refactor(admin): AI 对话收敛为统一 ui.artifact 协议，移除 legacy 事件处理

apps/admin/src/components/AiChat/provider.ts

@@ -191,32 +191,6 @@ export class GongxueAiChatProvider extends AbstractChatProvider<
       this.onExternalArtifact?.(payload.messageId, payload.artifact);
       return info.originMessage ?? emptyAssistant();
     }
-    if (
-      event === 'ui.form' &&
-      payload.form &&
-      typeof payload.messageId === 'number' &&
-      info.originMessage?.id !== payload.messageId
-    ) {
-      this.onExternalArtifact?.(payload.messageId, {
-        id: payload.form.id,
-        type: 'form',
-        status: payload.form.status ?? 'pending',
-        messageId: payload.messageId,
-        payload: payload.form,
-      });
-      return info.originMessage ?? emptyAssistant();
-    }
-    if (
-      event === 'ui.review' &&
-      payload.review &&
-      typeof payload.messageId === 'number' &&
-      info.originMessage?.id !== payload.messageId
-    ) {
-      // The submitted review belongs to the original assistant message;
-      // do not merge it into the message currently being streamed.
-      this.onExternalReview?.(payload.messageId, payload.review);
-      return info.originMessage ?? emptyAssistant();
-    }
     return reduceAiSseMessage(info.originMessage, info.chunk);
   }
 }