feat: integrate NextAuth for authentication, refactor login and registration processes, and enhance middleware for session management

src/constants/errorCodes.ts

@@ -13,6 +13,7 @@ export const ERROR_CODES = {
     EMAIL_EXISTS: "AUTH_EMAIL_EXISTS",
     INVALID_USER_DATA: "AUTH_INVALID_USER_DATA",
     LOGOUT_ERROR: "AUTH_LOGOUT_ERROR",
+    REGISTRATION_FAILED: "AUTH_REGISTRATION_FAILED",
   },
   KOMGA: {
     MISSING_CONFIG: "KOMGA_MISSING_CONFIG",

src/constants/errorMessages.ts

@@ -19,6 +19,7 @@ export const ERROR_MESSAGES: Record<string, string> = {
   [ERROR_CODES.AUTH.EMAIL_EXISTS]: "📧 This email is already in use",
   [ERROR_CODES.AUTH.INVALID_USER_DATA]: "👤 Invalid user data",
   [ERROR_CODES.AUTH.LOGOUT_ERROR]: "🚪 Error during logout",
+  [ERROR_CODES.AUTH.REGISTRATION_FAILED]: "❌ Registration failed",
 
   // Komga
   [ERROR_CODES.KOMGA.MISSING_CONFIG]: "⚙️ Komga configuration not found",