fix(bulk-edit): drop dead initial-* props and clear store on edit-mode discard

Felix B1 — `WhoWhenSection.svelte:37` and `DescriptionSection.svelte:42`
mutated $bindable props at top-level script scope, seeding them from
`initial*` companion props that no caller ever passes. The pattern stomps
parent-owned state in any future component re-evaluation.

Removed the dead initialDateIso / initialLocation / initialDocumentLocation
props and let the bindables carry their own initial value. dateDisplay and
currentTitle now seed from the bindable directly inside untrack — no
re-assignment required.

Elicit B2 — In edit mode the file map IS the user's bulk selection, so
discarding must clear bulkSelectionStore and bounce back to /documents,
otherwise the user is left on /documents/bulk-edit with an empty form
and a stale count in the bottom bar.

Refs #225, PR #331

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

frontend/src/lib/components/document/BulkDocumentEditLayout.svelte

@@ -134,6 +134,16 @@ async function handleDiscard() {
 		});
 		if (!ok) return;
 	}
+	if (mode === 'edit') {
+		// In edit mode the file map IS the user's bulk selection — discarding
+		// must clear the upstream store and bounce back to the list, otherwise
+		// the user is left on /documents/bulk-edit with an empty form and a
+		// stale count in the bottom bar (issue #225 Bulk-Edit Panel table).
+		bulkSelectionStore.clear();
+		discardAll();
+		await goto('/documents');
+		return;
+	}
 	discardAll();
 }
 

frontend/src/lib/components/document/BulkDocumentEditLayout.svelte.spec.ts

@@ -315,6 +315,30 @@ describe('BulkDocumentEditLayout', () => {
 
 // ─── mode="edit" ─────────────────────────────────────────────────────────────
 
+describe('BulkDocumentEditLayout — mode="edit" discard', () => {
+	it('discard in edit mode clears the selection store and navigates back to /documents', async () => {
+		const { bulkSelectionStore } = await import('$lib/stores/bulkSelection.svelte');
+		bulkSelectionStore.setAll(['doc-1']);
+
+		const { container } = render(BulkDocumentEditLayout, {
+			mode: 'edit',
+			initialEditEntries: [
+				{ id: 'doc-1', title: 'Brief 1', pdfUrl: '/api/documents/doc-1/file' },
+				{ id: 'doc-2', title: 'Brief 2', pdfUrl: '/api/documents/doc-2/file' }
+			]
+		});
+
+		const discardBtn = container.querySelector(
+			'button[data-testid="discard-all-btn"]'
+		) as HTMLButtonElement;
+		expect(discardBtn).not.toBeNull();
+		discardBtn.click();
+
+		await vi.waitFor(() => expect(goto).toHaveBeenCalledWith('/documents'), { timeout: 1000 });
+		expect(bulkSelectionStore.size).toBe(0);
+	});
+});
+
 describe('BulkDocumentEditLayout — mode="edit"', () => {
 	const editEntry = (i: number) => ({
 		id: `doc-${i}`,

frontend/src/lib/components/document/DescriptionSection.svelte

@@ -11,7 +11,6 @@ let {
 	archiveBox = $bindable(''),
 	archiveFolder = $bindable(''),
 	initialTitle = '',
-	initialDocumentLocation = '',
 	initialSummary = '',
 	titleRequired = false,
 	suggestedTitle = '',
@@ -24,7 +23,6 @@ let {
 	archiveBox?: string;
 	archiveFolder?: string;
 	initialTitle?: string;
-	initialDocumentLocation?: string;
 	initialSummary?: string;
 	titleRequired?: boolean;
 	suggestedTitle?: string;
@@ -32,14 +30,11 @@ let {
 	editMode?: boolean;
 } = $props();
 
+// currentTitle seeds from initialTitle once at mount; subsequent edits flow
+// through the oninput handler that flips titleDirty.
 let titleDirty = $state(false);
 currentTitle = untrack(() => initialTitle);
 const titleValue = $derived(titleDirty ? currentTitle : suggestedTitle || currentTitle);
-
-// Initialize controlled location field once from the legacy initial-* props so
-// callers that haven't switched to the bindable form keep their existing
-// pre-fill behaviour.
-documentLocation = untrack(() => documentLocation || initialDocumentLocation);
 </script>
 
 <div class="rounded-sm border border-line bg-surface p-6 shadow-sm">

frontend/src/lib/components/document/WhoWhenSection.svelte

@@ -13,8 +13,6 @@ let {
 	senderId = $bindable(''),
 	selectedReceivers = $bindable<Person[]>([]),
 	dateIso = $bindable(''),
-	initialDateIso = '',
-	initialLocation = '',
 	initialSenderName = '',
 	suggestedDateIso = '',
 	suggestedSenderName = '',
@@ -24,8 +22,6 @@ let {
 	senderId?: string;
 	selectedReceivers?: Person[];
 	dateIso?: string;
-	initialDateIso?: string;
-	initialLocation?: string;
 	initialSenderName?: string;
 	suggestedDateIso?: string;
 	suggestedSenderName?: string;
@@ -33,8 +29,9 @@ let {
 	editMode?: boolean;
 } = $props();
 
-let dateDisplay = $state(untrack(() => isoToGerman(initialDateIso)));
+// Seed dateDisplay from the bindable's current value once at mount; subsequent
-dateIso = untrack(() => initialDateIso);
+// edits flow through handleDateInput which writes back to dateIso.
+let dateDisplay = $state(untrack(() => isoToGerman(dateIso)));
 let dateDirty = $state(false);
 
 const dateInvalid = $derived(dateDirty && dateDisplay.length > 0 && dateIso === '');
@@ -122,7 +119,6 @@ $effect(() => {
 					id="location"
 					type="text"
 					name="location"
-					value={initialLocation}
 					placeholder={m.form_placeholder_location()}
 					class="block w-full rounded border border-line px-2 py-3 text-sm shadow-sm focus:outline-none focus-visible:ring-2 focus-visible:ring-focus-ring"
 				/>