refactor(auth): migrate social login to next-auth

src/stores/auth/auth-machine.ts

@@ -3,11 +3,8 @@
  *
  * 原始 Dart: lib/ui/auth/bloc/auth_bloc.dart + auth_state.dart + auth_event.dart
  *
- * 设计要点：
- *   - 使用 XState v5 `setup({...}).createMachine({...})` 声明式 API
- *   - 异步副作用用 `fromPromise` actor 包装（自动取消、错误捕获）
- *   - 表单字段值放在 `context`，UI 通过事件更新
- *   - 保持事件类型名与原 Dart 一致，便于业务层迁移对照
+ * 本轮迁移：社交登录改由 NextAuth 处理（`@/lib/auth/nextauth`），状态机仅保留
+ * 邮箱注册/登录 + 通用 reset 事件。社交登录直接 `await nextauth.googleLogin()` 即可。
  */
 import { setup, fromPromise, assign } from "xstate";
 
@@ -16,10 +13,6 @@ import type { AuthPanelMode } from "@/models/auth/auth-panel-mode";
 import type { LoginType } from "@/models/auth/login-type";
 import { authRepository } from "@/data/repositories/auth_repository";
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
-import {
-  loginWithFacebook,
-  getFacebookUserData,
-} from "@/integrations/facebook-sdk";
 import { Result } from "@/utils/result";
 
 // ============================================================
@@ -67,18 +60,14 @@ export type AuthEvent =
       username: string;
       confirmPassword: string;
     }
+  // 社交登录（已迁移到 NextAuth）— 业务层直接 await nextauth.googleLogin() 即可
   | { type: "AuthGoogleLoginSubmitted" }
   | { type: "AuthFacebookLoginSubmitted" }
-  | { type: "AuthAppleLoginSubmitted" }
-  | { type: "AuthWebGoogleLoginSuccess"; idToken: string; email: string };
+  | { type: "AuthAppleLoginSubmitted" };
 
 // ============================================================
 // Helpers
 // ============================================================
-/**
- * 从存储读取 guestId，失败或缺失返回 undefined
- * 用 if 语句避免 TS 联合类型 narrowing 问题
- */
 async function readGuestId(): Promise<string | undefined> {
   const r = await AuthStorage.getInstance().getDeviceId();
   if (r.success && r.data != null) {
@@ -118,37 +107,6 @@ const emailRegisterThenLoginActor = fromPromise<
   return "email" as LoginType;
 });
 
-const googleLoginActor = fromPromise<LoginType, { idToken: string }>(async ({ input }) => {
-  const guestId = await readGuestId();
-  const result = await authRepository.googleLogin({ idToken: input.idToken, guestId });
-  if (Result.isErr(result)) throw result.error;
-  return "google" as LoginType;
-});
-
-const facebookLoginActor = fromPromise<LoginType, Record<string, never>>(
-  async () => {
-    const guestId = await readGuestId();
-
-    const fbResult = await loginWithFacebook();
-    if (Result.isErr(fbResult)) throw fbResult.error;
-
-    const authResult = await authRepository.facebookLogin({
-      accessToken: fbResult.data.accessToken,
-      guestId,
-    });
-    if (Result.isErr(authResult)) throw authResult.error;
-
-    // best-effort：异步上传 Facebook 头像
-    void (async () => {
-      const userData = await getFacebookUserData();
-      if (Result.isOk(userData) && userData.data.pictureUrl) {
-        // TODO: 调用 userStorage.setAvatarUrl
-      }
-    })();
-    return "facebook" as LoginType;
-  },
-);
-
 // ============================================================
 // Machine
 // ============================================================
@@ -160,8 +118,6 @@ export const authMachine = setup({
   actors: {
     emailLogin: emailLoginActor,
     emailRegisterThenLogin: emailRegisterThenLoginActor,
-    googleLogin: googleLoginActor,
-    facebookLogin: facebookLoginActor,
   },
 }).createMachine({
   id: "auth",
@@ -196,18 +152,15 @@ export const authMachine = setup({
         },
         AuthEmailLoginSubmitted: "loadingEmailLogin",
         AuthEmailRegisterSubmitted: "loadingEmailRegister",
-        AuthGoogleLoginSubmitted: {
-          actions: assign({
-            errorMessage: "Use the Google button to sign in on web",
-          }),
-        },
-        AuthFacebookLoginSubmitted: "loadingFacebookLogin",
+        // 社交登录已迁移到 NextAuth，业务层直接 await nextauth.googleLogin() / nextauth.facebookLogin()
+        // 状态机保留事件以兼容旧调用方（实际不再触发）
+        AuthGoogleLoginSubmitted: {},
+        AuthFacebookLoginSubmitted: {},
         AuthAppleLoginSubmitted: {
           actions: assign({
             errorMessage: "Apple login not implemented",
           }),
         },
-        AuthWebGoogleLoginSuccess: "loadingWebGoogleLogin",
       },
     },
 
@@ -266,55 +219,8 @@ export const authMachine = setup({
       },
     },
 
-    loadingFacebookLogin: {
-      invoke: {
-        src: "facebookLogin",
-        input: () => ({}),
-        onDone: {
-          target: "success",
-          actions: assign({
-            loginType: ({ event }) => event.output,
-            errorMessage: null,
-          }),
-        },
-        onError: {
-          target: "idle",
-          actions: assign({
-            errorMessage: ({ event }) =>
-              event.error instanceof Error ? event.error.message : String(event.error),
-          }),
-        },
-      },
-    },
-
-    loadingWebGoogleLogin: {
-      invoke: {
-        src: "googleLogin",
-        input: ({ event }) => {
-          if (event.type !== "AuthWebGoogleLoginSuccess")
-            return { idToken: "" };
-          return { idToken: event.idToken };
-        },
-        onDone: {
-          target: "success",
-          actions: assign({
-            loginType: ({ event }) => event.output,
-            errorMessage: null,
-          }),
-        },
-        onError: {
-          target: "idle",
-          actions: assign({
-            errorMessage: ({ event }) =>
-              event.error instanceof Error ? event.error.message : String(event.error),
-          }),
-        },
-      },
-    },
-
     success: {
       // 终态：业务层通过 state.matches("success") 判断
-      // isSuccess 由 context 推算（loginType !== "none"）
     },
   },
 });