fix: enable screen recording and non-headless Playwright on all platforms

Run Playwright without --headless on macOS/Windows so the browser window
is visible for screen capture. Restore avfoundation (macOS) and gdigrab
(Windows) recording steps. Remove 2>/dev/null from ffmpeg to surface
errors in CI logs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/qa-claude.yaml

@@ -89,20 +89,34 @@ jobs:
           echo $! > "${{ runner.temp }}/ffmpeg.pid"
           sleep 1
 
-      # Note: Screen recording is only available on Linux (Xvfb provides a
-      # virtual display). On macOS/Windows, Playwright runs --headless so
-      # there is no visible browser to capture.
+      # --- Recording: macOS (avfoundation) ---
+      - name: Start recording (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          mkdir -p "$QA_ARTIFACTS"
+          ffmpeg -y -f avfoundation -framerate 10 -capture_cursor 1 \
+            -i "1:none" -c:v libx264 -preset ultrafast -crf 28 \
+            -pix_fmt yuv420p "$QA_ARTIFACTS/qa-session.mp4" &
+          echo $! > "${{ runner.temp }}/ffmpeg.pid"
+          sleep 1
+
+      # --- Recording: Windows (gdigrab) ---
+      - name: Start recording (Windows)
+        if: runner.os == 'Windows'
+        shell: bash
+        run: |
+          mkdir -p "$QA_ARTIFACTS"
+          ffmpeg -y -f gdigrab -framerate 10 -i desktop \
+            -c:v libx264 -preset ultrafast -crf 28 \
+            -pix_fmt yuv420p "$QA_ARTIFACTS/qa-session.mp4" &
+          echo $! > "${{ runner.temp }}/ffmpeg.pid"
+          sleep 1
 
       - name: Create MCP config
         shell: bash
         run: |
-          if [ "$RUNNER_OS" = "Linux" ]; then
-            ARGS='["@playwright/mcp@0.0.68"]'
-          else
-            ARGS='["@playwright/mcp@0.0.68", "--headless"]'
-          fi
           cat > "${{ runner.temp }}/mcp-config.json" <<EOF
-          {"mcpServers":{"playwright":{"command":"npx","args":${ARGS}}}}
+          {"mcpServers":{"playwright":{"command":"npx","args":["@playwright/mcp@0.0.68"]}}}
           EOF
 
       - name: Write QA prompt