feat: implement user authentication system

- Add SessionManager for managing user sessions (singleton pattern)
- Add BIPUsersDAO for database authentication
- Add LoginDialog component for username/password login
- Add UserSelectionDialog component for admin user selection
- Support silent login by computer name
- Implement main page with navigation to Extractor and Cleaner

Database:
- Table: dbo_BIPUsers
- Fields: UserName, Password, UserType, ComputerNmae

UI Flow:
1. Silent login on startup via computer name
2. Show login dialog if silent login fails
3. Display main page with user info and navigation
4. Support logout and re-login

src/main/ipc/index.ts

@@ -8,6 +8,7 @@ import { registerExtractorHandlers } from './extractor-handler'
 import { registerCleanerHandlers } from './cleaner-handler'
 import { registerDatabaseHandlers } from './database-handler'
 import { registerResolverHandlers } from './resolver-handler'
+import { registerAuthHandlers } from './auth-handler'
 
 /**
  * Register all IPC handlers
@@ -18,4 +19,5 @@ export function registerIpcHandlers(): void {
   registerCleanerHandlers()
   registerDatabaseHandlers()
   registerResolverHandlers()
+  registerAuthHandlers()
 }