fix: treat Tahesab no-records as an empty customer list instead of a 502

Listing all customers no longer fails on the final empty code range, and importing a missing code no longer creates a placeholder person.

apps/api/src/integrations/tahesab/person-link.service.ts

@@ -507,7 +507,13 @@ export class TahesabPersonLinkService {
         dto.moshtariCode,
         dto.moshtariCode,
       );
-      row = (asMoshtariList(raw)[0] ?? {}) as Record<string, unknown>;
+      const found = asMoshtariList(raw)[0];
+      if (!found) {
+        throw new NotFoundException(
+          `مشتری با کد ${dto.moshtariCode} در ته‌حساب یافت نشد.`,
+        );
+      }
+      row = found as Record<string, unknown>;
     }
     const name = pickName(row) || `مشتری ته‌حساب ${dto.moshtariCode}`;
     const tel = pickTel(row);

apps/api/src/integrations/tahesab/tahesab-methods.ts

@@ -176,6 +176,9 @@ export function normalizeMandehResponse(raw: unknown): NormalizedAssets {
   };
 }
 
+/** ته‌حساب برای بازه/جستجوی بدون نتیجه به‌جای لیست خالی خطای «هیچ رکوردی یافت نشد» می‌دهد */
+const NO_RECORDS = { emptyResultOnError: /رکوردی یافت نشد/i };
+
 export class TahesabApi {
   constructor(
     private readonly http: TahesabHttpClient,
@@ -307,15 +310,30 @@ export class TahesabApi {
       [fromCode, toCode],
       'POST',
       opts?.timeoutMs,
+      NO_RECORDS,
     );
   }
 
   doListMoshtariByPhone(phone: string | number) {
-    return this.call('DoListMoshtari-ByPhone', 'DoListMoshtari', [phone]);
+    return this.call(
+      'DoListMoshtari-ByPhone',
+      'DoListMoshtari',
+      [phone],
+      undefined,
+      undefined,
+      NO_RECORDS,
+    );
   }
 
   doListMoshtariByName(name: string) {
-    return this.call('DoListMoshtari-ByName', 'DoListMoshtari', [name]);
+    return this.call(
+      'DoListMoshtari-ByName',
+      'DoListMoshtari',
+      [name],
+      undefined,
+      undefined,
+      NO_RECORDS,
+    );
   }
 
   /** body key حساس به حروف کوچک مثل همکار */