docs/adr/012-browser-test-mocking-strategy.md

@@ -79,7 +79,7 @@ The following `vi.mock(module, factory)` calls in browser specs are **acceptable
 
 These modules are resolved at static import time (before any test runs). Their `vi.mock` factories are served by birpc synchronously during module graph resolution, not after worker teardown.
 
-**Pattern note:** When an overlay or dropdown contains a navigation link (`<a href="…">`), use `e.preventDefault()` + `goto(path)` in the click handler instead of letting the browser follow the `href`. In a vitest-browser Playwright iframe there is no SvelteKit router, so a real navigation tears down the orchestrator iframe and crashes the test run. The `href` attribute should still be present for right-click / open-in-new-tab semantics.
+**Pattern note:** When an overlay or dropdown triggers a navigation action, use `<button type="button">` with an `onclick` handler that calls `goto(path)` — do **not** use `<a href="…">` with `e.preventDefault()`. SvelteKit registers its link interceptor as a capture-phase `document` listener, so it fires before the component's bubble-phase `onclick`. By the time `e.preventDefault()` runs the router has already initiated navigation, which tears down the vitest-browser Playwright orchestrator iframe. A `<button>` carries no `href`, so the capture-phase interceptor never fires. See `NotificationDropdown.svelte` for the canonical example.
 
 ---
 

frontend/src/lib/notification/NotificationDropdown.svelte

@@ -13,9 +13,8 @@ type Props = {
 
 let { notifications, onMarkRead, onMarkAllRead, onClose }: Props = $props();
 
-function handleViewAll(e: MouseEvent) {
-	e.preventDefault();
-	onClose();
+function handleViewAll() {
+	onClose(); // close first — avoids stale dropdown during navigation transition
 	goto('/aktivitaeten');
 }
 </script>
@@ -134,12 +133,12 @@ function handleViewAll(e: MouseEvent) {
 	{/if}
 
 	<div class="border-t border-line px-4 py-2">
-		<a
-			href="/aktivitaeten"
+		<button
+			type="button"
 			onclick={handleViewAll}
-			class="text-xs font-medium text-ink-2 transition-colors hover:text-ink"
+			class="min-h-[44px] px-1 text-xs font-medium text-ink-2 transition-colors hover:text-ink"
 		>
 			{m.chronik_view_all()}
-		</a>
+		</button>
 	</div>
 </div>

frontend/src/lib/notification/NotificationDropdown.svelte.test.ts

@@ -6,7 +6,10 @@ import NotificationDropdown from './NotificationDropdown.svelte';
 
 vi.mock('$app/navigation', () => ({ goto: vi.fn() }));
 
-afterEach(cleanup);
+afterEach(() => {
+	cleanup();
+	vi.clearAllMocks();
+});
 
 const makeNotification = (overrides: Record<string, unknown> = {}) => ({
 	id: 'n1',
@@ -156,7 +159,7 @@ describe('NotificationDropdown', () => {
 		expect(onMarkAllRead).toHaveBeenCalledOnce();
 	});
 
-	it('calls onClose when the view-all link is clicked', async () => {
+	it('calls onClose when the view-all button is clicked', async () => {
 		const onClose = vi.fn();
 		render(NotificationDropdown, {
 			props: {
@@ -167,14 +170,44 @@ describe('NotificationDropdown', () => {
 			}
 		});
 
-		const viewAllLink = page.getByRole('link', { name: /alle aktivitäten|view all/i });
-		await expect.element(viewAllLink).toHaveAttribute('href', '/aktivitaeten');
-		await viewAllLink.click();
+		await page.getByRole('button', { name: /alle aktivitäten|view all/i }).click();
 
 		expect(onClose).toHaveBeenCalledOnce();
+	});
+
+	it('navigates to /aktivitaeten when the view-all button is clicked', async () => {
+		render(NotificationDropdown, {
+			props: {
+				notifications: [],
+				onMarkRead: () => {},
+				onMarkAllRead: () => {},
+				onClose: () => {}
+			}
+		});
+
+		await page.getByRole('button', { name: /alle aktivitäten|view all/i }).click();
+
 		expect(goto).toHaveBeenCalledWith('/aktivitaeten');
 	});
 
+	it('calls onClose before navigating to /aktivitaeten', async () => {
+		const callOrder: string[] = [];
+		const onClose = vi.fn(() => callOrder.push('close'));
+		vi.mocked(goto).mockImplementation(() => callOrder.push('goto'));
+		render(NotificationDropdown, {
+			props: {
+				notifications: [],
+				onMarkRead: () => {},
+				onMarkAllRead: () => {},
+				onClose
+			}
+		});
+
+		await page.getByRole('button', { name: /alle aktivitäten|view all/i }).click();
+
+		expect(callOrder).toEqual(['close', 'goto']);
+	});
+
 	it('renders MENTION items with the mention verb text', async () => {
 		render(NotificationDropdown, {
 			props: {