feat(ai-chat): AI 导入确认流程完善并清理代码质量

- 新增导入确认/映射解析辅助，支持预检后生成导入向导
- 抽取 parseAttachmentArgs/beginImportToolRun 等重复逻辑
- 双重类型断言改为运行时守卫，消除 aislop 告警

apps/server/src/ai-chat/ai-chat.tools.ts

@@ -5,7 +5,6 @@ import {
   executePreflightImport,
   executeRenderChart,
   executeRenderForm,
-  executeRenderReview,
   executeStartImportWizard,
 } from './ai-chat.tool-actions';
 
@@ -91,17 +90,11 @@ export async function executeTool(
     return executeRenderForm(context, messageId, call, userId, emit);
   }
   if (call.name === 'preflight_import') {
-    return executePreflightImport(context, messageId, call, userId, emit);
+    return executePreflightImport(context, messageId, call, agentContext, emit);
   }
   if (call.name === 'start_import_wizard') {
     return executeStartImportWizard(context, messageId, call, agentContext, emit);
   }
-  if (call.name === 'render_review') {
-    if (reviewSubmitted) {
-      return denyTool(context, messageId, call, 'render_review', '导入已确认，无需再次生成预览', '导入已确认', emit);
-    }
-    return executeRenderReview(context, messageId, call, userId, emit);
-  }
   if (call.name === 'render_chart') {
     return executeRenderChart(context, messageId, call, emit);
   }