feat: add complex user invitation and management features

- Implemented complex member and invitation schemas using Zod for validation.
- Created new API endpoints for inviting, accepting, revoking, and canceling complex user invitations.
- Developed handlers for managing complex users, including listing, inviting, revoking, and canceling invitations.
- Added frontend components for displaying and managing complex users and invitations.
- Introduced session storage management for pending invitations.
- Integrated Gravatar for user avatars based on email.
- Created database migration for complex invitations table.

apps/backend/src/modules/user/services/user.service.ts

@@ -1,14 +1,24 @@
-import { createHash } from 'node:crypto';
 import type { User } from '@/lib/auth';
+import { resolveAvatarUrl } from '@/lib/avatar';
 import { db } from '@/lib/prisma';
 import type { UserProfile } from '@repo/api-contract';
 
-function getGravatarUrl(email: string): string {
-  const hash = createHash('md5').update(email.trim().toLowerCase()).digest('hex');
-  return `https://www.gravatar.com/avatar/${hash}?d=identicon`;
-}
-
 export async function getUserProfile(user: User, complexId?: string): Promise<UserProfile> {
+  const dbUser = await db.user.findUnique({
+    where: { id: user.id },
+    select: {
+      id: true,
+      name: true,
+      email: true,
+      image: true,
+      createdAt: true,
+    },
+  });
+
+  if (!dbUser) {
+    throw new Error('User not found.');
+  }
+
   let role = 'member';
 
   if (complexId) {
@@ -27,11 +37,14 @@ export async function getUserProfile(user: User, complexId?: string): Promise<Us
   }
 
   return {
-    id: user.id,
-    fullName: user.name,
-    email: user.email,
+    id: dbUser.id,
+    fullName: dbUser.name,
+    email: dbUser.email,
     role,
-    avatarUrl: user.image || getGravatarUrl(user.email),
-    createdAt: user.createdAt.toISOString(),
+    avatarUrl: resolveAvatarUrl({
+      email: dbUser.email,
+      image: dbUser.image,
+    }),
+    createdAt: dbUser.createdAt.toISOString(),
   };
 }