fix(admin,api): 上分超额提示而非静默截断，并返回中文业务错误

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

apps/api/src/shared/common/filters.ts

@@ -20,7 +20,16 @@ export class GlobalExceptionFilter implements ExceptionFilter {
     if (exception instanceof HttpException) {
       status = exception.getStatus();
       const res = exception.getResponse();
-      message = typeof res === 'string' ? res : (res as { message?: string }).message || message;
+      if (typeof res === 'string') {
+        message = res;
+      } else if (typeof res === 'object' && res !== null) {
+        const body = res as { message?: string | string[] };
+        if (Array.isArray(body.message)) {
+          message = body.message.join('；');
+        } else if (typeof body.message === 'string' && body.message.trim()) {
+          message = body.message;
+        }
+      }
     } else if (exception instanceof Error) {
       message = exception.message;
     }