feat: 增强输入框状态管理，添加禁用状态和恢复输入状态的逻辑

src/utils/messageHandler.ts

@@ -96,6 +96,12 @@ export async function handleUserMessage(
         text: "后端服务不可用",
         type: "error",
       });
+      // 恢复输入状态
+      panel.webview.postMessage({
+        command: "updateSegments",
+        segments: [],
+        isComplete: true,
+      });
       throw error;
     }
   }
@@ -255,6 +261,12 @@ async function handleUserMessageWithBackend(
             command: "receiveMessage",
             text: `❌ 错误: ${message}`,
           });
+          // 恢复输入状态
+          panel.webview.postMessage({
+            command: "updateSegments",
+            segments: [],
+            isComplete: true,
+          });
           reject(new Error(message));
         },
 

src/views/inputArea.ts

@@ -197,6 +197,11 @@ export function getInputAreaStyles(): string {
       overflow-y: auto;
       line-height: 1.5;
     }
+    textarea:disabled {
+      opacity: 0.5;
+      cursor: not-allowed;
+      background: rgba(128, 128, 128, 0.1);
+    }
     /* 简洁的滚动条样式 */
     textarea::-webkit-scrollbar {
       width: 8px;
@@ -300,11 +305,17 @@ export function getInputAreaScript(): string {
         sendIconContainer.style.display = 'none';
         stopIconContainer.style.display = 'block';
         isConversationActive = true;
+        // 禁用输入框
+        messageInput.disabled = true;
+        messageInput.placeholder = '正在处理中，请稍候...';
       } else {
         sendButton.classList.remove('sending');
         sendIconContainer.style.display = 'block';
         stopIconContainer.style.display = 'none';
         isConversationActive = false;
+        // 启用输入框
+        messageInput.disabled = false;
+        messageInput.placeholder = '输入您的问题，按 Enter 发送，Shift + Enter 换行...';
       }
     }
 
@@ -324,6 +335,11 @@ export function getInputAreaScript(): string {
       const text = messageInput.value.trim();
       if (!text) return;
 
+      // 如果正在对话中，阻止发送新消息
+      if (isConversationActive) {
+        return;
+      }
+
       // 检查工作区状态
       if (!hasWorkspace) {
         // 如果没有工作区，阻止发送并清空输入框