fix: Install Playwright with system dependencies

Problem: Tests schlagen fehl mit 'Chromium distribution not found'

Lösung: npx playwright install --with-deps chromium
(installiert Chromium + alle benötigten System-Libraries)

Vorher: npx playwright install chromium (nur Browser, keine Deps)
Nachher: npx playwright install --with-deps chromium (Browser + Deps)

.gitea/workflows/test.yml

@@ -70,7 +70,7 @@ jobs:
       - name: Install Playwright
         run: |
           npm install -D @playwright/test
-          npx playwright install chromium
+          npx playwright install --with-deps chromium
 
       - name: Run Playwright tests
         env: