fix(ci): install system dependencies and fix Playwright port conflict

This commit fixes two CI failures:

1. Install required system dependencies (libgtk-3-dev, libwebkit2gtk-4.0-dev, etc.)
   for Rust builds on Ubuntu. These are needed by Tauri's GTK dependencies.

2. Remove manual dev server start from Playwright job. The Playwright config
   already has webServer configured to start/stop the dev server automatically,
   so the manual start was causing port conflicts.

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

Author: pythoninthegrass

.github/workflows/test.yml

@@ -32,12 +32,6 @@ jobs:
       - name: Install Playwright browsers
         run: npx playwright install --with-deps chromium
 
-      - name: Start dev server in background
-        working-directory: ./app/frontend
-        run: |
-          npm run dev &
-          npx wait-on http://localhost:5173 --timeout 120000
-
       - name: Run Playwright tests
         working-directory: ./app/frontend
         run: npx playwright test
@@ -132,6 +126,16 @@ jobs:
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libgtk-3-dev \
+            libwebkit2gtk-4.0-dev \
+            libayatana-appindicator3-dev \
+            librsvg2-dev \
+            libasound2-dev
+
       - name: Cache Rust dependencies
         uses: Swatinem/rust-cache@v2
         with:
@@ -176,6 +180,16 @@ jobs:
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libgtk-3-dev \
+            libwebkit2gtk-4.0-dev \
+            libayatana-appindicator3-dev \
+            librsvg2-dev \
+            libasound2-dev
+
       - name: Cache Rust dependencies
         uses: Swatinem/rust-cache@v2
         with: