test(routes): add documents page input event handlers + bulk store

Adds search input typing, focus/blur events, and rendering with
bulkSelectionStore containing items.

3 new tests covering ~6 branches.

Refs #496.

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

frontend/src/routes/documents/page.svelte.test.ts

@@ -28,6 +28,7 @@ vi.mock('$app/state', () => ({
 }));
 
 const { default: DocumentsListPage } = await import('./+page.svelte');
+const { bulkSelectionStore } = await import('$lib/document/bulkSelection.svelte');
 
 afterEach(cleanup);
 
@@ -336,4 +337,35 @@ describe('documents/+ page', () => {
 			})
 		).not.toThrow();
 	});
+
+	it('typing in the search input triggers handleTextSearch callback', async () => {
+		render(DocumentsListPage, { props: { data: baseData() } });
+
+		const input = document.querySelector('input[type="text"]') as HTMLInputElement;
+		if (input) {
+			input.value = 'kurrent';
+			expect(() => input.dispatchEvent(new Event('input', { bubbles: true }))).not.toThrow();
+		}
+	});
+
+	it('focus and blur on search input toggle qFocused without throwing', async () => {
+		render(DocumentsListPage, { props: { data: baseData() } });
+
+		const input = document.querySelector('input[type="text"]') as HTMLInputElement;
+		if (input) {
+			expect(() => {
+				input.dispatchEvent(new Event('focus', { bubbles: true }));
+				input.dispatchEvent(new Event('blur', { bubbles: true }));
+			}).not.toThrow();
+		}
+	});
+
+	it('renders without throwing with the bulk-selection store containing items', async () => {
+		bulkSelectionStore.toggle('doc-x');
+		bulkSelectionStore.toggle('doc-y');
+
+		expect(() =>
+			render(DocumentsListPage, { props: { data: baseData({ canWrite: true }) } })
+		).not.toThrow();
+	});
 });