When an Admin user logs in, display a centered dialog allowing them to
select which user identity to use for the session. The Admin adopts the
selected user's permissions and operates as that user throughout the session.
Changes:
- Add UserSelectionDialog class in gui/user_selection_dialog.py
- Add SessionManager.switch_user() method to switch user identity
- Add SessionManager.get_original_admin() method to retrieve original admin
- Update MainWindow status bar to show when Admin operates as another user
- Display format: "当前用户: {username} ({type}) - 以 {admin_username} 身份登录"
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Implement automatic authentication based on computer name to enable
passwordless login for registered computers with fallback to manual
authentication.
Changes:
- Add SessionManager.login_by_computer_name() for silent login attempt
- Add BIPUsersDAO.authenticate_by_computer_name() for computer name lookup
- Update BIPUsersDAO.create_user() to support optional computer_name parameter
- Update main_ui.py to try silent login before showing login dialog
- Display current computer name in login dialog for user reference
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add user login system with role-based access control:
- Admin users see all data and can filter by any manager
- Regular users only see records where ManagerName matches their username
New components:
- BIPUsersDAO: user authentication and management
- SessionManager: singleton session state management
- LoginDialog: modal login UI for app startup
- init_users.sql: initial user setup script
Permission enforcement:
- Material validation tab: hide manager filter for non-admin, force filter by current user
- Material type management: hide filter UI for non-admin, filter at database level
- Window title and status bar display current user info
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
