diff --git a/lib/hooks/useMediaQuery.ts b/lib/hooks/useMediaQuery.ts
index b29157b..665c47c 100644
--- a/lib/hooks/useMediaQuery.ts
+++ b/lib/hooks/useMediaQuery.ts
@@ -2,6 +2,9 @@
  * useMediaQuery Hook
  * 媒体查询 Hook - 监听浏览器媒体查询状态变化
  * 
+ * Note: Ready-to-use utility hook for responsive features.
+ * Currently not in active use but available for future enhancements.
+ * 
  * 遵循 Liquid Glass 设计系统原则：
  * - 响应式设计优先
  * - 性能优化（使用 matchMedia API）
diff --git a/lib/store/history-store.ts b/lib/store/history-store.ts
index 7857868..f0f1bff 100644
--- a/lib/store/history-store.ts
+++ b/lib/store/history-store.ts
@@ -25,16 +25,6 @@ interface HistoryStore {
     episodes?: Episode[]
   ) => void;
   
-  updateProgress: (
-    videoId: string | number,
-    source: string,
-    episodeIndex: number,
-    position: number,
-    duration: number
-  ) => void;
-  
-  getHistory: () => VideoHistoryItem[];
-  getHistoryItem: (videoId: string | number, source: string) => VideoHistoryItem | undefined;
   removeFromHistory: (videoId: string | number, source: string) => void;
   clearHistory: () => void;
 }
@@ -121,35 +111,6 @@ export const useHistoryStore = create<HistoryStore>()(
         });
       },
 
-      updateProgress: (videoId, source, episodeIndex, position, duration) => {
-        set((state) => {
-          const newHistory = state.viewingHistory.map((item) => {
-            if (item.videoId === videoId && item.source === source) {
-              return {
-                ...item,
-                episodeIndex,
-                playbackPosition: position,
-                duration,
-                timestamp: Date.now(),
-              };
-            }
-            return item;
-          });
-
-          return { viewingHistory: newHistory };
-        });
-      },
-
-      getHistory: () => {
-        return get().viewingHistory;
-      },
-
-      getHistoryItem: (videoId, source) => {
-        return get().viewingHistory.find(
-          (item) => item.videoId === videoId && item.source === source
-        );
-      },
-
       removeFromHistory: (videoId, source) => {
         set((state) => ({
           viewingHistory: state.viewingHistory.filter(