Require PLAYWRIGHT_REUSE_SERVER=true to reuse an existing Playwright server

Author: coderabbitai[bot]

playwright.config.js

@@ -33,8 +33,7 @@ export default defineConfig({
     command: 'bun run build && python3 scripts/serve-out.py',
     port: 8003,
     timeout: 300 * 1000,
-    // Locally (bun run build + serve-out.py already running) reuse the
-    // existing server; CI always gets a fresh build.
-    reuseExistingServer: !process.env.CI,
+    // Reuse a locally started server only when explicitly requested.
+    reuseExistingServer: process.env.PLAYWRIGHT_REUSE_SERVER === 'true',
   },
-});
+});