chore: fix build warnings, add deployment config, and cleanup lint errors

- Fix React Hook dependencies and Image optimization warnings
- Add DATA_DIR and INITIAL_PASSWORD env var support
- Fix Tailwind v4 legacy syntax and suppress CSS directives warnings
- Add PropTypes and remove unused variables

src/shared/utils/api.js

@@ -88,5 +88,6 @@ async function handleResponse(response) {
   return data;
 }
 
-export default { get, post, put, del };
+const api = { get, post, put, del };
+export default api;