refactor(auth): remove unused machine state

src/stores/auth/auth-state.ts

@@ -1,17 +1,11 @@
 /**
  * Auth 状态机：State 形状 + 初始值
  */
-import type { AuthMode, AuthPanelMode, LoginStatus } from "@/data/dto/auth";
+import type { AuthPanelMode, LoginStatus } from "@/data/dto/auth";
 
 export interface AuthState {
   /** 当前面板模式（Facebook / Email） */
   authPanelMode: AuthPanelMode;
-  /** 内部登录模式（login / register） */
-  authMode: AuthMode;
-  email: string;
-  password: string;
-  username: string;
-  confirmPassword: string;
   errorMessage: string | null;
   /** 当前登录状态（未登录 / 游客 / OAuth / 邮箱）—— 下游同步器监听此字段的双向变化 */
   loginStatus: LoginStatus;
@@ -21,11 +15,6 @@ export interface AuthState {
 
 export const initialState: AuthState = {
   authPanelMode: "facebook",
-  authMode: "login",
-  email: "",
-  password: "",
-  username: "",
-  confirmPassword: "",
   errorMessage: null,
   loginStatus: "notLoggedIn",
   hasInitialized: false,