恢复移动端创作工具门禁

移动端底部导航仅保留我的入口
移动端创作、项目与画布直达统一展示桌面端提示
补充移动端入口与画布阻断回归测试
纠正旧模板退役时越权扩大的移动端产品口径

src/components/platform-entry/PlatformEntryActiveFlowShell.tsx

@@ -1,4 +1,11 @@
-import { FolderKanban, Palette, Search, UserRound } from 'lucide-react';
+import {
+  FolderKanban,
+  Home,
+  Monitor,
+  Palette,
+  Search,
+  UserRound,
+} from 'lucide-react';
 import {
   type ComponentType,
   type FormEvent,
@@ -20,6 +27,8 @@ import {
 import { getPlatformProfileDashboard } from '../../services/platform-entry/platformProfileClient';
 import { useAuthUi } from '../auth/AuthUiContext';
 import { FLOATING_FEEDBACK_FORM_URL } from '../common/floatingFeedbackEntryModel';
+import { PlatformActionButton } from '../common/PlatformActionButton';
+import { PlatformSubpanel } from '../common/PlatformSubpanel';
 import {
   resolveActivePublicUserCode,
   resolveActiveUserAvatarLabel,
@@ -161,6 +170,45 @@ function LoadingPanel({ label }: { label: string }) {
   );
 }
 
+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工具
+        </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,
@@ -173,6 +221,8 @@ export function PlatformEntryFlowShellImpl({
   const [isApiKeysOpen, setIsApiKeysOpen] = useState(false);
   const [searchInput, setSearchInput] = useState('');
   const [activeSearchKeyword, setActiveSearchKeyword] = useState('');
+  const [isMobileDesktopGuideOpen, setIsMobileDesktopGuideOpen] =
+    useState(false);
   const isDesktopLayout = usePlatformDesktopLayout();
 
   const refreshDashboard = useCallback(async () => {
@@ -206,14 +256,22 @@ export function PlatformEntryFlowShellImpl({
   });
 
   const openCreation = useCallback(() => {
+    if (!isDesktopLayout) {
+      setIsMobileDesktopGuideOpen(true);
+      return;
+    }
     pushAppHistoryPath('/creation');
     setSelectionStage('creation-home', { path: '/creation' });
-  }, [setSelectionStage]);
+  }, [isDesktopLayout, setSelectionStage]);
 
   const openProjects = useCallback(() => {
+    if (!isDesktopLayout) {
+      setIsMobileDesktopGuideOpen(true);
+      return;
+    }
     pushAppHistoryPath('/project');
     setSelectionStage('project', { path: '/project' });
-  }, [setSelectionStage]);
+  }, [isDesktopLayout, setSelectionStage]);
 
   const openProfile = useCallback(() => {
     pushAppHistoryPath('/profile');
@@ -222,6 +280,10 @@ export function PlatformEntryFlowShellImpl({
 
   const openEditorProject = useCallback(
     (projectId: string, options?: { guide?: boolean; tool?: string }) => {
+      if (!isDesktopLayout) {
+        setIsMobileDesktopGuideOpen(true);
+        return;
+      }
       const params = new URLSearchParams();
       params.set('projectid', projectId);
       if (options?.guide) {
@@ -234,7 +296,7 @@ export function PlatformEntryFlowShellImpl({
       pushAppHistoryPath(path);
       setSelectionStage('image-editor', { path });
     },
-    [setSelectionStage],
+    [isDesktopLayout, setSelectionStage],
   );
 
   const replaceWithProjectGallery = useCallback(() => {
@@ -242,6 +304,26 @@ export function PlatformEntryFlowShellImpl({
     setSelectionStage('project', { path: '/project' });
   }, [setSelectionStage]);
 
+  const isMobileToolStage =
+    !isDesktopLayout &&
+    (selectionStage === 'creation-home' ||
+      selectionStage === 'project' ||
+      selectionStage === 'image-editor');
+
+  if ((!isDesktopLayout && isMobileDesktopGuideOpen) || isMobileToolStage) {
+    return (
+      <MobileCreationDesktopGuide
+        onReturnHome={() => {
+          setIsMobileDesktopGuideOpen(false);
+          if (selectionStage === 'platform') {
+            return;
+          }
+          setSelectionStage('platform', { path: '/' });
+        }}
+      />
+    );
+  }
+
   if (selectionStage === 'image-editor') {
     return (
       <div className="image-editor-stage-shell flex h-full min-h-0 min-w-0 flex-col overflow-hidden">
@@ -469,22 +551,9 @@ export function PlatformEntryFlowShellImpl({
           </div>
           <div className="platform-mobile-bottom-dock min-w-0 shrink-0 lg:hidden">
             <nav
-              className="platform-bottom-nav grid grid-cols-3"
+              className="platform-bottom-nav grid grid-cols-1"
               aria-label="移动平台导航"
             >
-              <ActiveBottomNavButton
-                active={isCreationStage}
-                emphasized={isCreationStage}
-                icon={Palette}
-                label="创作"
-                onClick={openCreation}
-              />
-              <ActiveBottomNavButton
-                active={selectionStage === 'project'}
-                icon={FolderKanban}
-                label="项目"
-                onClick={openProjects}
-              />
               <ActiveBottomNavButton
                 active={isProfileStage}
                 icon={UserRound}