feat(stats): add totalStories to StatsDTO via GeschichteService.countPublished()

Addresses @Elicit review concern: stories stat tile was permanently showing
"—" because StatsDTO had no published-story count. Now wired end-to-end.

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

backend/src/main/java/org/raddatz/familienarchiv/dashboard/StatsDTO.java

@@ -1,7 +1,12 @@
 package org.raddatz.familienarchiv.dashboard;
 
+import io.swagger.v3.oas.annotations.media.Schema;
+
 /**
  * Aggregate counts for the dashboard/persons stats bar.
  */
-public record StatsDTO(long totalPersons, long totalDocuments) {
+public record StatsDTO(
+        @Schema(requiredMode = Schema.RequiredMode.REQUIRED) long totalPersons,
+        @Schema(requiredMode = Schema.RequiredMode.REQUIRED) long totalDocuments,
+        @Schema(requiredMode = Schema.RequiredMode.REQUIRED) long totalStories) {
 }

backend/src/main/java/org/raddatz/familienarchiv/dashboard/StatsService.java

@@ -2,6 +2,7 @@ package org.raddatz.familienarchiv.dashboard;
 
 import lombok.RequiredArgsConstructor;
 import org.raddatz.familienarchiv.document.DocumentService;
+import org.raddatz.familienarchiv.geschichte.GeschichteService;
 import org.raddatz.familienarchiv.person.PersonService;
 import org.raddatz.familienarchiv.dashboard.StatsDTO;
 import org.springframework.stereotype.Service;
@@ -12,8 +13,9 @@ public class StatsService {
 
     private final PersonService personService;
     private final DocumentService documentService;
+    private final GeschichteService geschichteService;
 
     public StatsDTO getStats() {
-        return new StatsDTO(personService.count(), documentService.count());
+        return new StatsDTO(personService.count(), documentService.count(), geschichteService.countPublished());
     }
 }

backend/src/main/java/org/raddatz/familienarchiv/geschichte/GeschichteService.java

@@ -56,6 +56,10 @@ public class GeschichteService {
 
     // ─── Read API ────────────────────────────────────────────────────────────
 
+    public long countPublished() {
+        return geschichteRepository.count(GeschichteSpecifications.hasStatus(GeschichteStatus.PUBLISHED));
+    }
+
     public Geschichte getById(UUID id) {
         Geschichte g = geschichteRepository.findById(id)
                 .orElseThrow(() -> DomainException.notFound(

backend/src/test/java/org/raddatz/familienarchiv/dashboard/StatsControllerTest.java

@@ -44,7 +44,7 @@ class StatsControllerTest {
     @Test
     @WithMockUser(authorities = "READ_ALL")
     void getStats_returns200_withCorrectCounts() throws Exception {
-        when(statsService.getStats()).thenReturn(new StatsDTO(4L, 12L));
+        when(statsService.getStats()).thenReturn(new StatsDTO(4L, 12L, 2L));
 
         mockMvc.perform(get("/api/stats"))
                 .andExpect(status().isOk())
@@ -55,7 +55,7 @@ class StatsControllerTest {
     @Test
     @WithMockUser(authorities = "READ_ALL")
     void getStats_returns200_withZeroCounts() throws Exception {
-        when(statsService.getStats()).thenReturn(new StatsDTO(0L, 0L));
+        when(statsService.getStats()).thenReturn(new StatsDTO(0L, 0L, 0L));
 
         mockMvc.perform(get("/api/stats"))
                 .andExpect(status().isOk())

backend/src/test/java/org/raddatz/familienarchiv/dashboard/StatsServiceTest.java

@@ -7,6 +7,7 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.raddatz.familienarchiv.document.DocumentService;
 import org.raddatz.familienarchiv.dashboard.StatsDTO;
+import org.raddatz.familienarchiv.geschichte.GeschichteService;
 import org.raddatz.familienarchiv.person.PersonService;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -17,6 +18,7 @@ class StatsServiceTest {
 
     @Mock PersonService personService;
     @Mock DocumentService documentService;
+    @Mock GeschichteService geschichteService;
     @InjectMocks StatsService statsService;
 
     @Test
@@ -30,6 +32,17 @@ class StatsServiceTest {
         assertThat(stats.totalDocuments()).isEqualTo(12L);
     }
 
+    @Test
+    void getStats_includes_totalStories() {
+        when(personService.count()).thenReturn(3L);
+        when(documentService.count()).thenReturn(7L);
+        when(geschichteService.countPublished()).thenReturn(5L);
+
+        StatsDTO stats = statsService.getStats();
+
+        assertThat(stats.totalStories()).isEqualTo(5L);
+    }
+
     @Test
     void getStats_returnsZero_whenNoEntities() {
         when(personService.count()).thenReturn(0L);