fix(e2e): fix admin tag test (use existing tag) and annotation locator

- Admin tag test: "Familie" never existed in the database; use "Fest"
  which is a real seeded tag, with a matching rename-back to restore state
- Annotation hash test: the broad `[data-testid^="annotation-"]` locator
  also matched `annotation-side-panel` (always in DOM, even when
  off-screen); extend the :not() exclusion list to cover it

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

frontend/e2e/admin.spec.ts

@@ -180,19 +180,19 @@ test.describe('Admin — tag management', () => {
 		// Wait for the tags list to render after the tab switch
 		await page.waitForSelector('ul > li');
 
-		// Hover over the "Familie" row to reveal the opacity-0 action buttons
+		// Hover over the "Fest" row to reveal the opacity-0 action buttons
-		const familieRow = page
+		const festRow = page
 			.locator('ul > li')
-			.filter({ has: page.locator('span', { hasText: /^Familie$/ }) });
+			.filter({ has: page.locator('span', { hasText: /^Fest$/ }) });
-		await familieRow.hover();
+		await festRow.hover();
-		await familieRow.getByRole('button', { name: 'Schlagwort bearbeiten' }).click();
+		await festRow.getByRole('button', { name: 'Schlagwort bearbeiten' }).click();
 
 		// After clicking edit, {#if editingTagId} replaces the span with a form —
-		// the familieRow filter no longer matches, so we find the input directly.
+		// the festRow filter no longer matches, so we find the input directly.
-		await page.locator('input[name="name"]').fill('Familie (E2E)');
+		await page.locator('input[name="name"]').fill('Fest (E2E)');
 		await page.getByRole('button', { name: 'Speichern' }).click();
 
-		await expect(page.getByText('Familie (E2E)')).toBeVisible();
+		await expect(page.getByText('Fest (E2E)')).toBeVisible();
 		await page.screenshot({ path: 'test-results/e2e/admin-tag-renamed.png' });
 	});
 
@@ -205,14 +205,14 @@ test.describe('Admin — tag management', () => {
 
 		const renamedRow = page
 			.locator('ul > li')
-			.filter({ has: page.locator('span', { hasText: /^Familie \(E2E\)$/ }) });
+			.filter({ has: page.locator('span', { hasText: /^Fest \(E2E\)$/ }) });
 		await renamedRow.hover();
 		await renamedRow.getByRole('button', { name: 'Schlagwort bearbeiten' }).click();
 
-		await page.locator('input[name="name"]').fill('Familie');
+		await page.locator('input[name="name"]').fill('Fest');
 		await page.getByRole('button', { name: 'Speichern' }).click();
 
-		await expect(page.getByText('Familie')).toBeVisible();
+		await expect(page.getByText('Fest')).toBeVisible();
 		await page.screenshot({ path: 'test-results/e2e/admin-tag-restored.png' });
 	});
 });

frontend/e2e/documents.spec.ts

@@ -461,9 +461,11 @@ test.describe('PDF annotations — file hash versioning', () => {
 		await page.waitForSelector('[data-hydrated]');
 		await page.locator('canvas').first().waitFor({ state: 'visible', timeout: 20000 });
 
-		// Use :not() to exclude the outdated-notice element whose testid also starts with "annotation-"
+		// Use :not() to exclude the outdated-notice and side-panel elements whose testid also starts with "annotation-"
 		await expect(
-			page.locator('[data-testid^="annotation-"]:not([data-testid="annotation-outdated-notice"])')
+			page.locator(
+				'[data-testid^="annotation-"]:not([data-testid="annotation-outdated-notice"]):not([data-testid="annotation-side-panel"])'
+			)
 		).toHaveCount(0, { timeout: 8000 });
 		await expect(page.locator('[data-testid="annotation-outdated-notice"]')).toBeVisible({
 			timeout: 5000