修复AI分析SSE流断开：中间件透传Flusher、DB Key生效、错误提示不覆盖

web/frontend/src/components/ScoreDetailDrawer.vue

@@ -31,7 +31,7 @@ async function askAI() {
   aiContent.value = ''
   aiError.value = ''
 
-  const url = `/api/v1/ai/analyze?ts_code=${encodeURIComponent(score.value.ts_code)}&trade_date=${encodeURIComponent(score.value.trade_date)}`
+  const url = `/api/ai/analyze?ts_code=${encodeURIComponent(score.value.ts_code)}&trade_date=${encodeURIComponent(score.value.trade_date)}`
   es = new EventSource(url)
   es.addEventListener('token', (e) => {
     aiContent.value += e.data
@@ -44,7 +44,7 @@ async function askAI() {
     closeAI()
   })
   es.onerror = () => {
-    if (!aiContent.value) aiError.value = '连接中断'
+    if (!aiContent.value && !aiError.value) aiError.value = '连接中断'
     closeAI()
   }
 }
@@ -267,7 +267,7 @@ const quadrantLabel = (q: string) => {
             🤖 AI 分析当前打分
           </el-button>
         </div>
-        <div v-if="aiLoading || aiContent" class="ai-card">
+        <div v-if="aiLoading || aiContent || aiError" class="ai-card">
           <div class="ai-header">
             <span>🤖 AI 分析</span>
             <el-button text size="small" @click="closeAI" v-if="aiLoading">取消</el-button>