diff --git a/src/stores/ui-store.ts b/src/stores/ui-store.ts
index 62ea637..17a8f31 100644
--- a/src/stores/ui-store.ts
+++ b/src/stores/ui-store.ts
@@ -72,7 +72,7 @@ export const useUIStore = create<UIState>((set) => ({
   setOnboardingCompleted: (completed) => set({ onboardingCompleted: completed }),
 
   // v0.3.0: 面板控制
-  setDetailTab: (tab) => set({ detailTab }),
+  setDetailTab: (tab) => set({ detailTab: tab }),
   // 退出专注模式时恢复快照（若用户在专注模式下手动切换面板，视为退出专注模式）
   // v0.3.0 修复: 退出专注模式时同时恢复另一个面板的快照，与 toggleFocusMode 关闭逻辑一致
   toggleSidebar: () => set((s) => s.focusMode