feat: add treasury audit, attachment download, and installment SMS

Let cheque clearance pick a cash account and export income, expense, and installment lists to Excel.

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

apps/web/src/views/treasury/TreasuryReceivablesView.vue

@@ -51,6 +51,16 @@ async function load() {
   accounts.value = acc.data.filter((row) => row.isActive);
 }
 
+async function downloadExcel() {
+  const { data } = await api.get<Blob>('/treasury/receivables/export', { responseType: 'blob' });
+  const url = URL.createObjectURL(data);
+  const link = document.createElement('a');
+  link.href = url;
+  link.download = 'installments.xlsx';
+  link.click();
+  URL.revokeObjectURL(url);
+}
+
 async function createContract() {
   saving.value = true;
   error.value = '';
@@ -148,6 +158,7 @@ onMounted(() => {
         <UiButton variant="secondary" @click="customLines.push({ amount: '', dueDate: '' })">قسط دیگر</UiButton>
       </div>
       <UiButton :loading="saving" @click="createContract">ساخت اقساط</UiButton>
+      <UiButton variant="secondary" @click="downloadExcel">خروجی اکسل</UiButton>
     </UiCard>
 
     <article v-for="row in rows" :key="row.id" class="contract">