fix(tests): fix 2 more pre-existing vitest-browser spec failures

TranscriptionEditView: fix 4 failing tests:
- textarea → [role="textbox"] selector (editor is contenteditable, not <textarea>)
- button clicks → dispatchEvent(MouseEvent) for reliable Svelte 5 onclick with TipTap
- mentionedPersons test: init block with @mention token so deserialize() creates a
  mention node; use userEvent.type + vi.waitFor (real timers) instead of fill +
  fake timers, which prevents TipTap onUpdate from firing the debounce timer

EntityNavSection: anchor link click → add capture-phase preventDefault before
clicking to stop iframe navigation while allowing Svelte onclick handler to run

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

frontend/src/lib/document/transcription/TranscriptionEditView.svelte.spec.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, vi, afterEach } from 'vitest';
 import { cleanup, render } from 'vitest-browser-svelte';
-import { page } from 'vitest/browser';
+import { page, userEvent } from 'vitest/browser';
 import TranscriptionEditView from './TranscriptionEditView.svelte';
 import { createConfirmService, CONFIRM_KEY } from '$lib/shared/services/confirm.svelte.js';
 
@@ -148,24 +148,28 @@ describe('TranscriptionEditView — auto-save debounce', () => {
 	});
 
 	it('passes the block mentionedPersons array as the 3rd save argument', async () => {
-		vi.useFakeTimers();
 		const onSaveBlock = vi.fn().mockResolvedValue(undefined);
 		const blockWithMention = {
 			...block1,
+			// text must contain the @displayName token so deserialize() creates a mention node;
+			// fill() replaces the whole content with plain text and would destroy the node
+			text: '@Auguste Raddatz',
 			mentionedPersons: [{ personId: 'p-aug', displayName: 'Auguste Raddatz' }]
 		};
 		renderView({ blocks: [blockWithMention], onSaveBlock });
 
-		const textarea = page.getByRole('textbox').first();
+		// type() focuses the element (cursor at position 0) then inserts without replacing the
-		await textarea.fill('Hallo @Auguste Raddatz');
+		// existing mention node.  Fake timers interfere with keyboard CDP so use real timers
+		// + vi.waitFor to catch the 1500 ms debounce.
+		await userEvent.type(page.getByRole('textbox').first(), 'Hallo ');
 
-		vi.advanceTimersByTime(1500);
+		await vi.waitFor(
-		await vi.runAllTimersAsync();
+			() =>
-
+				expect(onSaveBlock).toHaveBeenCalledWith('b1', 'Hallo @Auguste Raddatz', [
-		expect(onSaveBlock).toHaveBeenCalledWith('b1', 'Hallo @Auguste Raddatz', [
+					{ personId: 'p-aug', displayName: 'Auguste Raddatz' }
-			{ personId: 'p-aug', displayName: 'Auguste Raddatz' }
+				]),
-		]);
+			{ timeout: 3000 }
-		vi.useRealTimers();
+		);
 	});
 
 	it('resets debounce timer on rapid successive changes', async () => {
@@ -238,8 +242,9 @@ describe('TranscriptionEditView — flush on blur', () => {
 		const textarea = page.getByRole('textbox').first();
 		await textarea.fill('Blur text');
 
-		// Blur before 1500ms debounce fires — locator.blur() not available, use native DOM
+		// Blur before 1500ms debounce fires — locator.blur() not available, use native DOM.
-		const el = document.querySelector('textarea') as HTMLTextAreaElement;
+		// PersonMentionEditor uses a contenteditable div (role=textbox), not a <textarea>.
+		const el = document.querySelector('[role="textbox"]') as HTMLElement;
 		el.dispatchEvent(new FocusEvent('blur', { bubbles: true }));
 
 		await vi.runAllTimersAsync();
@@ -335,7 +340,12 @@ describe('TranscriptionEditView — mark all reviewed', () => {
 			onMarkAllReviewed
 		});
 
-		await page.getByRole('button', { name: /Alle als fertig markieren/ }).click();
+		// userEvent.click() via Playwright CDP doesn't reliably trigger Svelte 5 onclick
+		// handlers when a TipTap editor is mounted in the same component tree.
+		const btn = (await page
+			.getByRole('button', { name: /Alle als fertig markieren/ })
+			.element()) as HTMLButtonElement;
+		btn.dispatchEvent(new MouseEvent('click', { bubbles: true, cancelable: true }));
 		await vi.waitFor(() => expect(onMarkAllReviewed).toHaveBeenCalledTimes(1));
 	});
 
@@ -349,9 +359,14 @@ describe('TranscriptionEditView — mark all reviewed', () => {
 			onMarkAllReviewed
 		});
 
-		const btn = page.getByRole('button', { name: /Alle als fertig markieren/ });
+		// Same CDP click workaround: dispatch from browser JS to reliably fire Svelte 5 onclick
-		await btn.click();
+		const btnEl = (await page
-		await expect.element(btn).toBeDisabled();
+			.getByRole('button', { name: /Alle als fertig markieren/ })
+			.element()) as HTMLButtonElement;
+		btnEl.dispatchEvent(new MouseEvent('click', { bubbles: true, cancelable: true }));
+		await expect
+			.element(page.getByRole('button', { name: /Alle als fertig markieren/ }))
+			.toBeDisabled();
 		resolveMarkAll();
 	});
 });

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

@@ -134,7 +134,13 @@ describe('EntityNavSection — flyout variant', () => {
 				called = true;
 			}
 		});
-		document.querySelector<HTMLAnchorElement>('a[href="/admin/users"]')!.click();
+		const link = document.querySelector<HTMLAnchorElement>('a[href="/admin/users"]')!;
+		// Prevent the browser from navigating the test iframe to /admin/users (which
+		// would redirect to /login and kill the iframe connection).  preventDefault()
+		// on the capture phase suppresses navigation while still letting the Svelte
+		// onclick handler (onFlyoutClick) run on the bubbling phase.
+		link.addEventListener('click', (e) => e.preventDefault(), { capture: true, once: true });
+		link.click();
 		expect(called).toBe(true);
 	});
 });