The new index on the `user_id` column in the `profiles` table improves query performance when filtering or joining by user identifier, reducing full table scans during authentication and profile retrieval operations.
The profiles table previously lacked an index on the user_id column, causing full table scans during user profile retrieval. This change adds a B-tree index on user_id to optimize query performance for profile lookups by user identifier.
- Inserted <meta name="description"> tag with site summary
- Added Open Graph (og:title, og:description, og:image) and Twitter Card meta tags to index.html head
- Ensures search engines and social platforms display rich previews
