refactor(AI): 优化打字机效果和流式回答处理

- 调整打字速度为 30 毫秒/字
- 修复流式回答中思考状态的判断逻辑
- 优化打字机效果，支持整块文本的逐字输出
- 调整代码结构，提高可读性和可维护性

src/views/AI/components/chat.vue

@@ -106,8 +106,9 @@ export default {
       // 打字机相关
       typingText: '',
       typingQueue: [],
+      typingQueueText: [],
       isTyping: false,
-      typingSpeed: 50,
+      typingSpeed: 30,
       typingTimeout: null,
     }
   },
@@ -269,8 +270,8 @@ export default {
         if (data.answer) {
           this.answerMap += data.answer
         }
-        this.updateConversationState(data)
-        return data
+
+        return this.updateConversationState(data)
       } catch (error) {
         console.error('流数据解析失败:', error)
         return null
@@ -279,27 +280,42 @@ export default {
     updateConversationState(data) {
       this.$emit('update:conversationId', data.conversation_id || '')
       if (data.answer && data.answer.indexOf('<think>') !== -1) {
+        data.isThink = true
         this.isThink = true
         this.$emit('getIsThink', true)
       }
       if (data.answer && data.answer.indexOf('</think>') !== -1) {
+        data.isThink = true
         this.isThink = false
         this.$emit('getIsThink', false)
       }
+      if (data.answer && this.isThink) {
+        data.isThink = true
+      }
+      if (data.answer && !this.isThink) {
+        data.isThink = false
+      }
+
+      return data
     },
-    updateMessageContent({ answer, event }) {
+    updateMessageContent(parse) {
+      let { event, answer, isThink } = parse
       if (event === 'message_end') {
         this.$emit('update:messageStatus', 'stop')
       }
       if (!this.currentMessage || !answer) return
-      const mode = this.isThink ? 'think' : 'text'
-      const chars = answer.split('')
-      this.typingQueue.push(...chars)
+      const mode = isThink ? 'think' : 'text'
+      const chars = {
+        answer: answer,
+        isThink: isThink,
+      }
+
+      this.typingQueue.push(chars)
       if (!this.isTyping) {
         this.startTypingAnimation(mode)
       }
     },
-    startTypingAnimation(mode) {
+    startTypingAnimation() {
       this.isTyping = true
 
       const typeNextChar = () => {
@@ -308,10 +324,24 @@ export default {
           return
         }
 
-        const char = this.typingQueue.shift()
-        this.currentMessage[mode] += char
+        // 取出一个完整文本块
+        const chunk = this.typingQueue.shift()
+        const chars = chunk.answer.split('')
+        const isThink = chunk.isThink
+        // 内部递归函数，用于逐字输出当前块
+        const outputChar = () => {
+          if (chars.length === 0) {
+            // 当前块输出完毕，继续处理下一个
+            setTimeout(typeNextChar, 10)
+            return
+          }
+          const char = chars.shift()
+          this.currentMessage[isThink ? 'think' : 'text'] += char
+          const delay = this.getTypingDelay(char)
+          setTimeout(outputChar, delay)
+        }
 
-        this.typingTimeout = setTimeout(typeNextChar, this.getTypingDelay(char))
+        outputChar()
       }
 
       typeNextChar()