docs(richtlinien): shorten prerender comment to essentials

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

frontend/src/lib/components/HelpPopover.svelte.spec.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect, afterEach, vi } from 'vitest';
 import { cleanup, render } from 'vitest-browser-svelte';
-import { page } from 'vitest/browser';
+import { page, userEvent } from 'vitest/browser';
 import HelpPopover from './HelpPopover.svelte';
 
 afterEach(cleanup);
@@ -51,16 +51,18 @@ describe('HelpPopover — open / close interactions', () => {
 		await vi.waitFor(() => expect(document.querySelector('[role="region"]')).toBeNull());
 	});
 
-	it('opens on Enter key (button is keyboard-reachable, Enter fires click)', async () => {
+	it('opens on Enter key', async () => {
 		renderPopover();
-		await page.getByRole('button', { name: /Help/ }).click();
-		expect(document.querySelector('[role="region"]')).not.toBeNull();
+		(document.querySelector('button[aria-expanded]') as HTMLButtonElement).focus();
+		await userEvent.keyboard('{Enter}');
+		await vi.waitFor(() => expect(document.querySelector('[role="region"]')).not.toBeNull());
 	});
 
-	it('opens on Space key (button is keyboard-reachable, Space fires click)', async () => {
+	it('opens on Space key', async () => {
 		renderPopover();
-		await page.getByRole('button', { name: /Help/ }).click();
-		expect(document.querySelector('[role="region"]')).not.toBeNull();
+		(document.querySelector('button[aria-expanded]') as HTMLButtonElement).focus();
+		await userEvent.keyboard('{Space}');
+		await vi.waitFor(() => expect(document.querySelector('[role="region"]')).not.toBeNull());
 	});
 });
 

frontend/src/routes/hilfe/transkription/+page.ts

@@ -1,6 +1,3 @@
-// prerender = true is safe here: hooks.server.ts exports
-//   handle = sequence(userGroup, handleAuth, ...)
-// where handleAuth redirects all non-public paths to /login at runtime.
-// Prerendered HTML is served, but the browser still hits handleAuth on
-// every navigation — unauthenticated users are redirected before seeing content.
+// Safe: handleAuth in hooks.server.ts redirects unauthenticated requests
+// before prerendered HTML is visible.
 export const prerender = true;