✨ feat: enhance medialib image handling and add asset URL resolution

- Implemented `resolveApiAssetUrl` function to normalize asset URLs based on API base.
- Updated `MedialibImage` component to utilize new asset URL resolution and added support for alt text and class properties.
- Enhanced image loading behavior with improved width measurement and focal point handling.
- Added placeholder image handling and improved accessibility with alt text.
- Introduced new test script for auditing broken links in skill documentation.
- Expanded seeded test content to include medialib entries and updated related tests for pagebuilder previews.
- Improved global setup and teardown logging for clarity on seeded content management.

api/hooks/ssr/AGENTS.md

@@ -2,6 +2,14 @@
 
 Server-side rendering via goja (Go JS runtime) with HTML caching.
 
+For the full workflow, prefer the `tibi-ssr-caching` skill.
+
+## Related skills
+
+- `frontend-architecture` when SSR changes interact with route loading, i18n, or `App.svelte` data flow.
+- `media-seo-publishing` when SSR output includes image URLs, SEO metadata, or publication timing.
+- `tibi-hook-authoring` when SSR changes depend on neighboring hook behavior such as public filtering or cache invalidation.
+
 ## Request flow
 
 1. `get_read.js` receives the request and calls `lib/ssr-server.js`.
@@ -11,6 +19,8 @@ Server-side rendering via goja (Go JS runtime) with HTML caching.
 5. During SSR, `App.svelte` calls the same `loadContent(...)` path directly inside `typeof window === "undefined"`.
 6. Rendered HTML is stored in the `ssr` collection together with dependency tracking strings.
 
+Keep browser and SSR content loading on the same application path whenever possible. Do not fork a second data-loading model for SSR unless the current architecture explicitly requires it.
+
 ## Build
 
 - SSR bundle is built via `yarn build:server` and outputs to `lib/app.server.js`.
@@ -29,6 +39,7 @@ Server-side rendering via goja (Go JS runtime) with HTML caching.
 - SSR route validation is active in `config.js`.
 - Public page URLs are language-prefixed (`/de/...`, `/en/...`), while `content.path` in the DB is stored without that prefix.
 - `ssrValidatePath()` must strip the language prefix before querying content and return a canonical language-prefixed URL when needed.
+- If route validation changes, inspect `api/hooks/config.js`, `filter_public.js`, and the frontend route-loading path together instead of patching only one side.
 
 ## 404 signaling
 
@@ -37,3 +48,8 @@ The SSR hook (`get_read.js`) checks `context.is404` after rendering to determine
 `NotFound.svelte` sets `context.is404 = true` during SSR. When the component renders (only when the page is not found), its top-level script sets the flag. The goja runtime provides `context` as a global during SSR, so it's available from the compiled frontend code.
 
 When adding a 404 page or changing the not-found logic, ensure `context.is404` is still set during SSR.
+
+## Related validation
+
+- After SSR changes, run `yarn build:server` plus the narrowest reachable SSR/public-read check.
+- If caching or publication behavior changed, also rerun the relevant mutation-side invalidation check instead of relying on HTML diffing alone.