引导移动端创作主页使用桌面端

移动端直达 /creation 时展示桌面端打开引导

补充移动端创作主页回归测试

同步创作主页与玩法链路文档口径

src/components/platform-entry/PlatformEntryFlowShellImpl.tsx

@@ -1,4 +1,4 @@
-import { Loader2 } from 'lucide-react';
+import { Home, Loader2, Monitor } from 'lucide-react';
 
 import { AnimatePresence, motion } from 'motion/react';
 import {
@@ -1636,6 +1636,45 @@ function CreationResultRecoveryPanel({
   );
 }
 
+function MobileCreationDesktopGuide({
+  onReturnHome,
+}: {
+  onReturnHome: () => void;
+}) {
+  return (
+    <main
+      className="flex min-h-full flex-1 items-center justify-center px-4 py-8"
+      aria-label="桌面端创作提示"
+    >
+      <PlatformSubpanel
+        as="section"
+        radius="xl"
+        padding="none"
+        className="platform-remap-surface w-full max-w-sm px-5 py-6 text-center"
+      >
+        <span className="mx-auto flex h-14 w-14 items-center justify-center rounded-[1.05rem] bg-[rgba(199,101,50,0.12)] text-[var(--platform-accent-strong)]">
+          <Monitor aria-hidden="true" className="h-7 w-7" />
+        </span>
+        <h1 className="mt-4 text-xl font-black leading-tight text-[var(--platform-text-strong)]">
+          请在桌面端打开创作主页
+        </h1>
+        <p className="mt-3 text-sm font-semibold leading-6 text-[var(--platform-text-base)]">
+          图片画布、项目管理和素材库需要更大的操作空间。
+        </p>
+        <PlatformActionButton
+          onClick={onReturnHome}
+          size="md"
+          shape="pill"
+          className="mt-5 min-h-11 w-full"
+        >
+          <Home aria-hidden="true" className="h-4 w-4" />
+          返回首页
+        </PlatformActionButton>
+      </PlatformSubpanel>
+    </main>
+  );
+}
+
 export function PlatformEntryFlowShellImpl({
   selectionStage,
   setSelectionStage,
@@ -15238,7 +15277,7 @@ export function PlatformEntryFlowShellImpl({
     'works-only',
     '正在加载草稿列表...',
   );
-  const creationLandingContent = (
+  const creationLandingContent = isDesktopLayout ? (
     <Suspense fallback={<LazyPanelFallback label="正在加载创作主页..." />}>
       <CreationLandingView
         onOpenProject={openEditorProject}
@@ -15250,6 +15289,14 @@ export function PlatformEntryFlowShellImpl({
         ]}
       />
     </Suspense>
+  ) : (
+    <MobileCreationDesktopGuide
+      onReturnHome={() => {
+        pushAppHistoryPath('/');
+        platformBootstrap.setPlatformTab('home');
+        setSelectionStage('platform', { path: '/' });
+      }}
+    />
   );
   const projectGalleryContent = (
     <Suspense fallback={<LazyPanelFallback label="正在加载项目..." />}>