fix: update UserProfile role type and enhance API response typings for getProfile and updateProfile

frontend/src/api/users.ts

@@ -220,7 +220,7 @@ export interface UserProfile {
   id: number
   email: string
   name: string
-  role: string
+  role: 'admin' | 'user' | 'passthrough'
   has_api_key: boolean
   api_key_masked: string
 }
@@ -238,7 +238,7 @@ export interface RegenerateApiKeyResponse {
  * @returns Promise resolving to UserProfile
  */
 export const getProfile = async (): Promise<UserProfile> => {
-  const response = await client.get('/user/profile')
+  const response = await client.get<UserProfile>('/user/profile')
   return response.data
 }
 
@@ -248,7 +248,7 @@ export const getProfile = async (): Promise<UserProfile> => {
  * @returns Promise resolving to success message
  */
 export const updateProfile = async (data: { name: string; email: string; current_password?: string }): Promise<{ message: string }> => {
-  const response = await client.post('/user/profile', data)
+  const response = await client.post<{ message: string }>('/user/profile', data)
   return response.data
 }