feat: normalize email addresses to lowercase in user registration and profile updates

- Updated user registration and profile update handlers to convert email addresses to lowercase before saving to the database.
- Added integration tests to verify login functionality after email changes, ensuring case insensitivity.
- Introduced a new Account page to replace the Security page, consolidating user account management features.
- Removed the old Security page and updated routing in the Settings layout.
- Enhanced the SystemStatus component to provide user feedback on update availability.
- Added password change functionality in the Account page, allowing users to update their passwords securely.

frontend/src/context/AuthContextValue.ts

@@ -3,12 +3,15 @@ import { createContext } from 'react';
 export interface User {
   user_id: number;
   role: string;
+  name?: string;
+  email?: string;
 }
 
 export interface AuthContextType {
   user: User | null;
   login: () => Promise<void>;
   logout: () => void;
+  changePassword: (oldPassword: string, newPassword: string) => Promise<void>;
   isAuthenticated: boolean;
   isLoading: boolean;
 }