fix: stream real agent reasoning

src/web/pages/ComfyUIAgent.tsx

@@ -1349,22 +1349,16 @@ export default function ComfyUIAgent() {
   const renderReasoning = (message: AgentMessage | StreamAccumulator, isStreaming = false) => {
     const processed = processThinkTags(message.content || '', message.reasoningContent || '');
     const hasReasoning = processed.reasoningContent.trim().length > 0;
-    if (!hasReasoning && !isStreaming) return null;
+    if (!hasReasoning) return null;
     return (
       <details open={isStreaming} style={reasoningBoxStyle}>
         <summary style={reasoningSummaryStyle}>
           思考过程
         </summary>
-        {hasReasoning ? (
-          <div
-            style={reasoningContentStyle}
-            dangerouslySetInnerHTML={{ __html: renderMarkdown(processed.reasoningContent) }}
-          />
-        ) : (
-          <div style={reasoningContentStyle}>
-            正在分析你的需求、拆解角色、场景、镜头与后续工作流步骤...
-          </div>
-        )}
+        <div
+          style={reasoningContentStyle}
+          dangerouslySetInnerHTML={{ __html: renderMarkdown(processed.reasoningContent) }}
+        />
       </details>
     );
   };