feat: 改进聊天弹窗和遮罩层交互，优化状态管理和绘制逻辑

lib/widgets/chat_popup.dart

@@ -26,9 +26,9 @@ class ChatPopup extends StatefulWidget {
 }
 
 class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMixin {
-  OverlayEntry? _overlayEntry;
   Offset _iconPosition = const Offset(10, 120);
   final double _iconSizeDefault = 80.0;
+  bool _isShowingPopup = false;
   late AnimationController _partScreenAnimationController;
 
   @override
@@ -42,71 +42,47 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
 
   @override
   void dispose() {
-    _removeOverlay();
     _partScreenAnimationController.dispose();
     super.dispose();
   }
 
-  void _openFullScreen() async {
-    final messageService = context.read<MessageService>();
-    _removeOverlay();
-
-    await Navigator.of(context).push(
-      MaterialPageRoute(
-        builder: (context) => ChangeNotifierProvider.value(
-          value: messageService, // 传递同一个单例实例
-          child: const FullScreenPage(),
-        ),
-      ),
-    );
-  }
-
   void _insertOverlay() {
-    if (_overlayEntry != null) return;
-    _overlayEntry = OverlayEntry(
-      builder: (context) => _buildOverlayContent(),
-    );
-    Overlay.of(context).insert(_overlayEntry!);
+    if (_isShowingPopup) return;
+    setState(() {
+      _isShowingPopup = true;
+    });
     _partScreenAnimationController.forward();
   }
 
   void _removeOverlay() {
-    if (_overlayEntry == null) return;
+    if (!_isShowingPopup) return;
     _partScreenAnimationController.reverse().then((_) {
-      _overlayEntry?.remove();
-      _overlayEntry = null;
+      if (mounted) {
+        setState(() {
+          _isShowingPopup = false;
+        });
+      }
     });
   }
 
-  Widget _buildOverlayContent() {
+  @override
+  Widget build(BuildContext context) {
     return ChangeNotifierProvider.value(
       value: MessageService.instance,
-      child: Material(
-        color: Colors.transparent,
-        child: LayoutBuilder(
-          builder: (context, constraints) {
-            final position = _calculatePosition(constraints);
-            final double minHeight = constraints.maxHeight * 0.16;
-            final double maxHeight = constraints.maxHeight * 0.4;
-            final double chatWidth = constraints.maxWidth * 0.94;
-            return Stack(
-              children: [
+      child: LayoutBuilder(
+        builder: (context, constraints) {
+          return Stack(
+            children: [
+              // 1. 底层：弹窗内容（只有在显示时才渲染）
+              if (_isShowingPopup) ...[
                 _buildPopupBackground(),
-                Positioned(
-                  left: position.left,
-                  right: position.right,
-                  bottom: position.bottom,
-                  child: ChatWindowContent(
-                    animationController: _partScreenAnimationController,
-                    minHeight: minHeight,
-                    maxHeight: maxHeight,
-                    chatWidth: chatWidth,
-                  ),
-                ),
+                _buildPopupContent(constraints),
               ],
-            );
-          },
-        ),
+              // 2. 顶层：FloatingIcon（始终在最上层，事件不被遮挡）
+              _buildFloatingIcon(),
+            ],
+          );
+        },
       ),
     );
   }
@@ -120,23 +96,125 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
           messageService.abortReply();
           messageService.initializeEmpty();
         },
-        child: Container(
-          color: Colors.black.withOpacity(0.1),
-        ),
+        child: SizedBox.expand()
+      ),
+    );
+  }
+
+  Widget _buildPopupContent(BoxConstraints constraints) {
+    final position = _calculatePosition(constraints);
+    final double minHeight = constraints.maxHeight * 0.16;
+    final double maxHeight = constraints.maxHeight * 0.4;
+    final double chatWidth = constraints.maxWidth * 0.94;
+
+    return Positioned(
+      left: position.left,
+      right: position.right,
+      bottom: position.bottom,
+      child: ChatWindowContent(
+        animationController: _partScreenAnimationController,
+        minHeight: minHeight,
+        maxHeight: maxHeight,
+        chatWidth: chatWidth,
       ),
     );
   }
 
   Widget _buildFloatingIcon() {
+    // 如果外部传入了 child，优先使用它的属性
+    if (widget.child != null) {
+      return ChatFloatingIcon(
+        iconSize: widget.child!.iconSize ?? widget.iconSize ?? _iconSizeDefault,
+        icon: widget.child!.icon ?? widget.icon,
+        onTap: () async {
+          debugPrint('🖱️ FloatingIcon onTap triggered! (using child properties)');
+          // 先执行外部传入的 onTap（如果有）
+          if (widget.child!.onTap != null) {
+            widget.child!.onTap!();
+          } else {
+            // 默认行为：关闭弹窗并打开全屏
+            final messageService = context.read<MessageService>();
+            _removeOverlay();
+
+            await Navigator.of(context).push(
+              MaterialPageRoute(
+                builder: (context) => ChangeNotifierProvider.value(
+                  value: messageService,
+                  child: const FullScreenPage(),
+                ),
+              ),
+            );
+          }
+        },
+        onLongPress: () async {
+          debugPrint('⏳ FloatingIcon onLongPress triggered! (using child properties)');
+          // 先执行外部传入的 onLongPress（如果有）
+          if (widget.child!.onLongPress != null) {
+            widget.child!.onLongPress!();
+          }
+          // 执行内部业务逻辑
+          final messageService = MessageService.instance;
+          _insertOverlay();
+          await messageService.startVoiceInput();
+        },
+        onLongPressUp: () async {
+          debugPrint('⏫ FloatingIcon onLongPressUp triggered! (using child properties)');
+          // 先执行外部传入的 onLongPressUp（如果有）
+          if (widget.child!.onLongPressUp != null) {
+            widget.child!.onLongPressUp!();
+          }
+          // 执行内部业务逻辑
+          final messageService = MessageService.instance;
+          await messageService.stopAndProcessVoiceInput();
+          final hasMessage = messageService.messages.isNotEmpty;
+          if (!hasMessage) {
+            _removeOverlay();
+          }
+        },
+        onPositionChanged: (position) {
+          debugPrint('📍 FloatingIcon position changed: $position (using child properties)');
+          // 先执行外部传入的 onPositionChanged（如果有）
+          if (widget.child!.onPositionChanged != null) {
+            widget.child!.onPositionChanged!(position);
+          }
+          // 执行内部业务逻辑
+          setState(() {
+            _iconPosition = position;
+          });
+        },
+        // 传递其他可能的属性
+        onLongPressEnd: widget.child!.onLongPressEnd,
+        onDragStart: widget.child!.onDragStart,
+        onDragEnd: widget.child!.onDragEnd,
+      );
+    }
+
+    // 如果没有传入 child，使用原来的逻辑
     return ChatFloatingIcon(
       iconSize: widget.iconSize ?? _iconSizeDefault,
       icon: widget.icon,
+      onTap: () async {
+        debugPrint('🖱️ FloatingIcon onTap triggered!');
+        final messageService = context.read<MessageService>();
+        _removeOverlay();
+
+        await Navigator.of(context).push(
+          MaterialPageRoute(
+            builder: (context) => ChangeNotifierProvider.value(
+              value: messageService, // 传递同一个单例实例
+              child: const FullScreenPage(),
+            ),
+          ),
+        );
+      },
       onLongPress: () async {
+        debugPrint('⏳ FloatingIcon onLongPress triggered!');
         final messageService = MessageService.instance;
         _insertOverlay();
         await messageService.startVoiceInput();
       },
       onLongPressUp: () async {
+        debugPrint('⏫ FloatingIcon onLongPressUp triggered!');
         final messageService = MessageService.instance;
         await messageService.stopAndProcessVoiceInput();
         final hasMessage = messageService.messages.isNotEmpty;
@@ -145,11 +223,10 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
         }
       },
       onPositionChanged: (position) {
+        debugPrint('📍 FloatingIcon position changed: $position');
         setState(() {
           _iconPosition = position;
         });
-        // 重新构建 overlay 以更新弹窗位置
-        _overlayEntry?.markNeedsBuild();
       },
     );
   }
@@ -199,10 +276,4 @@ class _ChatPopupState extends State<ChatPopup> with SingleTickerProviderStateMix
       bottom: chatBottom,
     );
   }
-
-  @override
-  Widget build(BuildContext context) {
-    // 只渲染 FloatingIcon，Overlay 弹窗内容在长按时插入
-    return _buildFloatingIcon();
-  }
 }