feat(app): APP 不再接入默认路径 /, 直接进登录或内部页面

- 新增 RootGate: Tauri 环境下访问 / 时, 未登录重定向 /login,
  已登录重定向 /home; web 浏览器仍走 Landing 作为网络入口
- 同步读取 localStorage 已保存会话, 避免已登录用户闪一下登录页
- ota.ts 导出 inTauri 检测, App.tsx 复用

src/App.tsx

@@ -1,7 +1,7 @@
 import React, { useEffect } from "react";
 import { BrowserRouter, Routes, Route, Navigate, useNavigate } from "react-router-dom";
 import { useAppStore } from "./stores/app";
-import { initOta } from "./api/ota";
+import { initOta, inTauri } from "./api/ota";
 import Login from "./pages/Login";
 import Landing from "./pages/Landing";
 import Home from "./pages/Home";
@@ -19,6 +19,29 @@ function ProtectedRoute({ children }: { children: React.ReactNode }) {
   return <>{children}</>;
 }
 
+// 同步读取已保存的会话 (避免首帧闪烁: RouterGate 的 effect 是异步的)
+function getStoredUser(): unknown {
+  try {
+    const saved = localStorage.getItem("wardrobe_user");
+    if (!saved) return null;
+    const p = JSON.parse(saved);
+    return p?.user ?? null;
+  } catch {
+    return null;
+  }
+}
+
+// 默认路径 /: web 是网络入口(落地页); APP (Tauri) 不进 Landing,
+// 未登录直接去 /login, 已登录直接进内部页面 /home
+function RootGate() {
+  const user = useAppStore((s) => s.user);
+  if (inTauri) {
+    const effective = user ?? getStoredUser();
+    return <Navigate to={effective ? "/home" : "/login"} replace />;
+  }
+  return <Landing />;
+}
+
 function RouterGate() {
   const user = useAppStore((s) => s.user);
   const navigate = useNavigate();
@@ -41,7 +64,7 @@ function RouterGate() {
 
   return (
     <Routes>
-      <Route path="/" element={<Landing />} />
+      <Route path="/" element={<RootGate />} />
       <Route path="/login" element={<Login />} />
       <Route element={<ProtectedRoute><Layout /></ProtectedRoute>}>
         <Route path="/home" element={<Home />} />

src/api/ota.ts

@@ -8,7 +8,7 @@
 import { APP_VERSION, BUILD_ID } from "../version";
 
 // 判断是否在 Tauri WebView 内 (有 __TAURI_INTERNALS__ 即 Tauri 环境)
-const inTauri = typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
+export const inTauri = typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
 
 // 拼接绝对 URL: web 模式同源 (OTA 服务端同时托管 dist), Tauri 不走这里
 function resolveUrl(p: string) {