Update authentication system, database models, and UI components

cleanup_remaining_orphaned.sql

@@ -0,0 +1,6 @@
+-- Cleanup remaining orphaned uploadlog entries for devuser
+DELETE FROM uploadlog WHERE uid = 'devuser';
+
+-- Verify cleanup
+SELECT 'All remaining uploadlog entries after cleanup:' as info;
+SELECT uid, filename, created_at FROM uploadlog ORDER BY created_at DESC;