Fix authentication state persistence and admin role display

- Implement complete authentication system with JWT token validation
- Add auth provider with persistent login state across page refreshes
- Create multilingual login/register forms with Material-UI components
- Fix token validation using raw SQL queries to bypass Prisma sync issues
- Add comprehensive error handling for expired/invalid tokens
- Create profile and settings pages with full i18n support
- Add proper user role management (admin/user) with database sync
- Implement secure middleware with CSRF protection and auth checks
- Add debug endpoints for troubleshooting authentication issues
- Fix Zustand store persistence for authentication state

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

messages/en.json

@@ -195,6 +195,80 @@
       }
     }
   },
+  "auth": {
+    "email": "Email",
+    "password": "Password",
+    "confirmPassword": "Confirm password",
+    "name": "Name",
+    "optional": "(optional)",
+    "login": "Login",
+    "register": "Register",
+    "logout": "Logout",
+    "logging_in": "Logging in...",
+    "registering": "Registering...",
+    "loginError": "Login error",
+    "registerError": "Registration error",
+    "connectionError": "Connection error",
+    "passwordMismatch": "Passwords don't match",
+    "createAccount": "Create account",
+    "alreadyHaveAccount": "Already have an account?",
+    "noAccount": "Don't have an account?",
+    "forgotPassword": "Forgot password?",
+    "welcomeBack": "Welcome back!",
+    "joinUs": "Join us!"
+  },
+  "profile": {
+    "title": "Profile",
+    "subtitle": "Manage your account information",
+    "personalInfo": "Personal Information",
+    "accountDetails": "Account Details",
+    "name": "Name",
+    "email": "Email",
+    "role": "Role",
+    "memberSince": "Member Since",
+    "edit": "Edit",
+    "save": "Save Changes",
+    "saving": "Saving...",
+    "cancel": "Cancel",
+    "emailCannotChange": "Email cannot be changed",
+    "profileUpdated": "Profile updated successfully!",
+    "updateError": "Error updating profile",
+    "user": "User",
+    "admin": "Administrator",
+    "moderator": "Moderator"
+  },
+  "settings": {
+    "title": "Settings",
+    "subtitle": "Customize your experience",
+    "appearance": "Appearance",
+    "languageAndNotifications": "Language & Notifications",
+    "security": "Security",
+    "theme": "Theme",
+    "fontSize": "Font Size",
+    "language": "Language",
+    "notifications": "Enable notifications",
+    "emailUpdates": "Email updates",
+    "changePassword": "Change Password",
+    "changePasswordSoon": "Change Password (Coming Soon)",
+    "passwordSecurity": "Password and security settings",
+    "saveSettings": "Save Settings",
+    "settingsSaved": "Settings saved successfully!",
+    "settingsError": "Error saving settings",
+    "themes": {
+      "light": "Light",
+      "dark": "Dark",
+      "auto": "Auto"
+    },
+    "fontSizes": {
+      "small": "Small",
+      "medium": "Medium",
+      "large": "Large"
+    },
+    "languages": {
+      "ro": "Română",
+      "en": "English"
+    }
+  },
   "common": {
     "loading": "Loading...",
     "error": "An error occurred",