Implement User Management UI (Phase 11 P0 #1)

User Management Features:
- Users.vue: Complete user CRUD interface
- Tauri commands: 5 auth user endpoints
- REST API: DataProvider trait extensions

UI Components:
- User list table (username, home_dir, status)
- Create user dialog (username, password, home_dir, status)
- Edit user dialog (password optional, home_dir, status)
- Delete user confirmation
- Reset password prompt

Tauri Commands (renamed to avoid conflict):
- list_auth_users: List all users from auth database
- create_auth_user: Create user with bcrypt password
- update_auth_user: Update user (optional password)
- delete_auth_user: Delete user
- reset_auth_password: Reset password

DataProvider Trait Extensions:
- list_users(): List all users
- create_user(): Create user with password
- update_user(): Update user (optional password)
- delete_user(): Delete user
- reset_password(): Reset password

Implementations:
- SqliteProvider: Full implementation (sftpgo_users table)
- PgProvider: Full implementation (users table)

Router:
- Added /users route

Home.vue:
- Added User Management card

Build: ✅ Tauri + markbase-core
Tests: 495 markbase-core + 201 smb-server

markbase-tauri/src-tauri/src/main.rs

@@ -42,6 +42,11 @@ fn main() {
             get_backup_config,
             set_backup_config,
             run_backup,
+            list_auth_users,
+            create_auth_user,
+            update_auth_user,
+            delete_auth_user,
+            reset_auth_password,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");