The profiles table previously lacked an index on the user_id column, causing full table scans during user lookups. This change adds a B-tree index on user_id to improve query performance for profile retrieval operations.
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.
- 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
