fix(tahesab): stop repeating mande-by-codes on the customer sync list

Watching the paged array retriggered the same POST when mande was empty.

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

src/pages/menuPages/accounting/components/TahesabCustomerSync.vue

@@ -535,6 +535,7 @@ async function loadTahesab() {
       status.value = res
     }
     tahesabOnlyList.value = res.tahesab_only_list?.data ?? []
+    mandeFetched.clear()
     tahesabFetched.value = true
     await enrichPageMande()
   } catch (e) { console.error(e) }
@@ -730,21 +731,37 @@ async function linkPhones() {
   }
 }
 
+const mandeFetched = new Set<number>()
+let mandeInFlightKey = ''
+
 async function enrichPageMande() {
-  const need = pagedTahesab.value.filter(c => c.gold == null && c.cash == null && c.code)
+  const need = pagedTahesab.value.filter(
+    c => c.code && !mandeFetched.has(c.code) && c.gold == null && c.cash == null,
+  )
   if (!need.length) return
+  const key = need.map(c => c.code).join(',')
+  if (mandeInFlightKey === key) return
+  mandeInFlightKey = key
+  need.forEach(c => mandeFetched.add(c.code))
   try {
     const res = await fetchTahesabMandeByCodes(need.map(c => c.code))
     const mandes = res.mandes || {}
-    tahesabOnlyList.value = tahesabOnlyList.value.map((c) => {
+    let changed = false
+    const next = tahesabOnlyList.value.map((c) => {
       const m = mandes[String(c.code)]
       if (!m) return c
-      return { ...c, gold: m.gold, cash: m.cash }
+      changed = true
+      return { ...c, gold: m.gold ?? 0, cash: m.cash ?? 0 }
     })
-  } catch { /* ستون مانده اختیاری است */ }
+    if (changed) tahesabOnlyList.value = next
+  } catch {
+    need.forEach(c => mandeFetched.delete(c.code))
+  } finally {
+    if (mandeInFlightKey === key) mandeInFlightKey = ''
+  }
 }
 
-watch(pagedTahesab, () => { enrichPageMande() })
+watch([tahesabPage, tahesabSearch], () => { void enrichPageMande() })
 
 // با پیشرفت عملیات سراسری، ردیف‌های وارد شده را همین‌جا هم تیک بزن
 watch(() => importStore.doneCodes.length, () => {