIDDEN' }
+		});
+
+		const result = await actions.delete({
+			params: { id: 't1' },
+			fetch
+		} as never);
+
+		expect((result as { status: number }).status).toBe(403);
+	});
+});

frontend/src/routes/admin/tags/[id]/page.svelte.spec.ts

@@ -0,0 +1,93 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import Page from './+page.svelte';
+
+vi.mock('$app/forms', () => ({ enhance: () => () => {} }));
+vi.mock('$app/navigation', () => ({ beforeNavigate: vi.fn(), goto: vi.fn() }));
+
+import { beforeNavigate, goto } from '$app/navigation';
+
+const baseTag = { id: 't1', name: 'Familie' };
+const baseData = { tag: baseTag };
+
+afterEach(cleanup);
+
+// ─── Rendering ────────────────────────────────────────────────────────────────
+
+describe('Admin edit tag page – rendering', () => {
+	it('renders the heading with tag name', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect.element(page.getByText(/Schlagwort: Familie/i)).toBeInTheDocument();
+	});
+
+	it('pre-fills the name input', async () => {
+		render(Page, { data: baseData, form: null });
+		const input = document.querySelector<HTMLInputElement>('input[name="name"]');
+		expect(input?.value).toBe('Familie');
+	});
+
+	it('renders the cancel link pointing to /admin/tags', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect
+			.element(page.getByRole('link', { name: /Abbrechen/i }))
+			.toHaveAttribute('href', '/admin/tags');
+	});
+
+	it('delete button is disabled until tag name is typed in confirm field', async () => {
+		render(Page, { data: baseData, form: null });
+		const deleteBtn = document.querySelector<HTMLButtonElement>('button[type="submit"]');
+		expect(deleteBtn?.disabled).toBe(true);
+	});
+});
+
+// ─── Unsaved-changes guard ────────────────────────────────────────────────────
+
+describe('Admin edit tag page – unsaved-changes guard', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	it('does not show unsaved warning initially', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).not.toBeInTheDocument();
+	});
+
+	it('cancels navigation and shows warning when rename form is dirty', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="name"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/tags/t2') } });
+
+		expect(cancel).toHaveBeenCalled();
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).toBeInTheDocument();
+	});
+
+	it('does not cancel navigation when form is clean', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/tags/t2') } });
+
+		expect(cancel).not.toHaveBeenCalled();
+	});
+
+	it('discard button calls goto with the target URL', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="name"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		callback({ cancel: vi.fn(), to: { url: new URL('http://localhost/admin/tags/t2') } });
+
+		await page.getByRole('button', { name: /verwerfen/i }).click();
+
+		expect(vi.mocked(goto)).toHaveBeenCalledWith('http://localhost/admin/tags/t2');
+	});
+});

frontend/src/routes/admin/tags/layout.server.spec.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { load } from './+layout.server';
+
+vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
+
+import { createApiClient } from '$lib/api.server';
+
+function mockApi(tags: unknown[]) {
+	vi.mocked(createApiClient).mockReturnValue({
+		GET: vi.fn().mockResolvedValueOnce({ response: { ok: true }, data: tags })
+	} as ReturnType<typeof createApiClient>);
+}
+
+beforeEach(() => vi.clearAllMocks());
+
+describe('admin/tags layout load', () => {
+	it('returns the tags list', async () => {
+		mockApi([
+			{ id: 't1', name: 'Familie' },
+			{ id: 't2', name: 'Urlaub' }
+		]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.tags).toHaveLength(2);
+		expect(result.tags[0].name).toBe('Familie');
+	});
+
+	it('returns an empty array when the API returns nothing', async () => {
+		mockApi([]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.tags).toEqual([]);
+	});
+
+	it('calls GET /api/tags', async () => {
+		const mockGet = vi.fn().mockResolvedValue({ response: { ok: true }, data: [] });
+		vi.mocked(createApiClient).mockReturnValue({ GET: mockGet } as ReturnType<
+			typeof createApiClient
+		>);
+		await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(mockGet).toHaveBeenCalledWith('/api/tags');
+	});
+});

frontend/src/routes/admin/tags/layout.svelte.spec.ts

@@ -0,0 +1,97 @@
+import { afterEach, beforeEach, describe, it, expect, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import TagsListPanel from './TagsListPanel.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { pathname: '/admin/tags/t1' } }
+}));
+
+afterEach(cleanup);
+
+const tags = [
+	{ id: 't1', name: 'Familie' },
+	{ id: 't2', name: 'Urlaub' },
+	{ id: 't3', name: 'Schule' }
+];
+
+describe('TagsListPanel — header', () => {
+	it('renders the panel title', async () => {
+		render(TagsListPanel, { tags });
+		await expect.element(page.getByText(/Alle Schlagworte/i)).toBeInTheDocument();
+	});
+});
+
+describe('TagsListPanel — tag items', () => {
+	it('renders each tag name', async () => {
+		render(TagsListPanel, { tags });
+		await expect.element(page.getByRole('link', { name: /familie/i })).toBeInTheDocument();
+		await expect.element(page.getByRole('link', { name: /urlaub/i })).toBeInTheDocument();
+	});
+
+	it('each tag links to /admin/tags/[id]', async () => {
+		const { container } = render(TagsListPanel, { tags });
+		const links = container.querySelectorAll<HTMLAnchorElement>('a[href^="/admin/tags/t"]');
+		expect(links.length).toBe(3);
+		expect(links[0].getAttribute('href')).toBe('/admin/tags/t1');
+	});
+});
+
+describe('TagsListPanel — active state', () => {
+	it('marks the active tag link with aria-current=page', async () => {
+		render(TagsListPanel, { tags });
+		await expect
+			.element(page.getByRole('link', { name: /familie/i }))
+			.toHaveAttribute('aria-current', 'page');
+	});
+
+	it('does not mark inactive tag links with aria-current', async () => {
+		render(TagsListPanel, { tags });
+		await expect
+			.element(page.getByRole('link', { name: /urlaub/i }))
+			.not.toHaveAttribute('aria-current');
+	});
+});
+
+describe('TagsListPanel — empty state', () => {
+	it('shows empty state when tags array is empty', async () => {
+		render(TagsListPanel, { tags: [] });
+		await expect.element(page.getByText(/keine schlagworte/i)).toBeInTheDocument();
+	});
+});
+
+// ─── Collapse toggle ──────────────────────────────────────────────────────────
+
+describe('TagsListPanel — collapse toggle', () => {
+	beforeEach(() => localStorage.removeItem('admin_tags_list_collapsed'));
+
+	it('renders a collapse button with aria-label', async () => {
+		render(TagsListPanel, { tags });
+		await expect
+			.element(page.getByRole('button', { name: /Liste einklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('clicking collapse shows the expand handle', async () => {
+		render(TagsListPanel, { tags });
+		await page.getByRole('button', { name: /Liste einklappen/i }).click();
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('autocollapse prop starts the panel in collapsed state', async () => {
+		render(TagsListPanel, { tags, autocollapse: true });
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('persists collapse state using the tags-specific localStorage key', async () => {
+		const setSpy = vi.spyOn(Storage.prototype, 'setItem');
+		render(TagsListPanel, { tags });
+		document.querySelector<HTMLButtonElement>('[aria-label="Liste einklappen"]')!.click();
+		expect(setSpy).toHaveBeenCalledWith('admin_tags_list_collapsed', 'true');
+		setSpy.mockRestore();
+	});
+});

frontend/src/routes/admin/users/+layout.server.ts

@@ -0,0 +1,8 @@
+import { createApiClient } from '$lib/api.server';
+import type { LayoutServerLoad } from './$types';
+
+export const load: LayoutServerLoad = async ({ fetch }) => {
+	const api = createApiClient(fetch);
+	const result = await api.GET('/api/users');
+	return { users: result.data ?? [] };
+};

frontend/src/routes/admin/users/+layout.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+import { page } from '$app/state';
+import UsersListPanel from './UsersListPanel.svelte';
+
+let { data, children } = $props();
+
+// Auto-collapse list when user opens the create form (gives max form space on tablet)
+const autoCollapse = $derived(page.url.pathname === '/admin/users/new');
+
+// Mobile: show only the relevant panel at a time
+const isAtListRoot = $derived(page.url.pathname === '/admin/users');
+</script>
+
+<!-- List panel: full-screen on mobile at list root; always visible at md+ -->
+<div class="{isAtListRoot ? 'flex' : 'hidden'} flex-shrink-0 md:flex">
+	<UsersListPanel users={data.users} autocollapse={autoCollapse} />
+</div>
+
+<!-- Detail panel: full-screen on mobile when not at list root; always visible at md+ -->
+<div class="{isAtListRoot ? 'hidden' : 'flex'} min-w-0 flex-1 flex-col overflow-hidden md:flex">
+	{@render children()}
+</div>

frontend/src/routes/admin/users/+page.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+</script>
+
+<div class="flex flex-1 items-center justify-center p-8">
+	<p class="text-sm text-ink-3">{m.admin_users_select_prompt()}</p>
+</div>

frontend/src/routes/admin/users/UsersListPanel.svelte

@@ -0,0 +1,149 @@
+<script lang="ts">
+import { page } from '$app/state';
+import { m } from '$lib/paraglide/messages.js';
+
+type Group = {
+	id: string;
+	name: string;
+	permissions: string[];
+};
+
+type User = {
+	id: string;
+	username: string;
+	firstName: string | null;
+	lastName: string | null;
+	groups: Group[];
+};
+
+let {
+	users,
+	autocollapse = false
+}: {
+	users: User[];
+	autocollapse?: boolean;
+} = $props();
+
+let searchQuery = $state('');
+let manualCollapse = $state(
+	typeof localStorage !== 'undefined' &&
+		localStorage.getItem('admin_users_list_collapsed') === 'true'
+);
+const isCollapsed = $derived(autocollapse || manualCollapse);
+
+$effect(() => {
+	if (typeof localStorage !== 'undefined') {
+		localStorage.setItem('admin_users_list_collapsed', String(manualCollapse));
+	}
+});
+
+const filtered = $derived(
+	searchQuery.trim() === ''
+		? users
+		: users.filter((u) =>
+				[u.username, u.firstName, u.lastName]
+					.filter(Boolean)
+					.some((v) => v!.toLowerCase().includes(searchQuery.toLowerCase()))
+			)
+);
+</script>
+
+{#if isCollapsed}
+	<!-- Collapsed handle: 32px -->
+	<button
+		onclick={() => (manualCollapse = false)}
+		aria-label={m.admin_btn_expand_list()}
+		class="flex w-8 flex-shrink-0 flex-col items-center gap-2 border-r border-line bg-surface pt-2 hover:bg-muted"
+	>
+		<span class="text-sm font-bold text-ink-2">›</span>
+		<span
+			class="text-[8px] font-extrabold tracking-widest text-ink-3 uppercase"
+			style="writing-mode: vertical-rl; transform: rotate(180deg);"
+		>
+			{m.admin_tab_users()}
+		</span>
+	</button>
+{:else}
+	<div
+		class="flex w-[200px] flex-shrink-0 flex-col overflow-hidden border-r border-line bg-surface"
+	>
+		<!-- Panel header -->
+		<div class="flex items-center justify-between border-b border-line px-3 py-2">
+			<span class="text-xs font-bold tracking-widest text-ink-3 uppercase">
+				{m.admin_users_list_title()}
+			</span>
+			<div class="flex items-center gap-1">
+				<a
+					href="/admin/users/new"
+					class="inline-flex items-center gap-1 rounded-sm px-2 py-1 text-xs font-medium text-ink-2 transition-colors hover:bg-muted hover:text-ink"
+					title={m.admin_btn_new_user()}
+					aria-label={m.admin_btn_new_user()}
+				>
+					<svg
+						class="h-3.5 w-3.5"
+						fill="none"
+						viewBox="0 0 24 24"
+						stroke="currentColor"
+						stroke-width="2.5"
+						aria-hidden="true"
+					>
+						<path stroke-linecap="round" stroke-linejoin="round" d="M12 4v16m8-8H4" />
+					</svg>
+				</a>
+				<button
+					onclick={() => (manualCollapse = true)}
+					aria-label={m.admin_btn_collapse_list()}
+					class="flex h-6 w-6 items-center justify-center rounded-sm text-xs font-bold text-ink-2 transition-colors hover:bg-muted"
+				>
+					‹
+				</button>
+			</div>
+		</div>
+
+		<!-- Search -->
+		<div class="border-b border-line px-3 py-2">
+			<input
+				type="search"
+				bind:value={searchQuery}
+				placeholder={m.admin_users_search_placeholder()}
+				class="w-full rounded-sm border border-line bg-surface px-2 py-1.5 text-sm text-ink placeholder:text-ink-3 focus:ring-1 focus:ring-primary focus:outline-none"
+			/>
+		</div>
+
+		<!-- Scrollable user list -->
+		<div class="flex-1 overflow-y-auto">
+			{#if filtered.length === 0}
+				<p class="px-4 py-6 text-center text-xs text-ink-3">
+					{m.admin_users_empty()}
+				</p>
+			{:else}
+				{#each filtered as user (user.id)}
+					{@const isActive = page.url.pathname.startsWith('/admin/users/' + user.id)}
+					{@const fullName =
+						[user.firstName, user.lastName].filter(Boolean).join(' ') || null}
+					<a
+						href="/admin/users/{user.id}"
+						aria-current={isActive ? 'page' : undefined}
+						class="block border-l-2 px-3 py-2.5 transition-colors {isActive
+							? 'border-primary bg-primary/10 dark:bg-primary/15'
+							: 'border-transparent hover:bg-muted'}"
+					>
+						<div class="text-sm font-bold text-ink">{user.username}</div>
+						{#if fullName}
+							<div class="mt-0.5 text-xs text-ink-3">{fullName}</div>
+						{/if}
+						{#if user.groups.length > 0}
+							<div class="mt-1 flex flex-wrap gap-1">
+								{#each user.groups as group (group.id)}
+									<span class="rounded-sm bg-muted px-1.5 py-0.5 text-[10px] text-ink-3">
+										{group.name}
+									</span>
+								{/each}
+							</div>
+						{/if}
+					</a>
+				{/each}
+			{/if}
+		</div>
+	</div>
+{/if}

frontend/src/routes/admin/users/[id]/+page.server.ts

@@ -1,4 +1,4 @@
-import { error, fail } from '@sveltejs/kit';
+import { error, fail, redirect } from '@sveltejs/kit';
 import type { PageServerLoad, Actions } from './$types';
 import { createApiClient } from '$lib/api.server';
 import { getErrorMessage } from '$lib/errors';
@@ -63,5 +63,19 @@ export const actions: Actions = {
 		}
 
 		return { success: true };
+	},
+
+	delete: async ({ params, fetch }) => {
+		const api = createApiClient(fetch);
+		const result = await api.DELETE('/api/users/{id}', {
+			params: { path: { id: params.id } }
+		});
+
+		if (!result.response.ok) {
+			const code = (result.error as unknown as { code?: string })?.code;
+			return fail(result.response.status, { error: getErrorMessage(code) });
+		}
+
+		throw redirect(303, '/admin/users');
 	}
 };

frontend/src/routes/admin/users/[id]/+page.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
 import { enhance } from '$app/forms';
+import { beforeNavigate, goto } from '$app/navigation';
 import { m } from '$lib/paraglide/messages.js';
 import UserProfileSection from '$lib/components/user/UserProfileSection.svelte';
 import UserGroupsSection from '$lib/components/user/UserGroupsSection.svelte';
@@ -8,87 +9,156 @@ import UserPasswordSection from '$lib/components/user/UserPasswordSection.svelte
 let { data, form } = $props();
 
 const selectedGroupIds = $derived(data.editUser.groups?.map((g: { id: string }) => g.id) ?? []);
+
+let isDirty = $state(false);
+let showUnsavedWarning = $state(false);
+let discardTarget: string | null = $state(null);
+
+beforeNavigate(({ cancel, to }) => {
+	if (isDirty) {
+		cancel();
+		showUnsavedWarning = true;
+		discardTarget = to?.url.href ?? null;
+	}
+});
+
+$effect(() => {
+	if (form?.success) {
+		isDirty = false;
+		showUnsavedWarning = false;
+	}
+});
 </script>
 
-<div class="mx-auto max-w-3xl px-4 py-8 sm:px-6 lg:px-8">
-	<a
-		href="/admin"
-		class="group mb-4 inline-flex items-center text-xs font-bold tracking-widest text-ink-2 uppercase transition-colors hover:text-ink"
-	>
-		<svg
-			class="mr-2 h-4 w-4 transform transition-transform group-hover:-translate-x-1"
-			fill="none"
-			viewBox="0 0 24 24"
-			stroke="currentColor"
-			stroke-width="2"
+<div class="flex flex-1 flex-col overflow-hidden">
+	<!-- Detail panel header -->
+	<div class="flex items-center border-b border-line px-5 py-3">
+		<a
+			href="/admin/users"
+			class="mr-3 inline-flex items-center gap-1 text-xs text-ink-3 hover:text-ink md:hidden"
 		>
-			<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
-		</svg>
-		{m.btn_back_to_overview()}
-	</a>
-
-	<h1 class="mb-6 font-serif text-3xl font-bold text-ink">
-		{m.admin_user_edit_heading({ username: data.editUser.username })}
-	</h1>
-
-	{#if form?.success}
-		<div class="mb-5 rounded border border-green-200 bg-green-50 p-3 text-sm text-green-700">
-			{m.admin_user_updated()}
-		</div>
-	{/if}
-	{#if form?.error}
-		<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
-			{form.error}
-		</div>
-	{/if}
-
-	<form method="POST" use:enhance class="space-y-6">
-		<!-- Profile card -->
-		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
-			<h2 class="mb-5 text-xs font-bold tracking-widest text-ink-3 uppercase">
-				{m.profile_section_personal()}
-			</h2>
-			<UserProfileSection
-				firstName={data.editUser.firstName ?? ''}
-				lastName={data.editUser.lastName ?? ''}
-				birthDate={data.editUser.birthDate ?? ''}
-				email={data.editUser.email ?? ''}
-				contact={data.editUser.contact ?? ''}
-			/>
-		</div>
-
-		<!-- Groups card -->
-		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
-			<h2 class="mb-5 text-xs font-bold tracking-widest text-ink-3 uppercase">
-				{m.admin_col_groups()}
-			</h2>
-			<UserGroupsSection groups={data.groups} selectedGroupIds={selectedGroupIds} />
-		</div>
-
-		<!-- Password card -->
-		<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
-			<h2 class="mb-5 text-xs font-bold tracking-widest text-ink-3 uppercase">
-				{m.admin_label_new_password_optional()}
-			</h2>
-			<UserPasswordSection />
-		</div>
-
-		<!-- Save bar -->
-		<div
-			class="sticky bottom-0 z-10 -mx-4 flex items-center justify-between border-t border-line bg-surface px-6 py-4 shadow-[0_-2px_8px_rgba(0,0,0,0.06)]"
-		>
-			<a
-				href="/admin"
-				class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+			<svg
+				class="h-4 w-4"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="2"
+				aria-hidden="true"
 			>
-				{m.btn_cancel()}
-			</a>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
+			</svg>
+		</a>
+		<h2 class="flex-1 font-sans text-sm font-bold text-ink">
+			{m.admin_user_edit_heading({ username: data.editUser.username })}
+		</h2>
+		<form
+			method="POST"
+			action="?/delete"
+			use:enhance={({ cancel }) => {
+				if (!confirm(m.admin_user_delete_confirm({ username: data.editUser.username }))) {
+					cancel();
+				}
+				return async ({ update }) => {
+					await update();
+				};
+			}}
+		>
 			<button
 				type="submit"
-				class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+				class="rounded-sm border border-red-200 bg-red-50 px-3 py-1 font-sans text-xs font-bold tracking-widest text-red-700 uppercase transition-colors hover:bg-red-100 dark:border-red-900 dark:bg-red-950/30 dark:text-red-400"
 			>
-				{m.btn_save()}
+				{m.btn_delete()}…
 			</button>
-		</div>
-	</form>
+		</form>
+	</div>
+
+	<!-- Scrollable body -->
+	<div class="flex-1 overflow-y-auto px-5 py-5">
+		{#if showUnsavedWarning}
+			<div
+				class="mb-5 flex items-center justify-between rounded border border-amber-200 bg-amber-50 p-3 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-300"
+			>
+				<span>{m.admin_unsaved_warning()}</span>
+				<button
+					type="button"
+					onclick={() => {
+						isDirty = false;
+						showUnsavedWarning = false;
+						if (discardTarget) goto(discardTarget);
+					}}
+					class="ml-4 shrink-0 font-sans text-xs font-bold tracking-widest text-amber-800 uppercase hover:text-amber-900 dark:text-amber-300"
+				>
+					{m.person_discard_changes()}
+				</button>
+			</div>
+		{/if}
+		{#if form?.success}
+			<div class="mb-5 rounded border border-green-200 bg-green-50 p-3 text-sm text-green-700">
+				{m.admin_user_updated()}
+			</div>
+		{/if}
+		{#if form?.error}
+			<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
+				{form.error}
+			</div>
+		{/if}
+
+		<form
+			id="edit-user-form"
+			method="POST"
+			use:enhance
+			oninput={() => {
+				isDirty = true;
+				showUnsavedWarning = false;
+			}}
+			class="space-y-5"
+		>
+			<!-- Profile card -->
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.profile_section_personal()}
+				</h3>
+				<UserProfileSection
+					firstName={data.editUser.firstName ?? ''}
+					lastName={data.editUser.lastName ?? ''}
+					birthDate={data.editUser.birthDate ?? ''}
+					email={data.editUser.email ?? ''}
+					contact={data.editUser.contact ?? ''}
+				/>
+			</div>
+
+			<!-- Groups card -->
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_col_groups()}
+				</h3>
+				<UserGroupsSection groups={data.groups} selectedGroupIds={selectedGroupIds} />
+			</div>
+
+			<!-- Password card -->
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_label_new_password_optional()}
+				</h3>
+				<UserPasswordSection />
+			</div>
+		</form>
+	</div>
+
+	<!-- Docked footer -->
+	<div class="flex items-center justify-between border-t border-line bg-surface px-5 py-3">
+		<a
+			href="/admin/users"
+			class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+		>
+			{m.btn_cancel()}
+		</a>
+		<button
+			type="submit"
+			form="edit-user-form"
+			class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+		>
+			{m.btn_save()}
+		</button>
+	</div>
 </div>

frontend/src/routes/admin/users/[id]/page.svelte.spec.ts

@@ -1,9 +1,12 @@
-import { afterEach, describe, expect, it, vi } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import { cleanup, render } from 'vitest-browser-svelte';
 import { page } from 'vitest/browser';
 import Page from './+page.svelte';
 
 vi.mock('$app/forms', () => ({ enhance: () => () => {} }));
+vi.mock('$app/navigation', () => ({ beforeNavigate: vi.fn(), goto: vi.fn() }));
+
+import { beforeNavigate, goto } from '$app/navigation';
 
 const groups = [
 	{ id: 'g1', name: 'Editoren', permissions: ['WRITE_ALL'] },
@@ -96,7 +99,7 @@ describe('Admin edit user page – rendering', () => {
 
 	it('includes pre-selected group ids in FormData at submit time (guards against groupIds being empty)', async () => {
 		render(Page, { data: baseData, form: null });
-		const form = document.querySelector('form')!;
+		const form = document.querySelector<HTMLFormElement>('form#edit-user-form')!;
 		const formData = new FormData(form);
 		expect(formData.getAll('groupIds')).toContain('g1');
 		expect(formData.getAll('groupIds')).not.toContain('g2');
@@ -110,11 +113,11 @@ describe('Admin edit user page – rendering', () => {
 		});
 	});
 
-	it('cancel link points to /admin', async () => {
+	it('cancel link points to /admin/users', async () => {
 		render(Page, { data: baseData, form: null });
 		await expect
 			.element(page.getByRole('link', { name: /Abbrechen/i }))
-			.toHaveAttribute('href', '/admin');
+			.toHaveAttribute('href', '/admin/users');
 	});
 
 	it('renders the save button', async () => {
@@ -141,3 +144,72 @@ describe('Admin edit user page – feedback', () => {
 		await expect.element(page.getByText(/Änderungen gespeichert/i)).not.toBeInTheDocument();
 	});
 });
+
+// ─── Unsaved-changes guard ────────────────────────────────────────────────────
+
+describe('Admin edit user page – unsaved-changes guard', () => {
+	beforeEach(() => vi.clearAllMocks());
+
+	it('does not show unsaved warning initially', async () => {
+		render(Page, { data: baseData, form: null });
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).not.toBeInTheDocument();
+	});
+
+	it('cancels navigation and shows warning when form is dirty', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="firstName"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/users/u2') } });
+
+		expect(cancel).toHaveBeenCalled();
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).toBeInTheDocument();
+	});
+
+	it('does not cancel navigation when form is clean', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/users/u2') } });
+
+		expect(cancel).not.toHaveBeenCalled();
+	});
+
+	it('discard button calls goto with the target URL', async () => {
+		render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="firstName"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		callback({ cancel: vi.fn(), to: { url: new URL('http://localhost/admin/users/u2') } });
+
+		await page.getByRole('button', { name: /verwerfen/i }).click();
+
+		expect(vi.mocked(goto)).toHaveBeenCalledWith('http://localhost/admin/users/u2');
+	});
+
+	it('clears dirty state when form saves successfully', async () => {
+		const { rerender } = render(Page, { data: baseData, form: null });
+		const [callback] = vi.mocked(beforeNavigate).mock.calls[0];
+
+		document
+			.querySelector<HTMLInputElement>('input[name="firstName"]')!
+			.dispatchEvent(new InputEvent('input', { bubbles: true }));
+
+		callback({ cancel: vi.fn(), to: { url: new URL('http://localhost/admin/users/u2') } });
+		await expect.element(page.getByText(/ungespeicherte Änderungen/i)).toBeInTheDocument();
+
+		await rerender({ data: baseData, form: { success: true } });
+
+		const cancel = vi.fn();
+		callback({ cancel, to: { url: new URL('http://localhost/admin/users/u2') } });
+		expect(cancel).not.toHaveBeenCalled();
+	});
+});

frontend/src/routes/admin/users/layout.server.spec.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { load } from './+layout.server';
+
+vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
+
+import { createApiClient } from '$lib/api.server';
+
+function mockApi(users: unknown[]) {
+	vi.mocked(createApiClient).mockReturnValue({
+		GET: vi.fn().mockResolvedValueOnce({ response: { ok: true }, data: users })
+	} as ReturnType<typeof createApiClient>);
+}
+
+beforeEach(() => vi.clearAllMocks());
+
+describe('admin/users layout load', () => {
+	it('returns the users list', async () => {
+		mockApi([
+			{ id: 'u1', username: 'alice' },
+			{ id: 'u2', username: 'bob' }
+		]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.users).toHaveLength(2);
+		expect(result.users[0].username).toBe('alice');
+	});
+
+	it('returns an empty array when the API returns nothing', async () => {
+		mockApi([]);
+		const result = await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(result.users).toEqual([]);
+	});
+
+	it('calls GET /api/users', async () => {
+		const mockGet = vi.fn().mockResolvedValue({ response: { ok: true }, data: [] });
+		vi.mocked(createApiClient).mockReturnValue({ GET: mockGet } as ReturnType<
+			typeof createApiClient
+		>);
+		await load({ fetch: vi.fn() as unknown as typeof fetch });
+		expect(mockGet).toHaveBeenCalledWith('/api/users');
+	});
+});

frontend/src/routes/admin/users/layout.svelte.spec.ts

@@ -0,0 +1,140 @@
+import { afterEach, beforeEach, describe, it, expect, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import UsersListPanel from './UsersListPanel.svelte';
+
+vi.mock('$app/state', () => ({
+	page: { url: { pathname: '/admin/users/u1' } }
+}));
+
+afterEach(cleanup);
+
+const users = [
+	{
+		id: 'u1',
+		username: 'reader',
+		firstName: 'Lea',
+		lastName: 'Leserin',
+		groups: [{ id: 'g1', name: 'Leser', permissions: ['READ_ALL'] }]
+	},
+	{
+		id: 'u2',
+		username: 'admin',
+		firstName: null,
+		lastName: null,
+		groups: [{ id: 'g2', name: 'Admins', permissions: ['ADMIN'] }]
+	}
+];
+
+describe('UsersListPanel — header', () => {
+	it('renders the panel title', async () => {
+		render(UsersListPanel, { users });
+		await expect.element(page.getByText(/Alle Benutzer/i)).toBeInTheDocument();
+	});
+
+	it('renders a new-user link pointing to /admin/users/new', async () => {
+		render(UsersListPanel, { users });
+		await expect
+			.element(page.getByRole('link', { name: /neuer benutzer/i }))
+			.toHaveAttribute('href', '/admin/users/new');
+	});
+
+	it('renders a search input', async () => {
+		render(UsersListPanel, { users });
+		await expect.element(page.getByRole('searchbox')).toBeInTheDocument();
+	});
+});
+
+describe('UsersListPanel — user items', () => {
+	it('renders each username', async () => {
+		render(UsersListPanel, { users });
+		await expect.element(page.getByRole('link', { name: /reader/i })).toBeInTheDocument();
+		await expect.element(page.getByRole('link', { name: /admin/i })).toBeInTheDocument();
+	});
+
+	it('each user links to /admin/users/[id]', async () => {
+		const { container } = render(UsersListPanel, { users });
+		const links = container.querySelectorAll<HTMLAnchorElement>('a[href^="/admin/users/u"]');
+		expect(links.length).toBe(2);
+		expect(links[0].getAttribute('href')).toBe('/admin/users/u1');
+		expect(links[1].getAttribute('href')).toBe('/admin/users/u2');
+	});
+
+	it('shows full name as subtitle when available', async () => {
+		render(UsersListPanel, { users });
+		await expect.element(page.getByText('Lea Leserin')).toBeInTheDocument();
+	});
+
+	it('shows group name chip', async () => {
+		render(UsersListPanel, { users });
+		await expect.element(page.getByText('Leser', { exact: true })).toBeInTheDocument();
+	});
+});
+
+describe('UsersListPanel — active state', () => {
+	it('marks the active user link with aria-current=page', async () => {
+		render(UsersListPanel, { users });
+		await expect
+			.element(page.getByRole('link', { name: /reader/i }))
+			.toHaveAttribute('aria-current', 'page');
+	});
+
+	it('does not mark the inactive user link with aria-current', async () => {
+		render(UsersListPanel, { users });
+		await expect
+			.element(page.getByRole('link', { name: /admin/i }))
+			.not.toHaveAttribute('aria-current');
+	});
+});
+
+describe('UsersListPanel — empty state', () => {
+	it('shows empty state message when users array is empty', async () => {
+		render(UsersListPanel, { users: [] });
+		await expect.element(page.getByText(/keine benutzer/i)).toBeInTheDocument();
+	});
+});
+
+// ─── Collapse toggle ──────────────────────────────────────────────────────────
+
+describe('UsersListPanel — collapse toggle', () => {
+	beforeEach(() => localStorage.removeItem('admin_users_list_collapsed'));
+
+	it('renders a collapse button with aria-label', async () => {
+		render(UsersListPanel, { users });
+		await expect
+			.element(page.getByRole('button', { name: /Liste einklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('clicking collapse shows the expand handle', async () => {
+		render(UsersListPanel, { users });
+		await page.getByRole('button', { name: /Liste einklappen/i }).click();
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('clicking expand handle restores the full panel', async () => {
+		render(UsersListPanel, { users });
+		await page.getByRole('button', { name: /Liste einklappen/i }).click();
+		await page.getByRole('button', { name: /Liste ausklappen/i }).click();
+		await expect
+			.element(page.getByRole('button', { name: /Liste einklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('autocollapse prop starts the panel in collapsed state', async () => {
+		render(UsersListPanel, { users, autocollapse: true });
+		await expect
+			.element(page.getByRole('button', { name: /Liste ausklappen/i }))
+			.toBeInTheDocument();
+	});
+
+	it('persists collapse state using the users-specific localStorage key', async () => {
+		const setSpy = vi.spyOn(Storage.prototype, 'setItem');
+		render(UsersListPanel, { users });
+		document.querySelector<HTMLButtonElement>('[aria-label="Liste einklappen"]')!.click();
+		expect(setSpy).toHaveBeenCalledWith('admin_users_list_collapsed', 'true');
+		setSpy.mockRestore();
+	});
+});

frontend/src/routes/admin/users/new/+page.server.ts

@@ -40,6 +40,6 @@ export const actions: Actions = {
 			return fail(result.response.status, { error: getErrorMessage(code) });
 		}
 
-		throw redirect(303, '/admin');
+		throw redirect(303, '/admin/users');
 	}
 };

frontend/src/routes/admin/users/new/+page.svelte

@@ -1,71 +1,119 @@
 <script lang="ts">
 import { enhance } from '$app/forms';
+import { beforeNavigate, goto } from '$app/navigation';
 import { m } from '$lib/paraglide/messages.js';
 import UserProfileSection from '$lib/components/user/UserProfileSection.svelte';
 import UserGroupsSection from '$lib/components/user/UserGroupsSection.svelte';
 import AccountSection from './AccountSection.svelte';
 
 let { data, form } = $props();
+
+let isDirty = $state(false);
+let showUnsavedWarning = $state(false);
+let discardTarget: string | null = $state(null);
+
+beforeNavigate(({ cancel, to }) => {
+	if (isDirty) {
+		cancel();
+		showUnsavedWarning = true;
+		discardTarget = to?.url.href ?? null;
+	}
+});
 </script>
 
-<div class="mx-auto max-w-3xl px-4 py-8 sm:px-6 lg:px-8">
-	<a
-		href="/admin"
-		class="group mb-4 inline-flex items-center text-xs font-bold tracking-widest text-ink-2 uppercase transition-colors hover:text-ink"
-	>
-		<svg
-			class="mr-2 h-4 w-4 transform transition-transform group-hover:-translate-x-1"
-			fill="none"
-			viewBox="0 0 24 24"
-			stroke="currentColor"
-			stroke-width="2"
+<div class="flex flex-1 flex-col overflow-hidden">
+	<!-- Detail panel header -->
+	<div class="flex items-center border-b border-line px-5 py-3">
+		<a
+			href="/admin/users"
+			class="mr-3 inline-flex items-center gap-1 text-xs text-ink-3 hover:text-ink md:hidden"
 		>
-			<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
-		</svg>
-		{m.btn_back_to_overview()}
-	</a>
+			<svg
+				class="h-4 w-4"
+				fill="none"
+				viewBox="0 0 24 24"
+				stroke="currentColor"
+				stroke-width="2"
+				aria-hidden="true"
+			>
+				<path stroke-linecap="round" stroke-linejoin="round" d="M15 19l-7-7 7-7" />
+			</svg>
+		</a>
+		<h2 class="flex-1 font-sans text-sm font-bold text-ink">{m.admin_user_new_heading()}</h2>
+	</div>
 
-	<h1 class="mb-6 font-serif text-3xl font-bold text-ink">{m.admin_user_new_heading()}</h1>
+	<!-- Scrollable body -->
+	<div class="flex-1 overflow-y-auto px-5 py-5">
+		{#if showUnsavedWarning}
+			<div
+				class="mb-5 flex items-center justify-between rounded border border-amber-200 bg-amber-50 p-3 text-sm text-amber-800 dark:border-amber-800 dark:bg-amber-950/40 dark:text-amber-300"
+			>
+				<span>{m.admin_unsaved_warning()}</span>
+				<button
+					type="button"
+					onclick={() => {
+						isDirty = false;
+						showUnsavedWarning = false;
+						if (discardTarget) goto(discardTarget);
+					}}
+					class="ml-4 shrink-0 font-sans text-xs font-bold tracking-widest text-amber-800 uppercase hover:text-amber-900 dark:text-amber-300"
+				>
+					{m.person_discard_changes()}
+				</button>
+			</div>
+		{/if}
+		{#if form?.error}
+			<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
+				{form.error}
+			</div>
+		{/if}
 
-	{#if form?.error}
-		<div class="mb-5 rounded border border-red-200 bg-red-50 p-3 text-sm text-red-700">
-			{form.error}
-		</div>
-	{/if}
-
-	<div class="rounded-sm border border-line bg-surface p-6 shadow-sm">
-		<form method="POST" use:enhance class="space-y-5">
-			<AccountSection />
+		<form
+			id="new-user-form"
+			method="POST"
+			use:enhance
+			oninput={() => {
+				isDirty = true;
+				showUnsavedWarning = false;
+			}}
+			class="space-y-5"
+		>
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<AccountSection />
+			</div>
 
 			<!-- Profile -->
-			<h2 class="pt-2 text-xs font-bold tracking-widest text-ink-3 uppercase">
-				{m.profile_section_personal()}
-			</h2>
-			<UserProfileSection />
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.profile_section_personal()}
+				</h3>
+				<UserProfileSection />
+			</div>
 
 			<!-- Groups -->
-			<h2 class="pt-2 text-xs font-bold tracking-widest text-ink-3 uppercase">
-				{m.admin_col_groups()}
-			</h2>
-			<UserGroupsSection groups={data.groups} />
-
-			<!-- Save bar -->
-			<div
-				class="mt-4 flex items-center justify-between rounded-sm border border-line bg-surface px-6 py-4 shadow-sm"
-			>
-				<a
-					href="/admin"
-					class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
-				>
-					{m.btn_cancel()}
-				</a>
-				<button
-					type="submit"
-					class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
-				>
-					{m.btn_create()}
-				</button>
+			<div class="rounded-sm border border-line bg-surface p-5 shadow-sm">
+				<h3 class="mb-4 text-xs font-bold tracking-widest text-ink-3 uppercase">
+					{m.admin_col_groups()}
+				</h3>
+				<UserGroupsSection groups={data.groups} />
 			</div>
 		</form>
 	</div>
+
+	<!-- Docked footer -->
+	<div class="flex items-center justify-between border-t border-line bg-surface px-5 py-3">
+		<a
+			href="/admin/users"
+			class="font-sans text-xs font-bold tracking-widest text-ink-2 uppercase hover:text-ink"
+		>
+			{m.btn_cancel()}
+		</a>
+		<button
+			type="submit"
+			form="new-user-form"
+			class="rounded-sm bg-primary px-5 py-2 font-sans text-xs font-bold tracking-widest text-primary-fg uppercase transition-opacity hover:opacity-80"
+		>
+			{m.btn_create()}
+		</button>
+	</div>
 </div>

frontend/src/routes/admin/users/new/page.svelte.spec.ts

@@ -33,18 +33,11 @@ describe('Admin new user page – rendering', () => {
 		await expect.element(page.getByText('Admins')).toBeInTheDocument();
 	});
 
-	it('cancel link points to /admin', async () => {
+	it('cancel link points to /admin/users', async () => {
 		render(Page, { data: baseData, form: null });
 		await expect
 			.element(page.getByRole('link', { name: /Abbrechen/i }))
-			.toHaveAttribute('href', '/admin');
-	});
-
-	it('back link points to /admin', async () => {
-		render(Page, { data: baseData, form: null });
-		await expect
-			.element(page.getByRole('link', { name: /Zurück/i }))
-			.toHaveAttribute('href', '/admin');
+			.toHaveAttribute('href', '/admin/users');
 	});
 
 	it('renders the create button', async () => {

frontend/src/routes/korrespondenz/+page.server.ts

@@ -0,0 +1,82 @@
+import { error } from '@sveltejs/kit';
+import type { components } from '$lib/generated/api';
+import { createApiClient } from '$lib/api.server';
+import { getErrorMessage } from '$lib/errors';
+
+export async function load({ url, fetch, locals }) {
+	const senderId = url.searchParams.get('senderId') || '';
+	const receiverId = url.searchParams.get('receiverId') || '';
+	const from = url.searchParams.get('from') || '';
+	const to = url.searchParams.get('to') || '';
+	const dir = url.searchParams.get('dir') || 'DESC';
+
+	const canWrite =
+		(locals.user as { groups?: { permissions: string[] }[] } | undefined)?.groups?.some((g) =>
+			g.permissions.includes('WRITE_ALL')
+		) ?? false;
+
+	const api = createApiClient(fetch);
+
+	let documents: components['schemas']['Document'][] = [];
+	let senderName = '';
+	let receiverName = '';
+
+	const requests: Promise<void>[] = [];
+
+	if (senderId) {
+		requests.push(
+			api
+				.GET('/api/documents/conversation', {
+					params: {
+						query: {
+							senderId,
+							receiverId: receiverId || undefined,
+							dir,
+							from: from || undefined,
+							to: to || undefined
+						}
+					}
+				})
+				.then((result) => {
+					if (!result.response.ok) {
+						const code = (result.error as unknown as { code?: string })?.code;
+						throw error(result.response.status, getErrorMessage(code));
+					}
+					documents = result.data ?? [];
+				})
+		);
+
+		requests.push(
+			api.GET('/api/persons/{id}', { params: { path: { id: senderId } } }).then((result) => {
+				if (!result.response.ok) {
+					const code = (result.error as unknown as { code?: string })?.code;
+					throw error(result.response.status, getErrorMessage(code));
+				}
+				const p = result.data as { firstName: string; lastName: string } | undefined;
+				if (p) senderName = `${p.firstName} ${p.lastName}`;
+			})
+		);
+	}
+
+	if (receiverId) {
+		requests.push(
+			api.GET('/api/persons/{id}', { params: { path: { id: receiverId } } }).then((result) => {
+				if (!result.response.ok) {
+					const code = (result.error as unknown as { code?: string })?.code;
+					throw error(result.response.status, getErrorMessage(code));
+				}
+				const p = result.data as { firstName: string; lastName: string } | undefined;
+				if (p) receiverName = `${p.firstName} ${p.lastName}`;
+			})
+		);
+	}
+
+	await Promise.all(requests);
+
+	return {
+		documents,
+		canWrite,
+		initialValues: { senderName, receiverName },
+		filters: { senderId, receiverId, from, to, dir }
+	};
+}

frontend/src/routes/korrespondenz/+page.svelte

@@ -0,0 +1,140 @@
+<script lang="ts">
+import { goto } from '$app/navigation';
+import { untrack } from 'svelte';
+import { SvelteURLSearchParams } from 'svelte/reactivity';
+import CorrespondenzPersonBar from './CorrespondenzPersonBar.svelte';
+import CorrespondenzFilterControls from './CorrespondenzFilterControls.svelte';
+import SinglePersonHintBar from './SinglePersonHintBar.svelte';
+import ConversationTimeline from './ConversationTimeline.svelte';
+import CorrespondenzEmptyState from './CorrespondenzEmptyState.svelte';
+import { m } from '$lib/paraglide/messages.js';
+
+let { data } = $props();
+
+// Filter values are local $state so swapPersons/toggleSort can mutate them before goto.
+// They are initialised once from server data and never re-synced — navigation replaces
+// the page component, so each load gets a fresh init.
+let senderId = $state(untrack(() => data.filters.senderId));
+let receiverId = $state(untrack(() => data.filters.receiverId));
+let fromDate = $state(untrack(() => data.filters.from));
+let toDate = $state(untrack(() => data.filters.to));
+let sortDir = $state(untrack(() => data.filters.dir));
+
+// Names are pure reads of server data — no local mutation needed.
+const senderName = $derived(data.initialValues.senderName);
+const receiverName = $derived(data.initialValues.receiverName);
+
+// Side-effect only: persist the resolved sender to localStorage once the name is available.
+$effect(() => {
+	if (data.filters.senderId && data.initialValues.senderName) {
+		persistRecentPerson(data.filters.senderId, data.initialValues.senderName);
+	}
+});
+
+const isSinglePerson = $derived(!!senderId && !receiverId);
+
+const RECENT_STORAGE_KEY = 'korrespondenz_recent_persons';
+const MAX_RECENT = 5;
+
+function persistRecentPerson(id: string, name: string) {
+	if (!id) return;
+	try {
+		const raw = localStorage.getItem(RECENT_STORAGE_KEY);
+		const existing: { id: string; name: string }[] = raw ? JSON.parse(raw) : [];
+		const filtered = existing.filter((p) => p.id !== id);
+		const updated = [{ id, name }, ...filtered].slice(0, MAX_RECENT);
+		localStorage.setItem(RECENT_STORAGE_KEY, JSON.stringify(updated));
+	} catch {
+		// localStorage unavailable — silently ignore
+	}
+}
+
+function applyFilters() {
+	const params = new SvelteURLSearchParams();
+	if (senderId) params.set('senderId', senderId);
+	if (receiverId) params.set('receiverId', receiverId);
+	if (fromDate) params.set('from', fromDate);
+	if (toDate) params.set('to', toDate);
+	params.set('dir', sortDir);
+	goto(`/korrespondenz?${params.toString()}`, { keepFocus: true });
+}
+
+function toggleSort() {
+	sortDir = sortDir === 'DESC' ? 'ASC' : 'DESC';
+	applyFilters();
+}
+
+function swapPersons() {
+	const tmp = senderId;
+	senderId = receiverId;
+	receiverId = tmp;
+	applyFilters();
+}
+
+function selectPerson(id: string) {
+	if (!id) {
+		document.querySelector<HTMLInputElement>('#senderId-search')?.focus();
+		return;
+	}
+	senderId = id;
+	receiverId = '';
+	applyFilters();
+}
+</script>
+
+<!-- Strips — pulled up to negate main's py-6 top padding so they sit flush -->
+<div class="-mt-6">
+	<!-- Strip: Row 1 — full width, no container -->
+	<CorrespondenzPersonBar
+		bind:senderId={senderId}
+		bind:receiverId={receiverId}
+		initialSenderName={data.initialValues.senderName}
+		initialReceiverName={data.initialValues.receiverName}
+		onapplyFilters={applyFilters}
+		onswapPersons={swapPersons}
+	/>
+
+	<!-- Strip: Row 2 — full width -->
+	<CorrespondenzFilterControls
+		senderId={senderId}
+		bind:fromDate={fromDate}
+		bind:toDate={toDate}
+		bind:sortDir={sortDir}
+		documentCount={data.documents.length}
+		onapplyFilters={applyFilters}
+		ontoggleSort={toggleSort}
+	/>
+
+	<!-- Single-person hint bar -->
+	{#if isSinglePerson}
+		<SinglePersonHintBar
+			senderName={senderName}
+			fromDate={fromDate || undefined}
+			toDate={toDate || undefined}
+			sortDir={sortDir}
+		/>
+	{/if}
+</div>
+
+<!-- Content area with padding -->
+<div class="px-[18px] py-[14px]">
+	{#if !senderId}
+		<CorrespondenzEmptyState onSelectPerson={selectPerson} />
+	{:else if data.documents.length === 0}
+		<div
+			class="flex flex-col items-center justify-center rounded-sm border border-line bg-muted py-24 text-center shadow-sm"
+		>
+			<p class="font-serif text-ink">{m.conv_no_results_heading()}</p>
+			<p class="mt-2 text-sm text-ink-3">{m.conv_no_results_text()}</p>
+		</div>
+	{:else}
+		<ConversationTimeline
+			documents={data.documents}
+			senderId={senderId}
+			receiverId={receiverId}
+			canWrite={data.canWrite}
+			senderName={senderName}
+			receiverName={receiverName}
+		/>
+	{/if}
+</div>

frontend/src/routes/korrespondenz/ConversationFilterBar.svelte

@@ -0,0 +1,142 @@
+<script lang="ts">
+import PersonTypeahead from '$lib/components/PersonTypeahead.svelte';
+import { m } from '$lib/paraglide/messages.js';
+
+let {
+	senderId = $bindable(''),
+	receiverId = $bindable(''),
+	fromDate = $bindable(''),
+	toDate = $bindable(''),
+	sortDir = $bindable('DESC'),
+	initialSenderName = '',
+	initialReceiverName = '',
+	onapplyFilters,
+	ontoggleSort,
+	onswapPersons
+}: {
+	senderId?: string;
+	receiverId?: string;
+	fromDate?: string;
+	toDate?: string;
+	sortDir?: string;
+	initialSenderName?: string;
+	initialReceiverName?: string;
+	onapplyFilters: () => void;
+	ontoggleSort: () => void;
+	onswapPersons: () => void;
+} = $props();
+</script>
+
+<div class="relative z-20 mb-10 border border-line bg-surface p-8 shadow-sm">
+	<div class="mb-6 grid grid-cols-1 items-end gap-4 md:grid-cols-[1fr_auto_1fr] md:gap-6">
+		<!-- Sender -->
+		<div
+			class="relative z-30 [&_input]:border-line [&_input]:py-2.5 [&_input]:focus:border-ink [&_input]:focus:ring-ink [&_label]:mb-2 [&_label]:text-xs [&_label]:font-bold [&_label]:tracking-widest [&_label]:text-ink-2 [&_label]:uppercase"
+		>
+			<PersonTypeahead
+				name="senderId"
+				label={m.conv_label_person_a()}
+				bind:value={senderId}
+				initialName={initialSenderName}
+				restrictToCorrespondentsOf={receiverId || undefined}
+				onchange={() => onapplyFilters()}
+			/>
+		</div>
+
+		<!-- Swap button -->
+		<div class="{senderId && receiverId ? 'flex' : 'hidden md:flex'} items-end">
+			<button
+				data-testid="conv-swap-btn"
+				onclick={onswapPersons}
+				class="flex w-full items-center justify-center gap-2 border border-line px-3 py-2.5 text-xs font-bold tracking-widest text-ink uppercase transition-colors hover:bg-primary hover:text-primary-fg md:w-auto {senderId &&
+				receiverId
+					? ''
+					: 'invisible'}"
+				title={m.conv_swap_btn()}
+			>
+				<svg
+					class="h-4 w-4 flex-shrink-0 md:rotate-90"
+					fill="none"
+					stroke="currentColor"
+					viewBox="0 0 24 24"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						stroke-width="2"
+						d="M7 16V4m0 0L3 8m4-4l4 4M17 8v12m0 0l4-4m-4 4l-4-4"
+					></path>
+				</svg>
+				<span class="md:hidden">{m.conv_swap_btn()}</span>
+			</button>
+		</div>
+
+		<!-- Receiver -->
+		<div
+			class="relative z-30 [&_input]:border-line [&_input]:py-2.5 [&_input]:focus:border-ink [&_input]:focus:ring-ink [&_label]:mb-2 [&_label]:text-xs [&_label]:font-bold [&_label]:tracking-widest [&_label]:text-ink-2 [&_label]:uppercase"
+		>
+			<PersonTypeahead
+				name="receiverId"
+				label={m.conv_label_person_b()}
+				bind:value={receiverId}
+				initialName={initialReceiverName}
+				restrictToCorrespondentsOf={senderId || undefined}
+				onchange={() => onapplyFilters()}
+			/>
+		</div>
+	</div>
+
+	<div class="relative z-10 grid grid-cols-1 items-end gap-6 md:grid-cols-3">
+		<!-- Date From -->
+		<div>
+			<label
+				for="dateFrom"
+				class="mb-2 block text-xs font-bold tracking-widest text-ink-2 uppercase"
+				>{m.conv_label_from()}</label
+			>
+			<input
+				id="dateFrom"
+				type="date"
+				bind:value={fromDate}
+				onchange={() => onapplyFilters()}
+				class="block w-full border-line py-2.5 text-sm shadow-sm focus:border-ink focus:ring-ink"
+			/>
+		</div>
+
+		<!-- Date To -->
+		<div>
+			<label for="dateTo" class="mb-2 block text-xs font-bold tracking-widest text-ink-2 uppercase"
+				>{m.conv_label_to()}</label
+			>
+			<input
+				id="dateTo"
+				type="date"
+				bind:value={toDate}
+				onchange={() => onapplyFilters()}
+				class="block w-full border-line py-2.5 text-sm shadow-sm focus:border-ink focus:ring-ink"
+			/>
+		</div>
+
+		<!-- Sort Toggle -->
+		<div>
+			<button
+				onclick={ontoggleSort}
+				class="flex h-[42px] w-full items-center justify-center border border-line text-xs font-bold tracking-wide text-ink uppercase transition-colors hover:bg-primary hover:text-primary-fg"
+			>
+				<span class="mr-2">{m.conv_sort_label()}</span>
+				<span>{sortDir === 'DESC' ? m.conv_sort_newest() : m.conv_sort_oldest()}</span>
+				<svg
+					class="ml-2 h-4 w-4 transform {sortDir === 'ASC'
+						? 'rotate-180'
+						: ''} transition-transform"
+					fill="none"
+					stroke="currentColor"
+					viewBox="0 0 24 24"
+				>
+					<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"
+					></path>
+				</svg>
+			</button>
+		</div>
+	</div>
+</div>

frontend/src/routes/korrespondenz/ConversationTimeline.svelte

@@ -0,0 +1,180 @@
+<script lang="ts">
+import { formatDate } from '$lib/utils/date';
+import { m } from '$lib/paraglide/messages.js';
+
+interface Props {
+	documents: {
+		id: string;
+		title?: string;
+		originalFilename: string;
+		documentDate?: string;
+		location?: string;
+		status: string;
+		sender?: { id: string; firstName: string; lastName: string } | null;
+		receivers?: { id: string; firstName: string; lastName: string }[];
+	}[];
+	senderId: string;
+	receiverId?: string;
+	canWrite: boolean;
+	senderName?: string;
+	receiverName?: string;
+}
+
+let { documents, senderId, receiverId, canWrite, senderName, receiverName }: Props = $props();
+
+const enrichedDocuments = $derived(
+	documents.map((doc, i) => {
+		const year = doc.documentDate ? new Date(doc.documentDate).getFullYear() : null;
+		const prevYear =
+			i > 0 && documents[i - 1].documentDate
+				? new Date(documents[i - 1].documentDate!).getFullYear()
+				: null;
+		const isOut = doc.sender?.id === senderId;
+		return { doc, year, showYearDivider: year !== null && year !== prevYear, isOut };
+	})
+);
+
+const countsByYear = $derived(
+	documents.reduce((acc, d) => {
+		if (d.documentDate) {
+			const y = new Date(d.documentDate).getFullYear();
+			acc.set(y, (acc.get(y) ?? 0) + 1);
+		}
+		return acc;
+	}, new Map<number, number>())
+);
+
+const outCount = $derived(documents.filter((d) => d.sender?.id === senderId).length);
+const inCount = $derived(documents.length - outCount);
+const outPct = $derived(documents.length > 0 ? (outCount / documents.length) * 100 : 0);
+
+const isBilateral = $derived(!!senderId && !!receiverId);
+
+const shortSenderName = $derived(senderName?.split(' ')[0] ?? senderName ?? '');
+const shortReceiverName = $derived(receiverName?.split(' ')[0] ?? receiverName ?? '');
+
+function statusDotClass(status: string): string {
+	const map: Record<string, string> = {
+		PLACEHOLDER: 'bg-brand-sand',
+		UPLOADED: 'bg-brand-mint',
+		TRANSCRIBED: 'bg-brand-mint',
+		REVIEWED: 'bg-brand-navy/70',
+		ARCHIVED: 'bg-brand-navy'
+	};
+	return map[status] ?? 'bg-brand-sand';
+}
+
+function otherPartyName(doc: (typeof documents)[number]): string {
+	if (doc.sender?.id === senderId) {
+		const r = doc.receivers?.[0];
+		return r ? `${r.firstName} ${r.lastName}` : m.conv_no_party();
+	}
+	return doc.sender ? `${doc.sender.firstName} ${doc.sender.lastName}` : m.conv_no_party();
+}
+
+const newDocUrl = $derived(
+	`/documents/new?senderId=${encodeURIComponent(senderId)}${receiverId ? `&receiverId=${encodeURIComponent(receiverId)}` : ''}`
+);
+</script>
+
+{#if isBilateral && documents.length > 0}
+	<div
+		class="flex flex-col gap-1 border-b border-line bg-muted px-[18px] py-2"
+		role="img"
+		aria-label="Briefverteilung in diesem Zeitraum: {outCount} von {senderName ?? ''}, {inCount} von {receiverName ?? ''}"
+	>
+		<div class="flex justify-between text-sm font-bold">
+			<span class="text-primary">{outCount} von {shortSenderName} →</span>
+			<span class="text-accent">{inCount} von {shortReceiverName} ←</span>
+		</div>
+		<div class="flex h-[5px] overflow-hidden rounded-full bg-line">
+			<div class="h-full bg-primary transition-all" style="width: {outPct}%"></div>
+			<div class="h-full bg-accent transition-all" style="width: {100 - outPct}%"></div>
+		</div>
+	</div>
+{/if}
+
+<div class="overflow-hidden rounded-sm border border-line bg-surface">
+	{#each enrichedDocuments as { doc, year, showYearDivider, isOut } (doc.id)}
+		{#if showYearDivider && year !== null}
+			<div
+				data-testid="year-divider"
+				class="flex items-baseline gap-3 border-t-2 border-b border-line bg-muted px-[14px] py-[8px]"
+			>
+				<span class="text-2xl font-black tracking-tight text-primary">{year}</span>
+				<span class="text-sm font-bold text-ink-3">{countsByYear.get(year) ?? 0} Briefe</span>
+			</div>
+		{/if}
+
+		<a
+			href="/documents/{doc.id}"
+			aria-label="{doc.title || doc.originalFilename}, {doc.documentDate
+				? formatDate(doc.documentDate)
+				: ''}"
+			class="group flex min-h-[44px] cursor-pointer items-center gap-[9px] border-b border-l-[3px] border-line-2 px-[14px] py-[10px] transition-colors last:border-b-0 hover:bg-muted"
+			class:border-l-primary={isOut}
+			class:border-l-accent={!isOut}
+		>
+			<span
+				class="w-[16px] shrink-0 text-sm font-black"
+				class:text-primary={isOut}
+				class:text-accent={!isOut}
+				aria-hidden="true"
+			>
+				{isOut ? '→' : '←'}
+			</span>
+
+			<div class="min-w-0 flex-1">
+				<div class="mb-[2px] truncate text-sm font-bold text-ink">
+					{doc.title || doc.originalFilename}
+				</div>
+				<div class="flex items-center gap-[5px] text-sm text-ink-3">
+					<span>{doc.documentDate ? formatDate(doc.documentDate) : '—'}</span>
+					{#if doc.location}
+						<span class="text-line">·</span>
+						<span>{doc.location}</span>
+					{/if}
+					{#if !receiverId}
+						<span class="text-line">·</span>
+						<span>{otherPartyName(doc)}</span>
+					{/if}
+					<span
+						class="ml-[3px] h-[6px] w-[6px] shrink-0 rounded-full {statusDotClass(doc.status)}"
+						title={doc.status}
+					></span>
+				</div>
+			</div>
+
+			<span
+				class="shrink-0 text-sm text-ink-3 opacity-0 transition-opacity group-hover:opacity-100"
+				aria-hidden="true">›</span
+			>
+		</a>
+	{/each}
+
+	{#if canWrite}
+		<div class="flex justify-end border-t border-line px-[14px] py-[6px]">
+			<a
+				href={newDocUrl}
+				data-testid="conv-new-doc-link"
+				class="inline-flex items-center gap-1 text-xs font-bold text-primary/50 transition-colors hover:text-primary"
+			>
+				<svg
+					class="h-3 w-3"
+					fill="none"
+					stroke="currentColor"
+					viewBox="0 0 24 24"
+					aria-hidden="true"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						stroke-width="2"
+						d="M12 4v16m8-8H4"
+					/>
+				</svg>
+				{m.conv_new_doc_link()}
+			</a>
+		</div>
+	{/if}
+</div>

frontend/src/routes/korrespondenz/CorrespondentSuggestionsDropdown.svelte

@@ -0,0 +1,112 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+
+interface Correspondent {
+	id: string;
+	firstName: string;
+	lastName: string;
+}
+
+interface Props {
+	correspondents: Correspondent[];
+	loading: boolean;
+	senderName: string;
+	onselect: (id: string) => void;
+	onclose: () => void;
+}
+
+let { correspondents, loading, senderName, onselect, onclose }: Props = $props();
+
+function clickOutside(node: HTMLElement) {
+	const handleClick = (event: MouseEvent) => {
+		if (node && !node.contains(event.target as Node) && !event.defaultPrevented) {
+			onclose();
+		}
+	};
+	document.addEventListener('click', handleClick, true);
+	return {
+		destroy() {
+			document.removeEventListener('click', handleClick, true);
+		}
+	};
+}
+
+function getOptionElements(container: HTMLElement): HTMLElement[] {
+	return Array.from(container.querySelectorAll<HTMLElement>('[role="option"]'));
+}
+
+function handleKeydown(event: KeyboardEvent, container: HTMLElement) {
+	const options = getOptionElements(container);
+	const focused = document.activeElement as HTMLElement;
+	const idx = options.indexOf(focused);
+
+	if (event.key === 'ArrowDown') {
+		event.preventDefault();
+		const next = options[idx + 1] ?? options[0];
+		next?.focus();
+	} else if (event.key === 'ArrowUp') {
+		event.preventDefault();
+		const prev = options[idx - 1] ?? options[options.length - 1];
+		prev?.focus();
+	} else if (event.key === 'Escape') {
+		onclose();
+	}
+}
+
+function getInitials(person: Correspondent): string {
+	return `${person.firstName.charAt(0)}${person.lastName.charAt(0)}`.toUpperCase();
+}
+</script>
+
+<div
+	use:clickOutside
+	role="listbox"
+	tabindex="-1"
+	aria-label={m.conv_suggestions_heading()}
+	class="absolute top-full right-0 left-0 z-30 mt-1 rounded-sm border border-line bg-surface shadow-lg"
+	onkeydown={(e) => handleKeydown(e, e.currentTarget as HTMLElement)}
+>
+	<!-- Heading -->
+	<div class="px-3 pt-2 pb-1 text-[10px] font-bold tracking-widest text-ink-3 uppercase">
+		{m.conv_suggestions_heading()}
+	</div>
+
+	<!-- Correspondent rows -->
+	{#if !loading}
+		{#each correspondents as person (person.id)}
+			<div
+				role="option"
+				aria-selected="false"
+				tabindex="0"
+				class="flex cursor-pointer items-center gap-2 px-3 py-2 text-sm text-ink hover:bg-muted focus:bg-muted focus:outline-none"
+				onclick={() => onselect(person.id)}
+				onkeydown={(e) => e.key === 'Enter' && onselect(person.id)}
+			>
+				<!-- Avatar with initials -->
+				<span
+					class="flex h-4 w-4 shrink-0 items-center justify-center rounded-full bg-primary text-[10px] font-bold text-primary-fg"
+					aria-hidden="true"
+				>
+					{getInitials(person)}
+				</span>
+				<!-- Svelte auto-escapes — do not use {@html} here. -->
+				{person.lastName}, {person.firstName}
+			</div>
+		{/each}
+	{/if}
+
+	<!-- Separator -->
+	<div class="mt-1 border-t border-line"></div>
+
+	<!-- "Alle Korrespondenten" row -->
+	<div
+		role="option"
+		aria-selected="false"
+		tabindex="0"
+		class="flex cursor-pointer items-center gap-2 px-3 py-2 text-sm text-ink hover:bg-muted focus:bg-muted focus:outline-none"
+		onclick={() => onselect('')}
+		onkeydown={(e) => e.key === 'Enter' && onselect('')}
+	>
+		{m.conv_suggestions_all_label({ name: senderName })}
+	</div>
+</div>

frontend/src/routes/korrespondenz/CorrespondenzEmptyState.svelte

@@ -0,0 +1,120 @@
+<script lang="ts">
+import { onMount } from 'svelte';
+import { m } from '$lib/paraglide/messages.js';
+
+interface RecentPerson {
+	id: string;
+	name: string;
+}
+
+interface Props {
+	onSelectPerson: (id: string) => void;
+}
+
+const { onSelectPerson }: Props = $props();
+
+let recentPersons = $state<RecentPerson[]>([]);
+
+onMount(() => {
+	try {
+		const raw = localStorage.getItem('korrespondenz_recent_persons');
+		if (raw) {
+			// Svelte auto-escapes firstName/lastName — do not use {@html} with these values
+			recentPersons = JSON.parse(raw) as RecentPerson[];
+		}
+	} catch {
+		recentPersons = [];
+	}
+});
+</script>
+
+<div class="mx-auto flex max-w-lg flex-col items-center gap-5 py-12 text-center">
+	<!-- Icon circle -->
+	<div class="rounded-full bg-muted p-5">
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			width="36"
+			height="36"
+			viewBox="0 0 24 24"
+			fill="none"
+			stroke="currentColor"
+			stroke-width="1.5"
+			stroke-linecap="round"
+			stroke-linejoin="round"
+			class="text-primary"
+			aria-hidden="true"
+		>
+			<rect x="2" y="4" width="20" height="16" rx="2" />
+			<path d="M2 7l10 7 10-7" />
+		</svg>
+	</div>
+
+	<!-- Heading -->
+	<h2 class="font-serif text-xl font-black text-ink">{m.conv_empty_heading()}</h2>
+
+	<!-- Subtext -->
+	<p class="max-w-sm text-base text-ink-3">
+		{m.conv_empty_text()}
+	</p>
+
+	<!-- Search input placeholder (visual only — clicking focuses Person A typeahead above) -->
+	<button
+		type="button"
+		data-testid="conv-empty-search"
+		aria-label={m.conv_empty_search_placeholder()}
+		onclick={() => onSelectPerson('')}
+		class="flex h-10 w-full max-w-sm items-center rounded border border-line bg-muted px-4 text-sm text-ink-3 italic transition-colors hover:border-primary"
+	>
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			width="14"
+			height="14"
+			viewBox="0 0 24 24"
+			fill="none"
+			stroke="currentColor"
+			stroke-width="2"
+			stroke-linecap="round"
+			stroke-linejoin="round"
+			class="mr-2 shrink-0"
+			aria-hidden="true"
+		>
+			<circle cx="11" cy="11" r="8" />
+			<path d="m21 21-4.35-4.35" />
+		</svg>
+		{m.conv_empty_search_placeholder()}
+	</button>
+
+	<!-- Recent persons — only shown when localStorage has entries -->
+	{#if recentPersons.length > 0}
+		<!-- Divider -->
+		<div class="flex w-full max-w-sm items-center gap-2">
+			<div class="flex-1 border-t border-line"></div>
+			<span class="text-xs font-bold tracking-wider text-ink-3 uppercase">oder</span>
+			<div class="flex-1 border-t border-line"></div>
+		</div>
+
+		<div class="flex w-full max-w-sm flex-col items-center gap-3">
+			<span class="text-xs font-bold tracking-widest text-ink-3 uppercase">
+				{m.conv_empty_recent_label()}
+			</span>
+			<div class="flex flex-wrap justify-center gap-2">
+				{#each recentPersons as person (person.id)}
+					<!-- TODO: allow clearing recent history -->
+					<button
+						type="button"
+						onclick={() => onSelectPerson(person.id)}
+						class="flex items-center gap-2 rounded-full border border-line bg-surface px-4 py-2 text-sm font-bold text-ink transition-colors hover:border-primary hover:text-primary"
+					>
+						<span
+							class="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-primary text-xs text-primary-fg"
+							aria-hidden="true"
+						>
+							{person.name.charAt(0).toUpperCase()}
+						</span>
+						{person.name}
+					</button>
+				{/each}
+			</div>
+		</div>
+	{/if}
+</div>

frontend/src/routes/korrespondenz/CorrespondenzFilterControls.svelte

@@ -0,0 +1,115 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+import DateInput from '$lib/components/DateInput.svelte';
+
+interface Props {
+	senderId: string;
+	fromDate?: string;
+	toDate?: string;
+	sortDir?: string;
+	documentCount?: number;
+	onapplyFilters: () => void;
+	ontoggleSort: () => void;
+}
+
+let {
+	senderId,
+	fromDate = $bindable(''),
+	toDate = $bindable(''),
+	sortDir = $bindable('DESC'),
+	documentCount,
+	onapplyFilters,
+	ontoggleSort
+}: Props = $props();
+
+let hasDateFilter = $derived(!!(fromDate || toDate));
+let isActive = $derived(!!(fromDate || toDate || sortDir !== 'DESC'));
+</script>
+
+<div
+	class="flex items-center gap-[10px] border-b border-line bg-muted px-4 py-[5px] transition-opacity sm:px-[18px]"
+	class:opacity-40={!senderId}
+	class:pointer-events-none={!senderId}
+	aria-disabled={!senderId}
+>
+	<!-- Period label -->
+	<span class="hidden text-xs font-bold tracking-wide text-ink-3 uppercase sm:block">
+		{m.conv_strip_period()}
+	</span>
+
+	<!-- From date -->
+	<DateInput
+		bind:value={fromDate}
+		onchange={() => onapplyFilters()}
+		placeholder={m.conv_strip_from_placeholder()}
+		class="h-8 w-[100px] rounded border bg-surface px-2 text-xs text-ink focus:outline-none {fromDate ? 'border-primary' : 'border-line'}"
+	/>
+
+	<span class="text-xs text-ink-3">–</span>
+
+	<!-- To date -->
+	<DateInput
+		bind:value={toDate}
+		onchange={() => onapplyFilters()}
+		placeholder={m.conv_strip_to_placeholder()}
+		class="h-8 w-[100px] rounded border bg-surface px-2 text-xs text-ink focus:outline-none {toDate ? 'border-primary' : 'border-line'}"
+	/>
+
+	<!-- Document count -->
+	<span
+		data-testid="conv-strip-count"
+		class="ml-auto text-xs font-bold"
+		class:text-primary={hasDateFilter}
+		class:text-ink-3={!hasDateFilter}
+	>
+		{m.conv_letters_count({ count: documentCount ?? 0 })}
+	</span>
+
+	<!-- Sort button -->
+	<button
+		data-testid="conv-sort-btn"
+		type="button"
+		aria-label="Sortierung umkehren"
+		aria-pressed={sortDir === 'ASC'}
+		onclick={ontoggleSort}
+		class="flex h-8 min-h-[44px] items-center gap-1 rounded border px-3 text-xs font-bold"
+		class:border-primary={isActive}
+		class:text-primary={isActive}
+		class:border-line={!isActive}
+		class:text-ink-3={!isActive}
+	>
+		{#if sortDir === 'ASC'}
+			{m.conv_strip_sort_oldest()}
+			<svg
+				xmlns="http://www.w3.org/2000/svg"
+				width="10"
+				height="10"
+				viewBox="0 0 24 24"
+				fill="none"
+				stroke="currentColor"
+				stroke-width="2.5"
+				stroke-linecap="round"
+				stroke-linejoin="round"
+				aria-hidden="true"
+			>
+				<polyline points="18 15 12 9 6 15" />
+			</svg>
+		{:else}
+			{m.conv_strip_sort_newest()}
+			<svg
+				xmlns="http://www.w3.org/2000/svg"
+				width="10"
+				height="10"
+				viewBox="0 0 24 24"
+				fill="none"
+				stroke="currentColor"
+				stroke-width="2.5"
+				stroke-linecap="round"
+				stroke-linejoin="round"
+				aria-hidden="true"
+			>
+				<polyline points="6 9 12 15 18 9" />
+			</svg>
+		{/if}
+	</button>
+</div>

frontend/src/routes/korrespondenz/CorrespondenzPersonBar.svelte

@@ -0,0 +1,129 @@
+<script lang="ts">
+import PersonTypeahead from '$lib/components/PersonTypeahead.svelte';
+import CorrespondentSuggestionsDropdown from './CorrespondentSuggestionsDropdown.svelte';
+
+interface Props {
+	senderId?: string;
+	receiverId?: string;
+	initialSenderName?: string;
+	initialReceiverName?: string;
+	onapplyFilters: () => void;
+	onswapPersons: () => void;
+}
+
+let {
+	senderId = $bindable(''),
+	receiverId = $bindable(''),
+	initialSenderName = '',
+	initialReceiverName = '',
+	onapplyFilters,
+	onswapPersons
+}: Props = $props();
+
+interface Correspondent {
+	id: string;
+	firstName: string;
+	lastName: string;
+}
+
+let swapVisible = $derived(!!(senderId && receiverId));
+
+let showSuggestions = $state(false);
+let correspondents = $state<Correspondent[]>([]);
+let loadingCorrespondents = $state(false);
+
+async function handleCorrespondentFocused() {
+	if (!senderId) return;
+	showSuggestions = true;
+	loadingCorrespondents = true;
+	try {
+		const res = await fetch(`/api/persons/${senderId}/correspondents`);
+		correspondents = res.ok ? await res.json() : [];
+	} catch {
+		correspondents = [];
+	} finally {
+		loadingCorrespondents = false;
+	}
+}
+
+function handleSuggestionSelect(id: string) {
+	receiverId = id;
+	showSuggestions = false;
+	onapplyFilters();
+}
+</script>
+
+<div class="flex items-end gap-[9px] border-b border-line bg-surface px-4 py-[9px] sm:px-[18px]">
+	<!-- Person A -->
+	<div class="min-w-0 flex-1">
+		<PersonTypeahead
+			name="senderId"
+			label="Person"
+			bind:value={senderId}
+			initialName={initialSenderName}
+			compact={true}
+			restrictToCorrespondentsOf={receiverId || undefined}
+			onchange={() => onapplyFilters()}
+		/>
+	</div>
+
+	<!-- Swap button -->
+	<button
+		data-testid="conv-swap-btn"
+		type="button"
+		aria-label="Personen tauschen"
+		onclick={onswapPersons}
+		class="flex h-9 w-9 shrink-0 items-center justify-center rounded border border-line bg-surface text-ink-3 transition-colors hover:border-primary hover:text-primary"
+		class:opacity-0={!swapVisible}
+		class:pointer-events-none={!swapVisible}
+		tabindex={swapVisible ? 0 : -1}
+	>
+		<svg
+			xmlns="http://www.w3.org/2000/svg"
+			width="14"
+			height="14"
+			viewBox="0 0 24 24"
+			fill="none"
+			stroke="currentColor"
+			stroke-width="2"
+			stroke-linecap="round"
+			stroke-linejoin="round"
+			aria-hidden="true"
+		>
+			<path d="M7 16V4m0 0L3 8m4-4l4 4" />
+			<path d="M17 8v12m0 0l4-4m-4 4l-4-4" />
+		</svg>
+	</button>
+
+	<!-- Korrespondent field -->
+	<div
+		class="relative min-w-0 flex-1"
+		class:[&_input]:border-dashed={!receiverId}
+		class:[&_input]:border-solid={!!receiverId}
+		class:[&_input]:bg-canvas={!receiverId}
+	>
+		<PersonTypeahead
+			name="receiverId"
+			label={receiverId ? 'Korrespondent' : 'Korrespondent — optional'}
+			bind:value={receiverId}
+			initialName={initialReceiverName}
+			compact={true}
+			placeholder="Alle Korrespondenten"
+			restrictToCorrespondentsOf={senderId || undefined}
+			onchange={() => {
+				showSuggestions = false;
+				onapplyFilters();
+			}}
+			onfocused={handleCorrespondentFocused}
+		/>
+		{#if showSuggestions && senderId && !receiverId}
+			<CorrespondentSuggestionsDropdown
+				correspondents={correspondents}
+				loading={loadingCorrespondents}
+				senderName=""
+				onselect={handleSuggestionSelect}
+				onclose={() => (showSuggestions = false)}
+			/>
+		{/if}
+	</div>
+</div>

frontend/src/routes/korrespondenz/SinglePersonHintBar.svelte

@@ -0,0 +1,50 @@
+<script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+
+interface Props {
+	senderName: string;
+	fromDate?: string;
+	toDate?: string;
+	sortDir?: string;
+}
+
+let { senderName, fromDate = '', toDate = '', sortDir = 'DESC' }: Props = $props();
+
+let hasDateFilter = $derived(!!(fromDate || toDate));
+let sortLabel = $derived(
+	sortDir === 'ASC' ? m.conv_strip_sort_oldest() : m.conv_strip_sort_newest()
+);
+let fromYear = $derived(fromDate ? fromDate.substring(0, 4) : '');
+let toYear = $derived(toDate ? toDate.substring(0, 4) : '');
+</script>
+
+<div
+	class="flex items-center gap-[5px] border-b border-accent bg-accent-bg px-[18px] py-[6px] text-xs text-ink"
+>
+	<svg
+		xmlns="http://www.w3.org/2000/svg"
+		width="14"
+		height="14"
+		viewBox="0 0 24 24"
+		fill="none"
+		stroke="currentColor"
+		stroke-width="1.5"
+		stroke-linecap="round"
+		stroke-linejoin="round"
+		aria-hidden="true"
+		class="shrink-0"
+	>
+		<path d="M9 5H7a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-2" />
+		<rect x="9" y="3" width="6" height="4" rx="1" />
+	</svg>
+
+	{#if hasDateFilter}
+		<strong>{senderName}</strong>
+		<span>·</span>
+		<span>{fromYear}–{toYear}</span>
+		<span>·</span>
+		<span>{sortLabel}</span>
+	{:else}
+		Alle Briefe von <strong>{senderName}</strong> — wähle einen Korrespondenten oben um einzugrenzen
+	{/if}
+</div>

frontend/src/routes/korrespondenz/page.server.spec.ts

@@ -0,0 +1,146 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { load } from './+page.server';
+
+vi.mock('$lib/api.server', () => ({ createApiClient: vi.fn() }));
+vi.mock('$lib/errors', () => ({ getErrorMessage: (code: string) => code ?? 'Unknown error' }));
+
+import { createApiClient } from '$lib/api.server';
+
+const writeUser = { groups: [{ permissions: ['WRITE_ALL'] }] };
+const readUser = { groups: [{ permissions: ['READ_ALL'] }] };
+
+function makeUrl(params: Record<string, string> = {}): URL {
+	const url = new URL('http://x/korrespondenz');
+	for (const [k, v] of Object.entries(params)) url.searchParams.set(k, v);
+	return url;
+}
+
+function mockApi(calls: { ok: boolean; data?: unknown; status?: number }[]) {
+	const GET = vi.fn();
+	for (const call of calls) {
+		GET.mockResolvedValueOnce({
+			response: { ok: call.ok, status: call.status ?? (call.ok ? 200 : 500) },
+			data: call.data,
+			error: call.ok ? undefined : { code: 'INTERNAL_ERROR' }
+		});
+	}
+	vi.mocked(createApiClient).mockReturnValue({ GET } as ReturnType<typeof createApiClient>);
+	return GET;
+}
+
+beforeEach(() => vi.clearAllMocks());
+
+// ─── No senderId ──────────────────────────────────────────────────────────────
+
+describe('korrespondenz load — no senderId', () => {
+	it('returns empty documents without calling the conversation endpoint', async () => {
+		const GET = mockApi([]);
+
+		const result = await load({
+			url: makeUrl(),
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: readUser }
+		});
+
+		expect(result.documents).toEqual([]);
+		expect(GET).not.toHaveBeenCalled();
+	});
+});
+
+// ─── With senderId, no receiverId ────────────────────────────────────────────
+
+describe('korrespondenz load — senderId set, no receiverId', () => {
+	it('calls the conversation endpoint and the sender person endpoint', async () => {
+		const docs = [{ id: 'd1', title: 'Testbrief' }];
+		const GET = mockApi([
+			{ ok: true, data: docs },
+			{ ok: true, data: { firstName: 'Hans', lastName: 'Müller' } }
+		]);
+
+		const result = await load({
+			url: makeUrl({ senderId: 'p1' }),
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: readUser }
+		});
+
+		expect(result.documents).toEqual(docs);
+		expect(result.initialValues.senderName).toBe('Hans Müller');
+		expect(result.initialValues.receiverName).toBe('');
+		expect(GET).toHaveBeenCalledTimes(2);
+	});
+});
+
+// ─── With senderId and receiverId ────────────────────────────────────────────
+
+describe('korrespondenz load — senderId and receiverId set', () => {
+	it('calls conversation, sender person, and receiver person endpoints', async () => {
+		const GET = mockApi([
+			{ ok: true, data: [] },
+			{ ok: true, data: { firstName: 'Hans', lastName: 'Müller' } },
+			{ ok: true, data: { firstName: 'Anna', lastName: 'Schmidt' } }
+		]);
+
+		const result = await load({
+			url: makeUrl({ senderId: 'p1', receiverId: 'p2' }),
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: readUser }
+		});
+
+		expect(result.initialValues.senderName).toBe('Hans Müller');
+		expect(result.initialValues.receiverName).toBe('Anna Schmidt');
+		expect(GET).toHaveBeenCalledTimes(3);
+	});
+});
+
+// ─── canWrite derivation ─────────────────────────────────────────────────────
+
+describe('korrespondenz load — canWrite', () => {
+	it('derives canWrite true from WRITE_ALL permission', async () => {
+		mockApi([
+			{ ok: true, data: [] },
+			{ ok: true, data: { firstName: 'Hans', lastName: 'Müller' } }
+		]);
+
+		const result = await load({
+			url: makeUrl({ senderId: 'p1' }),
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: writeUser }
+		});
+
+		expect(result.canWrite).toBe(true);
+	});
+
+	it('derives canWrite false when user lacks WRITE_ALL', async () => {
+		mockApi([
+			{ ok: true, data: [] },
+			{ ok: true, data: { firstName: 'Hans', lastName: 'Müller' } }
+		]);
+
+		const result = await load({
+			url: makeUrl({ senderId: 'p1' }),
+			fetch: vi.fn() as unknown as typeof fetch,
+			locals: { user: readUser }
+		});
+
+		expect(result.canWrite).toBe(false);
+	});
+});
+
+// ─── Backend error propagation ────────────────────────────────────────────────
+
+describe('korrespondenz load — backend error', () => {
+	it('throws when the conversation endpoint returns non-ok', async () => {
+		mockApi([
+			{ ok: false, status: 500 },
+			{ ok: true, data: { firstName: 'Hans', lastName: 'Müller' } }
+		]);
+
+		await expect(
+			load({
+				url: makeUrl({ senderId: 'p1' }),
+				fetch: vi.fn() as unknown as typeof fetch,
+				locals: { user: readUser }
+			})
+		).rejects.toMatchObject({ status: 500 });
+	});
+});

frontend/src/routes/korrespondenz/page.svelte.spec.ts

@@ -0,0 +1,246 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import Page from './+page.svelte';
+
+vi.mock('$app/navigation', () => ({ goto: vi.fn() }));
+
+afterEach(cleanup);
+
+// ─── Test data ────────────────────────────────────────────────────────────────
+
+const baseData = {
+	user: undefined,
+	canWrite: true,
+	canAnnotate: false,
+	documents: [],
+	initialValues: { senderName: '', receiverName: '' },
+	filters: { senderId: '', receiverId: '', from: '', to: '', dir: 'DESC' as const }
+};
+
+const withSender = {
+	...baseData,
+	initialValues: { senderName: 'Hans Müller', receiverName: '' },
+	filters: { ...baseData.filters, senderId: 'p1' }
+};
+
+const withPersons = {
+	...baseData,
+	initialValues: { senderName: 'Hans Müller', receiverName: 'Anna Schmidt' },
+	filters: { ...baseData.filters, senderId: 'p1', receiverId: 'p2' }
+};
+
+const makeDoc = (overrides: Record<string, unknown> = {}) => ({
+	id: 'd1',
+	title: 'Testbrief',
+	originalFilename: 'testbrief.pdf',
+	status: 'UPLOADED' as const,
+	documentDate: '1923-04-12',
+	location: 'Berlin',
+	metadataComplete: false,
+	sender: { id: 'p1', firstName: 'Hans', lastName: 'Müller' },
+	receivers: [{ id: 'p2', firstName: 'Anna', lastName: 'Schmidt' }],
+	tags: [],
+	transcription: undefined,
+	filePath: undefined,
+	createdAt: '1923-04-12T00:00:00Z',
+	updatedAt: '1923-04-12T00:00:00Z',
+	...overrides
+});
+
+const withDocs = {
+	...withPersons,
+	documents: [makeDoc()]
+};
+
+// ─── Empty state (no senderId) ────────────────────────────────────────────────
+
+describe('Korrespondenz page – empty state', () => {
+	it('shows the search heading when no person is selected', async () => {
+		render(Page, { data: baseData });
+		await expect.element(page.getByText(/Korrespondenz durchsuchen/i)).toBeInTheDocument();
+	});
+
+	it('shows the empty-search button', async () => {
+		render(Page, { data: baseData });
+		await expect.element(page.getByTestId('conv-empty-search')).toBeInTheDocument();
+	});
+
+	it('does not show the new document link when no person is selected', async () => {
+		render(Page, { data: baseData });
+		await expect.element(page.getByTestId('conv-new-doc-link')).not.toBeInTheDocument();
+	});
+
+	it('does not show a year divider when no person is selected', async () => {
+		render(Page, { data: baseData });
+		await expect.element(page.getByTestId('year-divider')).not.toBeInTheDocument();
+	});
+});
+
+// ─── Recent persons chips ─────────────────────────────────────────────────────
+
+describe('Korrespondenz page – recent persons', () => {
+	it('shows recent person chips from localStorage', async () => {
+		localStorage.setItem(
+			'korrespondenz_recent_persons',
+			JSON.stringify([{ id: 'r1', name: 'Clara Braun' }])
+		);
+		render(Page, { data: baseData });
+		await expect.element(page.getByText('Clara Braun')).toBeInTheDocument();
+		localStorage.removeItem('korrespondenz_recent_persons');
+	});
+
+	it('does not crash when localStorage contains corrupt JSON', async () => {
+		localStorage.setItem('korrespondenz_recent_persons', '}{not valid json');
+		render(Page, { data: baseData });
+		// Empty state heading is still shown — no chip list crash
+		await expect.element(page.getByText(/Korrespondenz durchsuchen/i)).toBeInTheDocument();
+		localStorage.removeItem('korrespondenz_recent_persons');
+	});
+});
+
+// ─── Single-person hint bar ───────────────────────────────────────────────────
+
+describe('Korrespondenz page – single-person hint bar', () => {
+	it('shows hint bar when only senderId is set', async () => {
+		render(Page, { data: withSender });
+		await expect.element(page.getByText(/Alle Briefe von Hans Müller/i)).toBeInTheDocument();
+	});
+
+	it('does not show hint bar when both persons are set', async () => {
+		render(Page, { data: { ...withPersons, documents: [makeDoc()] } });
+		await expect.element(page.getByText(/Alle Briefe von Hans Müller/i)).not.toBeInTheDocument();
+	});
+
+	it('does not show hint bar when no person is set', async () => {
+		render(Page, { data: baseData });
+		await expect.element(page.getByText(/Alle Briefe von/i)).not.toBeInTheDocument();
+	});
+});
+
+// ─── Filter controls disabled state ──────────────────────────────────────────
+
+describe('Korrespondenz page – filter strip Row 2 disabled state', () => {
+	it('renders filter controls with aria-disabled when no senderId', async () => {
+		render(Page, { data: baseData });
+		const strip = document.querySelector('[aria-disabled="true"]');
+		expect(strip).not.toBeNull();
+	});
+
+	it('filter controls are not aria-disabled when senderId is set', async () => {
+		render(Page, { data: withSender });
+		const strip = document.querySelector('[aria-disabled="false"]');
+		expect(strip).not.toBeNull();
+	});
+});
+
+// ─── Strip letter count ───────────────────────────────────────────────────────
+
+describe('Korrespondenz page – strip letter count', () => {
+	it('shows 0 Briefe when senderId is set but no documents', async () => {
+		render(Page, { data: withSender });
+		await expect.element(page.getByTestId('conv-strip-count')).toHaveTextContent('0 Briefe');
+	});
+
+	it('shows correct count when documents are loaded', async () => {
+		render(Page, { data: { ...withPersons, documents: [makeDoc()] } });
+		await expect.element(page.getByTestId('conv-strip-count')).toHaveTextContent('1 Briefe');
+	});
+});
+
+// ─── No results ───────────────────────────────────────────────────────────────
+
+describe('Korrespondenz page – no results', () => {
+	it('shows "no documents found" when a person is selected but there are no documents', async () => {
+		render(Page, { data: withSender });
+		await expect.element(page.getByText(/Keine Dokumente gefunden/i)).toBeInTheDocument();
+	});
+});
+
+// ─── Swap button ──────────────────────────────────────────────────────────────
+
+describe('Korrespondenz page – swap button', () => {
+	it('swap button is invisible when only one person is set', async () => {
+		render(Page, { data: withSender });
+		const btn = document.querySelector<HTMLElement>('[data-testid="conv-swap-btn"]');
+		expect(btn).not.toBeNull();
+		// opacity-0 is applied via class when swapVisible is false
+		expect(btn!.className).toMatch(/opacity-0/);
+	});
+
+	it('swap button is visible when both persons are set', async () => {
+		render(Page, { data: withPersons });
+		const btn = document.querySelector<HTMLElement>('[data-testid="conv-swap-btn"]');
+		expect(btn).not.toBeNull();
+		expect(btn!.className).not.toMatch(/opacity-0/);
+	});
+
+	it('calls goto with swapped sender and receiver when clicked', async () => {
+		const { goto } = await import('$app/navigation');
+		vi.mocked(goto).mockClear();
+		render(Page, { data: withPersons });
+		document.querySelector<HTMLElement>('[data-testid="conv-swap-btn"]')!.click();
+		expect(goto).toHaveBeenCalledWith(expect.stringContaining('senderId=p2'), expect.anything());
+		expect(goto).toHaveBeenCalledWith(expect.stringContaining('receiverId=p1'), expect.anything());
+	});
+});
+
+// ─── Year dividers ────────────────────────────────────────────────────────────
+
+describe('Korrespondenz page – year dividers', () => {
+	it('renders a year divider for the first document', async () => {
+		render(Page, { data: withDocs });
+		await expect.element(page.getByTestId('year-divider').first()).toHaveTextContent('1923');
+	});
+
+	it('renders a divider for each new year in the document list', async () => {
+		const data = {
+			...withPersons,
+			documents: [
+				makeDoc({ documentDate: '1923-04-12' }),
+				makeDoc({ id: 'd2', documentDate: '1965-08-03' })
+			]
+		};
+		render(Page, { data });
+		await expect.element(page.getByTestId('year-divider').first()).toHaveTextContent('1923');
+		await expect.element(page.getByTestId('year-divider').nth(1)).toHaveTextContent('1965');
+	});
+
+	it('does not render a second divider for documents from the same year', async () => {
+		const data = {
+			...withPersons,
+			documents: [
+				makeDoc({ documentDate: '1923-04-12' }),
+				makeDoc({ id: 'd2', documentDate: '1923-09-01' })
+			]
+		};
+		render(Page, { data });
+		await expect.element(page.getByTestId('year-divider').first()).toHaveTextContent('1923');
+		await expect.element(page.getByTestId('year-divider').nth(1)).not.toBeInTheDocument();
+	});
+});
+
+// ─── New document link ────────────────────────────────────────────────────────
+
+describe('Korrespondenz page – new document link', () => {
+	it('shows the link with correct href for a write user (bilateral)', async () => {
+		render(Page, { data: { ...withDocs, canWrite: true } });
+		const link = page.getByTestId('conv-new-doc-link');
+		await expect.element(link).toBeInTheDocument();
+		await expect.element(link).toHaveAttribute('href', expect.stringContaining('senderId=p1'));
+		await expect.element(link).toHaveAttribute('href', expect.stringContaining('receiverId=p2'));
+	});
+
+	it('shows the link with correct href for single-person mode', async () => {
+		render(Page, { data: { ...withSender, documents: [makeDoc()], canWrite: true } });
+		const link = page.getByTestId('conv-new-doc-link');
+		await expect.element(link).toBeInTheDocument();
+		await expect.element(link).toHaveAttribute('href', expect.stringContaining('senderId=p1'));
+		await expect.element(link).not.toHaveAttribute('href', expect.stringContaining('receiverId'));
+	});
+
+	it('hides the link for a read-only user', async () => {
+		render(Page, { data: { ...withDocs, canWrite: false } });
+		await expect.element(page.getByTestId('conv-new-doc-link')).not.toBeInTheDocument();
+	});
+});

frontend/src/routes/persons/[id]/CoCorrespondentsList.svelte

@@ -30,7 +30,7 @@ function initials(name: string): string {
 		<div class="flex flex-wrap gap-2">
 			{#each coCorrespondents as c (c.id)}
 				<a
-					href="/conversations?senderId={personId}&receiverId={c.id}"
+					href="/korrespondenz?senderId={personId}&receiverId={c.id}"
 					title={m.doc_conversation_title()}
 					class="inline-flex items-center gap-1.5 rounded-full border border-line bg-muted px-3 py-1.5 font-sans text-xs font-bold text-ink transition-colors hover:border-primary hover:bg-surface"
 				>