feat(frontend): Refactor to cookie-based auth and add /api/v1 prefix

frontend/src/services/auth.ts

@@ -1,6 +1,4 @@
-import axios from "axios"
-
-const API_URL = import.meta.env.VITE_API_URL || ""
+import api from "./api"
 
 export interface AuthResponse {
   access_token: string
@@ -10,38 +8,40 @@ export interface AuthResponse {
 export interface UserResponse {
   id: string
   email: string
+  display_name?: string
 }
 
 export const AuthService = {
   async login(email: string, password: string): Promise<AuthResponse> {
     const formData = new FormData()
-    formData.append("username", email) // OAuth2PasswordRequestForm uses 'username'
+    formData.append("username", email)
     formData.append("password", password)
 
-    const response = await axios.post<AuthResponse>(`${API_URL}/auth/login`, formData)
-    if (response.data.access_token) {
-      localStorage.setItem("token", response.data.access_token)
-    }
+    const response = await api.post<AuthResponse>("/auth/login", formData)
     return response.data
   },
 
+  async loginWithOIDC() {
+    const response = await api.get<{ url: string }>("/auth/oidc/login")
+    if (response.data.url) {
+      window.location.href = response.data.url
+    }
+  },
+
   async register(email: string, password: string): Promise<UserResponse> {
-    const response = await axios.post<UserResponse>(`${API_URL}/auth/register`, {
+    const response = await api.post<UserResponse>("/auth/register", {
       email,
       password,
     })
     return response.data
   },
 
-  logout() {
-    localStorage.removeItem("token")
+  async getMe(): Promise<UserResponse> {
+    const response = await api.get<UserResponse>("/auth/me")
+    return response.data
   },
 
-  getToken() {
-    return localStorage.getItem("token")
-  },
-
-  isAuthenticated() {
-    return !!this.getToken()
+  async logout() {
+    await api.post("/auth/logout")
   },
 }