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

src/lib/middleware-auth.ts

@@ -0,0 +1,26 @@
+import { NextRequest } from "next/server";
+import { getToken } from "next-auth/jwt";
+
+export async function getAuthSession(request: NextRequest) {
+  try {
+    const token = await getToken({ 
+      req: request,
+      secret: process.env.NEXTAUTH_SECRET 
+    });
+    
+    if (!token) {
+      return null;
+    }
+
+    return {
+      user: {
+        id: token.sub!,
+        email: token.email!,
+        roles: JSON.parse(token.roles as string),
+      }
+    };
+  } catch (error) {
+    console.error("Auth error in middleware:", error);
+    return null;
+  }
+}