refactor: migrate authentication from Supabase to Better Auth and update Prisma schema models

apps/frontend/src/lib/api-client.ts

@@ -29,11 +29,16 @@ import type {
   UserProfileResponse,
 } from '@repo/api-contract';
 import axios, { AxiosError } from 'axios';
+import { createAuthClient } from "better-auth/react";
 
 const apiBaseUrl =
   import.meta.env.VITE_API_BASE_URL?.trim() ||
   (import.meta.env.DEV ? 'http://localhost:3000' : window.location.origin);
-let accessToken: string | null = null;
+
+export const authClient = createAuthClient({
+  baseURL: apiBaseUrl,
+});
+
 
 export class ApiClientError extends Error {
   status?: number;
@@ -104,14 +109,6 @@ function normalizeError(error: unknown): ApiClientError {
   });
 }
 
-http.interceptors.request.use((config) => {
-  if (!accessToken) return config;
-
-  config.headers = config.headers ?? {};
-  config.headers.Authorization = `Bearer ${accessToken}`;
-  return config;
-});
-
 http.interceptors.response.use(
   (response) => response,
   async (error: AxiosError) => {
@@ -289,5 +286,5 @@ export function configureApiClient(nextHandlers: ErrorHandlers) {
 }
 
 export function setApiAccessToken(token: string | null) {
-  accessToken = token;
+  // accessToken = token;
 }