fix: keep Pascal agent progress visible

services/pascal-editor/apps/editor/components/ai-design-agent-panel.tsx

@@ -140,6 +140,28 @@ function ToolActivity({ part }: { part: DisplayPart }) {
   )
 }
 
+function processingStatusText(messages: UIMessage[], status: string): string {
+  if (status === 'submitted') return '正在分析当前场景'
+
+  for (let messageIndex = messages.length - 1; messageIndex >= 0; messageIndex--) {
+    const message = messages[messageIndex]
+    if (message?.role !== 'assistant') continue
+
+    for (let partIndex = message.parts.length - 1; partIndex >= 0; partIndex--) {
+      const part = displayPartFrom(message.parts[partIndex])
+      const toolName = toolNameFromPart(part)
+      if (toolName) {
+        if (part.state === 'output-available') return '正在校验并保存建模结果'
+        if (part.state === 'output-error') return '正在调整执行方案'
+        return `正在${TOOL_LABELS[toolName] ?? toolName.replaceAll('_', ' ')}`
+      }
+      if (part.type === 'text' && part.text) return '正在继续处理建模任务'
+    }
+  }
+
+  return '正在生成建模方案'
+}
+
 export function AiDesignAgentPanel({ sceneId }: AiDesignAgentPanelProps) {
   const activeConversationKey = `pascal-agent-active-conversation:${sceneId}`
   const [input, setInput] = useState('')
@@ -174,6 +196,10 @@ export function AiDesignAgentPanel({ sceneId }: AiDesignAgentPanelProps) {
     transport,
   })
   const isRunning = status === 'submitted' || status === 'streaming'
+  const runningStatusText = useMemo(
+    () => processingStatusText(messages, status),
+    [messages, status],
+  )
   const latestMessageRenderKey = useMemo(() => {
     const latest = messages.at(-1)
     if (!latest) return ''
@@ -538,15 +564,19 @@ export function AiDesignAgentPanel({ sceneId }: AiDesignAgentPanelProps) {
                 </div>
               </div>
             ))}
-            {status === 'submitted' ? (
-              <div className="flex items-center gap-2 text-muted-foreground text-xs">
-                <LoaderCircle className="h-3.5 w-3.5 animate-spin" />
-                正在分析当前场景
-              </div>
-            ) : null}
-            <div ref={endRef} />
           </div>
         )}
+        {isRunning ? (
+          <div
+            aria-live="polite"
+            className="mt-4 flex items-center gap-2 text-muted-foreground text-xs"
+            role="status"
+          >
+            <LoaderCircle className="h-3.5 w-3.5 shrink-0 animate-spin" />
+            <span>{runningStatusText}</span>
+          </div>
+        ) : null}
+        <div ref={endRef} />
       </div>
 
       <div className="shrink-0 border-border/70 border-t p-3">