- Extract JDBC driver/plugin logic from Tauri commands to dbx-core::jdbc
- Add web API routes for JDBC drivers, JDBC plugin, Agent JAR import, system fonts
- Upgrade zip crate from v2 to v4 in dbx-core
- Replace http.ts stubs with real HTTP calls (support File and string paths)
- Remove isWeb restrictions in DriverStoreDialog, add browser file picker support
- Fix Mac traffic light inset incorrectly applied on web version
- Show driver management toolbar button on web version