✨ 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.

tests/e2e-admin/pagebuilder.spec.ts

@@ -0,0 +1,21 @@
+import { test, expect, openContentEntry } from "./fixtures"
+
+test.describe("Admin pagebuilder registry and preview rendering", () => {
+    test("renders seeded image-backed blocks through the configured pagebuilder registry", async ({ page }) => {
+        await openContentEntry(page, /Playwright Pagebuilder Preview/)
+
+        const previewRoot = page.locator("[data-admin-preview]")
+        const heroPreview = previewRoot.locator("[data-block='hero']").first()
+        const richtextPreview = previewRoot.locator("[data-block='richtext']").first()
+
+        await expect(previewRoot.first()).toBeVisible()
+        await expect(heroPreview.getByRole("heading", { name: "Playwright Registry Hero" })).toBeVisible()
+        await expect(richtextPreview).toContainText("Richtext mit Bild")
+        await expect(richtextPreview).toContainText("dass ein image-gestuetzter Preview-Block")
+
+        const previewImages = previewRoot.locator("img[data-entry-id]")
+        await expect(previewImages.first()).toBeVisible()
+        await expect(previewImages.first()).toHaveAttribute("src", /\/medialib\/[^/]+\/file\/[^?]+(?:\?filter=[^"']+)?/)
+        await expect(previewImages).toHaveCount(2)
+    })
+})