ci: Install Playwright system dependencies

Ubuntu runner needs X11 and browser libraries for Playwright.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: MaxDaten

.github/workflows/main.yml

@@ -18,6 +18,12 @@ jobs:
       - name: Install devenv.sh
         run: nix profile add nixpkgs#devenv
       - run: devenv shell build
+      - name: Install Playwright dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libnss3 libnspr4 libatk1.0-0 libatk-bridge2.0-0 \
+            libcups2 libdrm2 libxkbcommon0 libatspi2.0-0 libxcomposite1 \
+            libxdamage1 libxfixes3 libxrandr2 libgbm1 libasound2
       - name: Install Playwright browsers
         run: devenv shell -- shot-scraper install
       - name: Generate screenshots