Fix .gitignore patterns to be more specific

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -10,13 +10,12 @@ package-lock.json
 dist/
 build/
 *.tsbuildinfo
-*.d.ts
-*.d.ts.map
-*.js
-*.js.map
 
-# Keep specific config files
-!*.config.js
+# TypeScript build artifacts in root (if any)
+/*.js
+/*.js.map
+/*.d.ts
+/*.d.ts.map
 
 # Environment files
 .env