chore: add fluxbox to desktop build

.github/workflows/build-desktop-release.yml

@@ -204,8 +204,19 @@ jobs:
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: true
 
+      - name: Install Fluxbox
+        run: sudo apt-get update && sudo apt-get install -y fluxbox
+
+      # Emulate a virtual framebuffer on machines with no display hardware
+      - name: Run XVFB
+        run: Xvfb :1 -screen 0 1024x768x24 >/dev/null 2>&1 &
+
+      # Start a lightweight window manager to simulate window actions (maximize,restore etc)
+      - name: Start Fluxbox
+        run:  DISPLAY=:1.0 fluxbox >/dev/null 2>&1 &
+
       - name: Run Playwright test
-        run: xvfb-run -- npx playwright test --reporter github --shard=${{ matrix.shard }}/3
+        run: DISPLAY=:1.0 npx playwright test --reporter github --shard=${{ matrix.shard }}/3
         env:
           LOGSEQ_CI: true
           DEBUG: "pw:api"