Fix UI test CI and gate release on UI tests (#25)

- Add missing CI deps: dbus-x11, gir1.2-gtk-3.0, xdotool
- Add workflow_call trigger so release pipeline can invoke UI tests
- Remove duplicate Rust test step (already run by ci job)
- Release pipeline: checks → ci → ui-tests → publish

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: joske

.github/workflows/publish.yml

@@ -48,8 +48,11 @@ jobs:
   ci:
     needs: checks
     uses: ./.github/workflows/ci.yml
-  publish:
+  ui-tests:
     needs: ci
+    uses: ./.github/workflows/ui-tests.yml
+  publish:
+    needs: ui-tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6

.github/workflows/ui-tests.yml

@@ -2,6 +2,7 @@ name: UI Integration Tests
 
 on:
   workflow_dispatch:
+  workflow_call:
 
 jobs:
   ui-tests:
@@ -19,7 +20,10 @@ jobs:
             at-spi2-core \
             python3-pip \
             python3-gi \
-            gir1.2-atspi-2.0
+            gir1.2-atspi-2.0 \
+            gir1.2-gtk-3.0 \
+            dbus-x11 \
+            xdotool
 
       - name: Install Rust toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
@@ -35,12 +39,6 @@ jobs:
           python3 -m venv --system-site-packages tests/ui_integration/.venv
           tests/ui_integration/.venv/bin/pip install -r tests/ui_integration/requirements.txt
 
-      - name: Run Rust tests under Xvfb
-        env:
-          GDK_BACKEND: x11
-          GTK_A11Y: none
-        run: xvfb-run -a cargo test --all-targets --locked
-
       - name: Run dogtail integration tests
         env:
           GDK_BACKEND: x11