fix(auth): redirect to splash after logout

src/stores/auth/auth-events.ts

@@ -13,6 +13,7 @@ export type AuthEvent =
   | { type: "AuthModeChanged"; mode: AuthMode }
   | { type: "AuthFormCleared" }
   | { type: "AuthReset" }
+  | { type: "AuthLogoutSubmitted" }
   /** App 启动时一次性派发 —— 读 storage 把 loginStatus 同步到状态机 */
   | { type: "AuthInit" }
   /** 显式游客登录 —— splash 上点"游客模式"按钮触发（不自动） */