fix: update contextType casts to include 'profile', remove stale profileSync comments

packages/server/src/routes/users.ts

@@ -231,7 +231,7 @@ export async function userRoutes(app: FastifyInstance): Promise<void> {
         return reply.code(400).send({ error: 'Avatar URL must be a relative upload path or http/https URL', statusCode: 400 });
       }
       updateData.avatar = avatar;
-      // Normalize to bare filename — profileSync historically stored /api/uploads/ prefix
+      // Normalize to bare filename — callers may include /api/uploads/ prefix
       if (typeof updateData.avatar === 'string' && updateData.avatar.startsWith('/api/uploads/')) {
         updateData.avatar = updateData.avatar.slice('/api/uploads/'.length);
       }
@@ -243,7 +243,7 @@ export async function userRoutes(app: FastifyInstance): Promise<void> {
       }
       if (banner && typeof banner === 'string' && banner.trim().length > 0) {
         updateData.banner = banner.trim();
-        // Normalize to bare filename — profileSync historically stored /api/uploads/ prefix
+        // Normalize to bare filename — callers may include /api/uploads/ prefix
         if (updateData.banner.startsWith('/api/uploads/')) {
           updateData.banner = updateData.banner.slice('/api/uploads/'.length);
         }