diff --git a/airhub_app/lib/features/badge/presentation/controllers/badge_transfer_controller.dart b/airhub_app/lib/features/badge/presentation/controllers/badge_transfer_controller.dart
index c0f7c57..194220b 100644
--- a/airhub_app/lib/features/badge/presentation/controllers/badge_transfer_controller.dart
+++ b/airhub_app/lib/features/badge/presentation/controllers/badge_transfer_controller.dart
@@ -46,7 +46,11 @@ class BadgeTransferController extends _$BadgeTransferController {
   void startScan() {
     if (!ref.mounted) return;
     state = state.copyWith(status: TransferStatus.scanning);
-    FlutterBluePlus.startScan(timeout: const Duration(seconds: 10));
+    FlutterBluePlus.startScan(timeout: const Duration(seconds: 10)).catchError((e) {
+      // Web 平台: 用户取消 requestDevice() 选择器会抛出异常
+      if (!ref.mounted) return;
+      state = state.copyWith(status: TransferStatus.idle);
+    });
 
     FlutterBluePlus.scanResults.listen((results) {
       if (!ref.mounted) return;
diff --git a/airhub_app/lib/features/badge/presentation/pages/badge_home_page.dart b/airhub_app/lib/features/badge/presentation/pages/badge_home_page.dart
index 57620cc..c795d5b 100644
--- a/airhub_app/lib/features/badge/presentation/pages/badge_home_page.dart
+++ b/airhub_app/lib/features/badge/presentation/pages/badge_home_page.dart
@@ -29,7 +29,6 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
   double _genProgress = 0;
   String _genStatus = '';
   String? _generatedImageUrl;
-  bool _hasAiResult = false;
 
   @override
   void initState() {
@@ -43,7 +42,6 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
     final pending = BadgeAiGenerationService.instance.consumePendingResult();
     if (pending != null) {
       _generatedImageUrl = pending.imageUrl;
-      _hasAiResult = true;
     }
 
     // 注册 AI 服务回调
@@ -61,7 +59,6 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
         setState(() {
           _isGenerating = false;
           _generatedImageUrl = result.imageUrl;
-          _hasAiResult = true;
         });
         _showResultDialog(result.imageUrl);
       }
@@ -213,7 +210,6 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
     setState(() {
       _isGenerating = true;
       _generatedImageUrl = null;
-      _hasAiResult = false;
       _genProgress = 0;
       _genStatus = '正在连接 AI...';
     });
@@ -242,7 +238,6 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
   void _handleRetry() {
     setState(() {
       _generatedImageUrl = null;
-      _hasAiResult = false;
     });
   }
 
@@ -420,31 +415,33 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
     Widget? buttonContent;
 
     if (isAiTab) {
-      // 有结果时由弹窗处理，底部只显示"开始生成"
-      if (!_isGenerating && !_hasAiResult) {
-        buttonContent = _buildGradientButton('开始生成', () {
-          final aiState = _aiTabKey.currentState;
-          if (aiState == null) return;
-          final prompt = aiState.currentPrompt;
-          final isI2I = aiState.referenceImageBytes != null;
-          // 文生图必须输入描述，图生图可选
-          if (!isI2I && prompt.isEmpty) {
-            ScaffoldMessenger.of(context).showSnackBar(
-              const SnackBar(
-                content: Text('请输入图片描述'),
-                backgroundColor: Colors.orange,
-              ),
-            );
-            return;
-          }
-          _handleAiGenerate(
-            prompt: prompt,
-            style: aiState.selectedStyle,
-            imageBytes: aiState.referenceImageBytes,
-            strength: aiState.strength,
-          );
-        });
-      }
+      buttonContent = _buildGradientButton(
+        '开始生成',
+        _isGenerating
+            ? null
+            : () {
+                final aiState = _aiTabKey.currentState;
+                if (aiState == null) return;
+                final prompt = aiState.currentPrompt;
+                final isI2I = aiState.referenceImageBytes != null;
+                // 文生图必须输入描述，图生图可选
+                if (!isI2I && prompt.isEmpty) {
+                  ScaffoldMessenger.of(context).showSnackBar(
+                    const SnackBar(
+                      content: Text('请输入图片描述'),
+                      backgroundColor: Colors.orange,
+                    ),
+                  );
+                  return;
+                }
+                _handleAiGenerate(
+                  prompt: prompt,
+                  style: aiState.selectedStyle,
+                  imageBytes: aiState.referenceImageBytes,
+                  strength: aiState.strength,
+                );
+              },
+      );
     } else if (isUploadTab) {
       if (_uploadedImagePath != null) {
         buttonContent = _buildGradientButton('使用此图', _handleUseImage);
@@ -474,7 +471,7 @@ class _BadgeHomePageState extends ConsumerState<BadgeHomePage>
     );
   }
 
-  Widget _buildGradientButton(String label, VoidCallback onPressed) {
+  Widget _buildGradientButton(String label, VoidCallback? onPressed) {
     return SizedBox(
       height: 52,
       child: DecoratedBox(
diff --git a/airhub_app/lib/features/badge/presentation/pages/badge_transfer_page.dart b/airhub_app/lib/features/badge/presentation/pages/badge_transfer_page.dart
index 2b29938..6cf0b75 100644
--- a/airhub_app/lib/features/badge/presentation/pages/badge_transfer_page.dart
+++ b/airhub_app/lib/features/badge/presentation/pages/badge_transfer_page.dart
@@ -45,7 +45,10 @@ class _BadgeTransferPageState extends ConsumerState<BadgeTransferPage> {
   }
 
   void _startScan() {
-    FlutterBluePlus.startScan(timeout: const Duration(seconds: 10));
+    FlutterBluePlus.startScan(timeout: const Duration(seconds: 10)).catchError((e) {
+      // Web 平台: 用户取消 requestDevice() 选择器会抛出异常
+      debugPrint('[Badge BLE] startScan 异常（用户可能取消了选择器）: $e');
+    });
   }
 
   @override
diff --git a/airhub_app/lib/pages/bluetooth_page.dart b/airhub_app/lib/pages/bluetooth_page.dart
index cd94aae..1da1b51 100644
--- a/airhub_app/lib/pages/bluetooth_page.dart
+++ b/airhub_app/lib/pages/bluetooth_page.dart
@@ -218,10 +218,19 @@ class _BluetoothPageState extends ConsumerState<BluetoothPage>
     });
 
     // 持续扫描（不设超时），由 _queryDeviceByMac 成功后停止
-    await FlutterBluePlus.startScan(
-      timeout: const Duration(seconds: 30),
-      androidUsesFineLocation: true,
-    );
+    try {
+      await FlutterBluePlus.startScan(
+        timeout: const Duration(seconds: 30),
+        androidUsesFineLocation: true,
+      );
+    } catch (e) {
+      // Web 平台: 用户取消 requestDevice() 选择器会抛出 FlutterBluePlusException
+      debugPrint('[BLE Scan] startScan 异常（用户可能取消了选择器）: $e');
+      if (mounted) {
+        setState(() => _isSearching = false);
+      }
+      return;
+    }
 
     // 30 秒兜底超时：如果始终没找到设备
     if (mounted && _isSearching) {