ci: add system dependencies (gtk/glib) to integration-tests and e2e-tests jobs

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Co-authored-by: rexlunae <6726134+rexlunae@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -141,6 +141,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+      - name: Install Linux system dependencies for desktop GUI
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev
       - uses: Swatinem/rust-cache@v2
 
       - name: Build debug binary
@@ -159,6 +163,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+      - name: Install Linux system dependencies for desktop GUI
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev
       - uses: Swatinem/rust-cache@v2
 
       - name: Build release binary