🔧 Restore frozen-lockfile for consistent CI builds

Keep pnpm-lock.yaml in version control and use --frozen-lockfile to ensure reproducible builds across all environments.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/code-quality.yml

@@ -32,7 +32,7 @@ jobs:
           cache: "pnpm"
 
       - name: Install dependencies
-        run: pnpm install --no-frozen-lockfile
+        run: pnpm install --frozen-lockfile
 
       - name: Check EditorConfig compliance
         uses: editorconfig-checker/action-editorconfig-checker@main