fix: 前端 HIGH/MEDIUM — timer 清理 + 历史持久化 + Error Boundary + console 移除

gui/src-frontend/src/store/qrContext.tsx

@@ -1,5 +1,6 @@
-import React, { createContext, useContext, useReducer, type ReactNode } from 'react';
-import type { QrState, QrAction } from '../types';
+import React, { createContext, useContext, useReducer, useEffect, type ReactNode } from 'react';
+import { Store } from '@tauri-apps/plugin-store';
+import type { QrState, QrAction, HistoryEntry } from '../types';
 
 const initialState: QrState = {
   mode: 'text',
@@ -42,6 +43,18 @@ const QrContext = createContext<{
 
 export function QrProvider({ children }: { children: ReactNode }) {
   const [state, dispatch] = useReducer(qrReducer, initialState);
+
+  // 启动时从 store 加载持久化的历史记录
+  useEffect(() => {
+    (async () => {
+      try {
+        const store = await Store.load('history.json');
+        const history = await store.get<HistoryEntry[]>('qr-history') || [];
+        dispatch({ type: 'SET_HISTORY', payload: history });
+      } catch { /* store 不可用时忽略 */ }
+    })();
+  }, []);
+
   return <QrContext.Provider value={{ state, dispatch }}>{children}</QrContext.Provider>;
 }