feat(ssa): Complete V11 UI development and frontend-backend integration - Pixel-perfect V11 UI, multi-task support, Word export, input overlay fix, code cleanup. MVP Phase 1 core 95% complete.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/modules/ssa/executor/RClientService.ts

@@ -30,10 +30,14 @@ export class RClientService {
   async execute(sessionId: string, plan: any, session: any): Promise<any> {
     const startTime = Date.now();
     
+    // 从 OSS Key 或 session title 提取原始文件名
+    const originalFilename = this.extractFilename(session);
+    
     // 构建请求体（使用统一存储服务）
     const requestBody = {
       data_source: await this.buildDataSource(session),
       params: plan.params,
+      original_filename: originalFilename,
       guardrails: plan.guardrails || {
         check_normality: true,
         auto_fix: true
@@ -127,6 +131,28 @@ export class RClientService {
     };
   }
   
+  /**
+   * 从 session 提取原始文件名
+   */
+  private extractFilename(session: any): string {
+    // 优先从 title 获取（上传时会设置为文件名）
+    if (session.title) {
+      // 如果 title 不包含扩展名，添加 .csv
+      if (!session.title.match(/\.(csv|xlsx|xls)$/i)) {
+        return `${session.title}.csv`;
+      }
+      return session.title;
+    }
+    
+    // 从 OSS Key 提取
+    if (session.dataOssKey) {
+      const parts = session.dataOssKey.split('/');
+      return parts[parts.length - 1] || 'data.csv';
+    }
+    
+    return 'data.csv';
+  }
+  
   async healthCheck(): Promise<boolean> {
     try {
       const res = await this.client.get('/health');