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>

prisma/schema.prisma

@@ -12,6 +12,7 @@ model User {
   email           String    @unique
   passwordHash    String
   name            String?
+  role            String    @default("user") // "user", "admin", "moderator"
   theme           String    @default("light")
   fontSize        String    @default("medium")
   createdAt       DateTime  @default(now())
@@ -25,6 +26,8 @@ model User {
   prayerRequests  PrayerRequest[]
   readingHistory  ReadingHistory[]
   preferences     UserPreference[]
+
+  @@index([role])
 }
 
 model Session {