feat: 添加日历批量操作与客户端时区感知功能，优化前端 UI 交互体验

apps/lib/features/home/ui/screens/home_screen.dart

@@ -41,7 +41,9 @@ const _transcribingStrokeWidth = 2.0;
 const _attachmentPreviewSize = 88.0;
 const _attachmentPreviewRadius = 10.0;
 const _attachmentPreviewGap = 8.0;
-const _bottomStackReservedHeight = 140.0;
+const _bottomStackReservedHeight = 116.0;
+const _toolResultWidthFactor = 0.9;
+const _pullRefreshMinVisibleMs = 450;
 
 const homeConversationStageKey = ValueKey('home_conversation_stage');
 const homeBottomInputStackKey = ValueKey('home_bottom_input_stack');
@@ -92,7 +94,7 @@ class _HomeScreenState extends State<HomeScreen>
   late final Future<void> Function(String transcript) _autoSendTranscript;
   late final AnimationController _listeningAnimationController;
   bool _isRecording = false;
-  bool _isHoldToSpeakMode = false;
+  bool _isHoldToSpeakMode = true;
   bool _isTranscribing = false;
   bool _isCancelGestureActive = false;
   bool _isSendingMessage = false;
@@ -356,12 +358,29 @@ class _HomeScreenState extends State<HomeScreen>
     if (_isPullRefreshing) {
       return;
     }
+    final chatBloc = context.read<ChatBloc>();
+    if (chatBloc.state.isLoadingHistory) {
+      return;
+    }
+    final hasEarlierHistory = chatBloc.state.hasEarlierHistory;
     if (mounted) {
       setState(() => _isPullRefreshing = true);
     }
+    final startedAt = DateTime.now();
     try {
-      await context.read<ChatBloc>().loadMoreHistory();
+      if (hasEarlierHistory) {
+        await chatBloc.loadMoreHistory();
+      } else {
+        Toast.show(context, '没有更早的历史记录了', type: ToastType.info);
+      }
     } finally {
+      final elapsed = DateTime.now().difference(startedAt);
+      final minDuration = const Duration(
+        milliseconds: _pullRefreshMinVisibleMs,
+      );
+      if (elapsed < minDuration) {
+        await Future.delayed(minDuration - elapsed);
+      }
       if (mounted) {
         setState(() => _isPullRefreshing = false);
       }
@@ -585,7 +604,32 @@ class _HomeScreenState extends State<HomeScreen>
   }
 
   Widget _buildToolResultItem(ToolResultItem item) {
-    return UiSchemaRenderer.renderSchema(item.uiSchema);
+    final rootNode = item.uiSchema['root'];
+    final appearance = rootNode is Map<String, dynamic>
+        ? rootNode['appearance'] as String?
+        : null;
+    final needsOuterCard = appearance == null || appearance == 'plain';
+    final schemaContent = UiSchemaRenderer.renderSchema(item.uiSchema);
+    final wrappedContent = needsOuterCard
+        ? Container(
+            width: double.infinity,
+            padding: const EdgeInsets.all(AppSpacing.md),
+            decoration: BoxDecoration(
+              color: AppColors.white,
+              borderRadius: BorderRadius.circular(AppRadius.lg),
+              border: Border.all(color: AppColors.homeConversationBorder),
+            ),
+            child: schemaContent,
+          )
+        : schemaContent;
+
+    return Align(
+      alignment: Alignment.centerLeft,
+      child: FractionallySizedBox(
+        widthFactor: _toolResultWidthFactor,
+        child: wrappedContent,
+      ),
+    );
   }
 
   Widget _buildBottomInputStack(BuildContext context, ChatState state) {
@@ -733,8 +777,7 @@ class _HomeScreenState extends State<HomeScreen>
   }
 
   void _onHoldToSpeakStart() {
-    HapticFeedback.heavyImpact();
-    HapticFeedback.vibrate();
+    HapticFeedback.selectionClick();
     setState(() {
       _isCancelGestureActive = false;
     });
@@ -747,7 +790,7 @@ class _HomeScreenState extends State<HomeScreen>
       _cancelRecording(showToast: false);
       return;
     }
-    HapticFeedback.mediumImpact();
+    HapticFeedback.selectionClick();
     _stopRecording(autoSendAfterTranscribe: true);
   }