fix: resolve CI e2e test ETIMEDOUT errors when downloading VS Code

- Add caching for VS Code test runtime to prevent re-downloads
- Pin VS Code version to 1.101.2 for deterministic caching
- Add pre-download step to isolate download failures from test failures
- Configure version via VSCODE_VERSION environment variable

This fixes the network timeout issues occurring when @vscode/test-electron
attempts to download VS Code from Microsoft's CDN during CI runs.

Author: daniel-lxs

.github/workflows/code-qa.yml

@@ -86,6 +86,27 @@ jobs:
             - name: Create .env.local file
               working-directory: apps/vscode-e2e
               run: echo "OPENROUTER_API_KEY=${{ secrets.OPENROUTER_API_KEY }}" > .env.local
+            - name: Set VS Code test version
+              run: echo "VSCODE_VERSION=1.101.2" >> $GITHUB_ENV
+            - name: Cache VS Code test runtime
+              uses: actions/cache@v4
+              with:
+                  path: apps/vscode-e2e/.vscode-test
+                  key: ${{ runner.os }}-vscode-test-${{ env.VSCODE_VERSION }}
+                  restore-keys: |
+                      ${{ runner.os }}-vscode-test-
+            - name: Pre-download VS Code test runtime
+              working-directory: apps/vscode-e2e
+              run: |
+                  node -e "
+                  const { downloadAndUnzipVSCode } = require('@vscode/test-electron');
+                  downloadAndUnzipVSCode({ version: process.env.VSCODE_VERSION || '1.101.2' })
+                    .then(() => console.log('✅ VS Code test runtime downloaded successfully'))
+                    .catch(err => {
+                      console.error('❌ Failed to download VS Code:', err);
+                      process.exit(1);
+                    });
+                  "
             - name: Run integration tests
               working-directory: apps/vscode-e2e
               run: xvfb-run -a pnpm test:ci

apps/vscode-e2e/src/runTest.ts

@@ -38,6 +38,7 @@ async function main() {
 			extensionTestsPath,
 			launchArgs: [testWorkspace],
 			extensionTestsEnv,
+			version: process.env.VSCODE_VERSION || "1.101.2",
 		})
 
 		// Clean up the temporary workspace