feature: 新增伏笔管理系统，支持可视化追踪、AI智能关联回收及章节生成时的伏笔提醒

frontend/src/App.tsx

@@ -14,6 +14,7 @@ import Organizations from './pages/Organizations';
 import Chapters from './pages/Chapters';
 import ChapterReader from './pages/ChapterReader';
 import ChapterAnalysis from './pages/ChapterAnalysis';
+import Foreshadows from './pages/Foreshadows';
 import WritingStyles from './pages/WritingStyles';
 import Settings from './pages/Settings';
 import MCPPlugins from './pages/MCPPlugins';
@@ -59,6 +60,7 @@ function App() {
             <Route path="organizations" element={<Organizations />} />
             <Route path="chapters" element={<Chapters />} />
             <Route path="chapter-analysis" element={<ChapterAnalysis />} />
+            <Route path="foreshadows" element={<Foreshadows />} />
             <Route path="writing-styles" element={<WritingStyles />} />
             <Route path="sponsor" element={<Sponsor />} />
             {/* <Route path="polish" element={<Polish />} /> */}