fix(chat): fix VoiceMicButton gesture conflict with IconButton tooltip

GestureDetector was fighting with IconButton's inner Tooltip gesture
recognizer — onLongPressStart was never called (only vibration from
tooltip). Replaced with Listener (raw pointer events) + manual 500ms
Timer, which bypasses the gesture arena entirely.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

it0_app/lib/features/chat/presentation/widgets/voice_mic_button.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:path_provider/path_provider.dart';
@@ -6,11 +7,12 @@ import '../../../../core/theme/app_colors.dart';
 
 /// WhatsApp-style press-and-hold mic button.
 ///
-/// • Press and hold → records audio to a temp file.
+/// • Press and hold (≥500 ms) → records audio to a temp file.
 /// • Release → stops recording and calls [onAudioReady] with the file path.
 /// • Slide up while holding → cancels recording without sending.
 ///
-/// Requires microphone permission (handled by the `record` package).
+/// Uses [Listener] (raw pointer events) instead of [GestureDetector] so that
+/// the inner [IconButton] tooltip/InkWell never steals the gesture.
 class VoiceMicButton extends StatefulWidget {
   /// Called with the temp file path when the user releases the button.
   final void Function(String audioPath) onAudioReady;
@@ -33,6 +35,8 @@ class _VoiceMicButtonState extends State<VoiceMicButton>
   final _recorder = AudioRecorder();
   bool _isRecording = false;
   bool _cancelled = false;
+  bool _pointerDown = false;
+  Timer? _longPressTimer;
 
   // Slide-up cancel threshold (pixels above press origin)
   static const double _cancelThreshold = 60.0;
@@ -55,12 +59,14 @@ class _VoiceMicButtonState extends State<VoiceMicButton>
 
   @override
   void dispose() {
+    _longPressTimer?.cancel();
     _recorder.dispose();
     _pulseController.dispose();
     super.dispose();
   }
 
   Future<void> _startRecording() async {
+    if (!mounted) return;
     final hasPermission = await _recorder.hasPermission();
     if (!hasPermission) {
       if (mounted) {
@@ -72,18 +78,21 @@ class _VoiceMicButtonState extends State<VoiceMicButton>
     }
 
     final dir = await getTemporaryDirectory();
-    final path = '${dir.path}/voice_${DateTime.now().millisecondsSinceEpoch}.m4a';
+    final path =
+        '${dir.path}/voice_${DateTime.now().millisecondsSinceEpoch}.m4a';
 
     await _recorder.start(
       const RecordConfig(encoder: AudioEncoder.aacLc, sampleRate: 16000),
       path: path,
     );
 
-    setState(() {
-      _isRecording = true;
-      _cancelled = false;
-    });
-    _pulseController.repeat(reverse: true);
+    if (mounted) {
+      setState(() {
+        _isRecording = true;
+        _cancelled = false;
+      });
+      _pulseController.repeat(reverse: true);
+    }
   }
 
   Future<void> _stopRecording({required bool cancel}) async {
@@ -93,11 +102,11 @@ class _VoiceMicButtonState extends State<VoiceMicButton>
     _pulseController.reset();
 
     final path = await _recorder.stop();
-    setState(() => _isRecording = false);
+    if (mounted) setState(() => _isRecording = false);
 
     if (cancel || path == null) return;
 
-    // Ignore empty recordings (< ~0.3s)
+    // Ignore empty recordings (< ~0.3 s)
     try {
       final size = await File(path).length();
       if (size < 2048) return;
@@ -108,79 +117,84 @@ class _VoiceMicButtonState extends State<VoiceMicButton>
     widget.onAudioReady(path);
   }
 
-  void _onLongPressStart(LongPressStartDetails details) {
+  void _onPointerDown(PointerDownEvent event) {
     if (widget.disabled) return;
-    _pressOrigin = details.globalPosition;
-    _startRecording();
+    _pressOrigin = event.position;
+    _pointerDown = true;
+    _cancelled = false;
+    _longPressTimer?.cancel();
+    // Start recording after 500 ms hold
+    _longPressTimer = Timer(const Duration(milliseconds: 500), () {
+      if (_pointerDown && mounted) _startRecording();
+    });
   }
 
-  void _onLongPressMoveUpdate(LongPressMoveUpdateDetails details) {
+  void _onPointerMove(PointerMoveEvent event) {
     if (_pressOrigin == null || !_isRecording) return;
-    final dy = _pressOrigin!.dy - details.globalPosition.dy;
+    final dy = _pressOrigin!.dy - event.position.dy;
     setState(() => _cancelled = dy > _cancelThreshold);
   }
 
-  void _onLongPressEnd(LongPressEndDetails details) {
+  void _onPointerUp(PointerUpEvent event) {
+    _pointerDown = false;
+    _longPressTimer?.cancel();
     _stopRecording(cancel: _cancelled);
     _pressOrigin = null;
   }
 
-  void _onLongPressCancel() {
+  void _onPointerCancel(PointerCancelEvent event) {
+    _pointerDown = false;
+    _longPressTimer?.cancel();
     _stopRecording(cancel: true);
     _pressOrigin = null;
   }
 
   @override
   Widget build(BuildContext context) {
-    if (_isRecording) {
-      return _buildRecordingButton();
-    }
-    return GestureDetector(
-      onLongPressStart: _onLongPressStart,
-      onLongPressMoveUpdate: _onLongPressMoveUpdate,
-      onLongPressEnd: _onLongPressEnd,
-      onLongPressCancel: _onLongPressCancel,
-      child: IconButton(
-        icon: Icon(
-          Icons.mic_none,
-          size: 22,
-          color: widget.disabled ? AppColors.textMuted : null,
-        ),
-        tooltip: '按住录音',
-        onPressed: widget.disabled ? null : () {},
-      ),
+    return Listener(
+      onPointerDown: _onPointerDown,
+      onPointerMove: _onPointerMove,
+      onPointerUp: _onPointerUp,
+      onPointerCancel: _onPointerCancel,
+      child: _isRecording ? _buildRecordingWidget() : _buildIdleWidget(),
     );
   }
 
-  Widget _buildRecordingButton() {
-    final isCancelling = _cancelled;
-    return GestureDetector(
-      onLongPressMoveUpdate: _onLongPressMoveUpdate,
-      onLongPressEnd: _onLongPressEnd,
-      onLongPressCancel: _onLongPressCancel,
-      child: Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 4),
-        child: Row(
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            ScaleTransition(
-              scale: _pulseAnimation,
-              child: Icon(
-                Icons.mic,
-                size: 22,
-                color: isCancelling ? AppColors.textMuted : AppColors.error,
-              ),
+  Widget _buildIdleWidget() {
+    return IconButton(
+      icon: Icon(
+        Icons.mic_none,
+        size: 22,
+        color: widget.disabled ? AppColors.textMuted : null,
+      ),
+      tooltip: '按住录音',
+      onPressed: widget.disabled ? null : () {},
+    );
+  }
+
+  Widget _buildRecordingWidget() {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 4),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          ScaleTransition(
+            scale: _pulseAnimation,
+            child: Icon(
+              Icons.mic,
+              size: 22,
+              color: _cancelled ? AppColors.textMuted : AppColors.error,
             ),
-            const SizedBox(width: 4),
-            Text(
-              isCancelling ? '松开取消' : '松开发送',
-              style: TextStyle(
-                fontSize: 12,
-                color: isCancelling ? AppColors.textMuted : AppColors.error,
-              ),
+          ),
+          const SizedBox(width: 4),
+          Text(
+            _cancelled ? '松开取消' : '松开发送',
+            style: TextStyle(
+              fontSize: 12,
+              color: _cancelled ? AppColors.textMuted : AppColors.error,
             ),
-          ],
-        ),
+          ),
+        ],
       ),
     );
   }