feat: 范式分析结果改为流式输出

- 修改API analyzeContent方法使用fetch实现流式请求
- 更新AnalysisPanel实时处理流式响应
- 分析过程中实时显示结果，提升用户体验

src/components/AnalysisPanel.vue

@@ -209,7 +209,12 @@ const analyzeArticle = async () => {
   }
 
   isAnalyzing.value = true
-  appStore.analysisResult = null
+  appStore.analysisResult = {
+    paradigm: '分析中...',
+    paradigmType: null,
+    analysis: '',
+    timestamp: new Date()
+  }
 
   try {
     const api = new DeepSeekAPI({ 
@@ -217,21 +222,55 @@ const analyzeArticle = async () => {
       key: appStore.apiKey 
     })
     
-    const result = await api.analyzeContent(analysisText.value)
+    const response = await api.analyzeContent(analysisText.value)
+    const reader = response.body.getReader()
+    const decoder = new TextDecoder()
     
-    // 解析分析结果，提取范式类型
-    const analysisContent = result.choices[0].message.content
-    const detectedParadigm = detectParadigm(analysisContent)
+    let fullContent = ''
     
+    while (true) {
+      const { done, value } = await reader.read()
+      if (done) break
+      
+      const chunk = decoder.decode(value)
+      const lines = chunk.split('\n').filter(line => line.trim())
+      
+      for (const line of lines) {
+        if (line.startsWith('data: ')) {
+          const data = line.slice(6)
+          if (data === '[DONE]') continue
+          
+          try {
+            const parsed = JSON.parse(data)
+            const content = parsed.choices?.[0]?.delta?.content || ''
+            if (content) {
+              fullContent += content
+              // 实时更新分析结果
+              appStore.analysisResult = {
+                paradigm: '分析中...',
+                paradigmType: null,
+                analysis: fullContent,
+                timestamp: new Date()
+              }
+            }
+          } catch (e) {
+            // 忽略解析错误
+          }
+        }
+      }
+    }
+    
+    // 分析完成后检测范式类型
+    const detectedParadigm = detectParadigm(fullContent)
     appStore.analysisResult = {
       paradigm: detectedParadigm.name,
       paradigmType: detectedParadigm.type,
-      analysis: analysisContent,
+      analysis: fullContent,
       timestamp: new Date()
     }
     
     // 添加到历史记录
-    addToHistory(detectedParadigm.name, analysisText.value, analysisContent)
+    addToHistory(detectedParadigm.name, analysisText.value, fullContent)
   } catch (error) {
     appStore.analysisResult = {
       error: true,