Keep agent browser tabs connected across workspace switches (#2156)

* fix(desktop): keep browser tabs connected across workspaces

Electron can replace a guest WebContents when a retained browser tab is reparented. Re-register each attachment and keep background actionability checks running so agent browser tools retain the tab through workspace eviction.\n\nCover the full app, daemon, Electron, and MCP path in the existing desktop CI job.

* fix(desktop): launch Electron E2E reliably on Linux

CI Electron must receive --no-sandbox before the app starts because the hosted runner cannot use Electron's bundled SUID sandbox helper. Forward explicit dev-runner arguments and fail readiness waits as soon as a child exits.

* fix(desktop): preserve active browser on repeated registration

* fix(desktop): keep browser keyboard attachment idempotent

* fix(desktop): wait for E2E bridge readiness

* fix(desktop): close E2E logs after output drains

.github/workflows/ci.yml

@@ -160,10 +160,29 @@ jobs:
       - name: Run desktop tests
         run: npm run test --workspace=@getpaseo/desktop
 
+      - name: Build app dependencies for desktop E2E
+        if: matrix.os == 'ubuntu-latest'
+        run: npm run build:app-deps
+
       - name: Install virtual display
-        if: matrix.os == 'ubuntu-latest' && steps.desktop_changes.outputs.desktop == 'true'
+        if: matrix.os == 'ubuntu-latest'
         run: sudo apt-get update && sudo apt-get install -y xvfb xauth
 
+      - name: Run real Electron browser tab bridge E2E
+        if: matrix.os == 'ubuntu-latest'
+        run: npm run test:e2e:browser-tab-bridge --workspace=@getpaseo/desktop
+        env:
+          PASEO_TAB_BRIDGE_E2E_ARTIFACT_DIR: ${{ runner.temp }}/browser-tab-bridge-e2e
+
+      - name: Upload browser tab bridge diagnostics
+        uses: actions/upload-artifact@v4
+        if: failure() && matrix.os == 'ubuntu-latest'
+        with:
+          name: browser-tab-bridge-e2e
+          path: ${{ runner.temp }}/browser-tab-bridge-e2e
+          if-no-files-found: ignore
+          retention-days: 7
+
       - name: Build and smoke unpacked desktop app
         if: matrix.os == 'ubuntu-latest' && steps.desktop_changes.outputs.desktop == 'true'
         run: npm run build:desktop -- --publish never --linux --x64 --dir