Add Admin sidebar tab with database/role management panels, role manager
workspace tab, and privilege dialogs. Backend provides 10 new Tauri
commands for CRUD on databases, roles, and privileges with read-only
mode enforcement. Context menus on schema tree nodes allow dropping
databases and viewing/granting table privileges.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
A.Shakhmatov
cebe2a307a