feat(agent_view): 添加聊天区域点击收起键盘功能并优化焦点控制

- 新增 FocusNode 用于控制 TextField 焦点
- 点击聊天区域时收起键盘并收起扩展选项
- 切换输入模式时自动管理焦点状态

lib/modules/agent/views/agent_view.dart

@@ -25,6 +25,9 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
   late MessageActionController messageActionController;
   double _keyboardHeight = 0;
 
+  // 👇 新增：用于控制 TextField 焦点
+  final FocusNode _textFocusNode = FocusNode();
+
   @override
   void initState() {
     super.initState();
@@ -35,6 +38,7 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
 
   @override
   void dispose() {
+    _textFocusNode.dispose();
     WidgetsBinding.instance.removeObserver(this);
     super.dispose();
   }
@@ -286,6 +290,14 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
             children: [
               // 聊天内容
               Expanded(
+                child: GestureDetector(
+                  onTap: () {
+                    // 点击聊天区域时，收起键盘并切换工具显示状态
+                    FocusScope.of(context).unfocus();
+                    if (controller.isPlusOptionsExpanded.value) {
+                      controller.collapsePlusOptions();
+                    }
+                  },
                   child: Obx(() {
                     return Align(
                       alignment: Alignment.topCenter,
@@ -316,25 +328,29 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
                                     return IntroOverlayBuilder.aiBuilder(
                                       params,
                                       controller.noviceGuideService.aiStepsList[
-                                        controller
-                                            .noviceGuideService.aiStep]['end'],
+                                          controller.noviceGuideService
+                                              .aiStep]['end'],
                                       onFinish: () async {
-                                      if (controller.noviceGuideService.aiStep <
+                                        if (controller
+                                                .noviceGuideService.aiStep <
                                             5) {
-                                        await Future.delayed(
-                                            const Duration(milliseconds: 300));
-                                        controller.noviceGuideService.aiStep++;
+                                          await Future.delayed(const Duration(
+                                              milliseconds: 300));
+                                          controller
+                                              .noviceGuideService.aiStep++;
                                           Intro.of(Get.context!)
                                               .start(group: 'ai', reset: true);
                                         }
                                       },
                                       onTap: () async {
                                         params.onFinish();
-                                      if (controller.noviceGuideService.aiStep <
+                                        if (controller
+                                                .noviceGuideService.aiStep <
                                             5) {
-                                        await Future.delayed(
-                                            const Duration(milliseconds: 300));
-                                        controller.noviceGuideService.aiStep++;
+                                          await Future.delayed(const Duration(
+                                              milliseconds: 300));
+                                          controller
+                                              .noviceGuideService.aiStep++;
                                           Intro.of(Get.context!)
                                               .start(group: 'ai', reset: true);
                                         }
@@ -374,8 +390,9 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
                                   child: GestureDetector(
                                     onLongPressStart:
                                         (LongPressStartDetails details) {
-                                    messageActionController.onLongPressMessage(
-                                        context, isDarkMode, details, message);
+                                      messageActionController
+                                          .onLongPressMessage(context,
+                                              isDarkMode, details, message);
                                     },
                                     child: MessageBubble(
                                       sessionid: message.sessionid,
@@ -397,6 +414,7 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
                     );
                   }),
                 ),
+              ),
 
               // 输入区域
               Container(
@@ -553,6 +571,13 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
                               return GestureDetector(
                                 onTap: () {
                                   controller.toggleInputMode();
+                                  // 切换模式时，确保焦点正确
+                                  if (!isTextMode) {
+                                    // 切换到语音模式时，请求焦点
+                                    Future.delayed(Duration.zero, () {
+                                      _textFocusNode.requestFocus();
+                                    });
+                                  }
                                 },
                                 child: Container(
                                   width: 44.w,
@@ -652,6 +677,7 @@ class _AgentViewState extends State<AgentView> with WidgetsBindingObserver {
                                             controller.isImageInputActive.value;
 
                                         return TextField(
+                                          focusNode: _textFocusNode, // 绑定焦点节点
                                           controller: controller.textController,
                                           maxLines: isImageActive
                                               ? 3