fix: add logged-out login entry

docs/design/PLATFORM_HOME_PUBLIC_BROWSE_AND_LOGIN_MODAL_GATING_DESIGN_2026-04-19.md

@@ -150,6 +150,8 @@
 - 不再提供 `AuthGate` 层右上角固定悬浮的全局登录 / 账号信息入口
 - 登录触发统一来自页面内受保护动作、个人页、存档页等明确入口
 - 账号信息面板只通过页面内按钮打开，不在平台右上角常驻悬浮
+- 未登录移动端底部导航不展示“我的”时，平台页头必须保留一个直接可点的 `登录` 入口，避免用户只能通过受保护动作被动触发弹窗
+- 桌面端平台页头的账号胶囊在未登录时主文案必须直接显示 `登录`，不能只显示“进入账户”这类弱入口
 
 ## 4.2 平台首页数据加载
 
@@ -222,3 +224,4 @@
 3. 未登录选择 RPG 创作类型时，直接弹出登录弹窗，登录后自动进入创作工作台。
 4. 登录弹窗内没有介绍性大段文字，只剩必要输入与按钮。
 5. 未登录态首页不会因个人接口失败而出现“读取个人看板失败”“读取作品库失败”之类报错。
+6. 未登录移动端首页页头存在明确 `登录` 入口，点击后打开同一个登录弹窗。

src/components/rpg-entry/RpgEntryHomeView.recharge.test.tsx

@@ -157,6 +157,55 @@ function renderProfileView(onRechargeSuccess = vi.fn()) {
   );
 }
 
+function renderLoggedOutHomeView(openLoginModal = vi.fn()) {
+  return render(
+    <AuthUiContext.Provider
+      value={{
+        user: null,
+        canAccessProtectedData: false,
+        openLoginModal,
+        requireAuth: vi.fn(),
+        openSettingsModal: vi.fn(),
+        openAccountModal: vi.fn(),
+        logout: vi.fn(async () => undefined),
+        musicVolume: 0.42,
+        setMusicVolume: vi.fn(),
+        platformTheme: 'light',
+        setPlatformTheme: vi.fn(),
+        isHydratingSettings: false,
+        isPersistingSettings: false,
+        settingsError: null,
+      }}
+    >
+      <RpgEntryHomeView
+        activeTab="home"
+        onTabChange={vi.fn()}
+        hasSavedGame={false}
+        savedSnapshot={null}
+        saveEntries={[]}
+        saveError={null}
+        featuredEntries={[]}
+        latestEntries={[]}
+        myEntries={[]}
+        historyEntries={[]}
+        profileDashboard={null}
+        isLoadingPlatform={false}
+        isLoadingDashboard={false}
+        isResumingSaveWorldKey={null}
+        platformError={null}
+        dashboardError={null}
+        onContinueGame={vi.fn()}
+        onResumeSave={vi.fn()}
+        onOpenCreateWorld={vi.fn()}
+        onOpenCreateTypePicker={vi.fn()}
+        onOpenGalleryDetail={vi.fn()}
+        onOpenLibraryDetail={vi.fn()}
+        onSearchPublicCode={vi.fn()}
+      />
+    </AuthUiContext.Provider>,
+  );
+}
+
 afterEach(() => {
   vi.clearAllMocks();
 });
@@ -175,3 +224,13 @@ test('opens recharge modal and submits points product', async () => {
 
   await waitFor(() => expect(onRechargeSuccess).toHaveBeenCalledTimes(1));
 });
+
+test('shows a reachable login entry in logged out mobile shell', async () => {
+  const user = userEvent.setup();
+  const openLoginModal = vi.fn();
+
+  renderLoggedOutHomeView(openLoginModal);
+  await user.click(screen.getByRole('button', { name: '登录' }));
+
+  expect(openLoginModal).toHaveBeenCalledTimes(1);
+});

src/components/rpg-entry/RpgEntryHomeView.tsx

@@ -10,6 +10,7 @@ import {
   Copy,
   Crown,
   House,
+  LogIn,
   MessageCircle,
   Pencil,
   Search,
@@ -1896,8 +1897,18 @@ export function RpgEntryHomeView({
   if (!isDesktopLayout) {
     return (
       <div className="platform-mobile-entry-shell flex h-full min-h-0 min-w-0 flex-col overflow-hidden">
-        <div className="mb-3 shrink-0 px-0.5">
+        <div className="mb-3 flex shrink-0 items-center justify-between gap-3 px-0.5">
           <RpgEntryBrandLogo />
+          {!isAuthenticated ? (
+            <button
+              type="button"
+              onClick={openUserSurface}
+              className="platform-button platform-button--primary shrink-0 px-3 py-2 text-xs"
+            >
+              <LogIn className="h-3.5 w-3.5" />
+              登录
+            </button>
+          ) : null}
         </div>
 
         <div className="platform-tab-panel-stack min-w-0 flex-1">
@@ -1912,7 +1923,7 @@ export function RpgEntryHomeView({
           }}
         >
           <div
-            className={`platform-bottom-nav grid ${visibleTabs.length === 5 ? 'grid-cols-5' : visibleTabs.length === 4 ? 'grid-cols-4' : 'grid-cols-2'}`}
+            className={`platform-bottom-nav grid ${visibleTabs.length === 5 ? 'grid-cols-5' : visibleTabs.length === 4 ? 'grid-cols-4' : visibleTabs.length === 3 ? 'grid-cols-3' : 'grid-cols-2'}`}
           >
             {visibleTabs.map((tab) => (
               <PlatformTabButton
@@ -2005,10 +2016,10 @@ export function RpgEntryHomeView({
                 </span>
                 <span className="min-w-0">
                   <span className="block truncate text-sm font-semibold text-[var(--platform-text-strong)]">
-                    {authUi?.user?.displayName || '进入账户'}
+                    {authUi?.user?.displayName || '登录'}
                   </span>
                   <span className="block truncate text-xs text-[var(--platform-text-soft)]">
-                    {authUi?.user ? publicUserCode : '登录后同步作品与进度'}
+                    {authUi?.user ? publicUserCode : '账号入口'}
                   </span>
                 </span>
               </button>