- Filter empty strings from STRING_AGG/LISTAGG splits in SQL Server, Oracle, MySQL
- Emit INCLUDE clause only for PostgreSQL and SQL Server (not MySQL/SQLite)
- Emit WHERE clause only for PostgreSQL, SQL Server, SQLite (not MySQL)
- Replace index type free-text input with dropdown for all 5 database types
- Fix hardcoded column count in resize handle (use indexColLabels.length - 1)
- Fix pg_get_indexdef type mismatch: cast k.n from bigint to integer