修复历史面板渲染报错：补充 setup() return 中缺失的三个属性

historyQuickFilters、handleHistoryPickerVisibleChange、handleHistoryDateChange
在模板中使用但未从 setup() 返回，导致 Vue 报 "accessed during render but is not
defined on instance" 警告，历史面板功能异常。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/views/ChatView.vue

@@ -2407,6 +2407,9 @@ export default {
       toggleImmersiveMode,
       toggleHistoryPanel,
       handleHistoryPetChange,
+      handleHistoryDateChange,
+      handleHistoryPickerVisibleChange,
+      historyQuickFilters,
       loadChatHistory,
       loadHistoryConversation,
       formatMessage,