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/types/user.types.ts

@@ -0,0 +1,36 @@
+/**
+ * User types and interfaces
+ */
+
+/**
+ * User type enumeration
+ */
+export type UserType = 'Admin' | 'User' | 'Guest'
+
+/**
+ * User information interface
+ */
+export interface UserInfo {
+  /** User ID */
+  id: number
+  /** Username */
+  username: string
+  /** User type */
+  userType: UserType
+  /** Create time */
+  createTime?: Date
+}
+
+/**
+ * User session interface
+ */
+export interface UserSession {
+  /** Current authenticated user */
+  user: UserInfo | null
+  /** Session token (optional for future use) */
+  token?: string
+  /** Login timestamp */
+  loginTime: Date
+  /** Whether session is active */
+  isActive: boolean
+}