- Derives canBlogWrite in +layout.server.ts the same way as canAnnotate.
- Adds Geschichten link to AppNav (desktop + mobile, between Stammbaum and Admin).
- Adds error_geschichte_not_found mapping to errors.ts and translation keys
for the Geschichten index, detail, editor, and confirmation copy in
de/en/es.
- Adds isomorphic-dompurify-backed safeHtml() helper with allow-list
matching the backend OWASP policy (p/br/strong/em/h2/h3/ul/ol/li),
plus Vitest spec.
- Updates legacy spec test data so the new required canBlogWrite layout
prop type-checks.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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