CI: re-enable macOS Godot tests, fix timeout command

macOS doesn't have GNU timeout. The issue wasn't headless Godot
failing to load plugins -- it was the timeout command not existing
(exit 127), so Godot never started. Removed timeout usage on
macOS and Windows. The ci-godot-tests script already has its own
polling timeout for session connection.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: dsarno

.github/workflows/ci.yml

@@ -66,9 +66,43 @@ jobs:
       - name: Run handler tests
         run: bash script/ci-godot-tests
 
-  # macOS headless Godot doesn't load editor plugins reliably on CI runners.
-  # GDScript handler behavior is platform-independent — covered by Linux + Windows.
-  # macOS Python tests (Tier 1) still run above.
+  godot-tests-macos:
+    name: Godot tests / macOS
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: chickensoft-games/setup-godot@v2
+        with:
+          version: 4.6.2
+          use-dotnet: false
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install dependencies
+        run: pip install -e ".[dev]"
+
+      - name: Start MCP server
+        run: |
+          python -m godot_ai --transport streamable-http --port 8000 &
+          for i in $(seq 1 30); do
+            curl -s -o /dev/null http://127.0.0.1:8000/mcp -X POST \
+              -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \
+              -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"ci","version":"1.0"}}}' && echo "Server ready" && break
+            sleep 1
+          done
+
+      - name: Start Godot editor (headless)
+        run: |
+          godot --headless --path test_project --import || true
+          godot --headless --path test_project --editor &
+
+      - name: Run handler tests
+        run: bash script/ci-godot-tests
 
   godot-tests-windows:
     name: Godot tests / Windows
@@ -104,8 +138,8 @@ jobs:
       - name: Start Godot editor (headless)
         shell: bash
         run: |
-          timeout 30 godot --headless --path test_project --import || true
-          timeout 120 godot --headless --path test_project --editor &
+          godot --headless --path test_project --import || true
+          godot --headless --path test_project --editor &
 
       - name: Run handler tests
         shell: bash