Add Tahesab jewelry accounting integration with multi-DB connections.

Encrypt tokens server-side, sync customers both ways, show balances/documents on the person Assets tab, and push sanads with idempotent Factor_Code logging.

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

apps/web/src/layouts/AppLayout.vue

@@ -42,6 +42,7 @@ const settingsPaths = [
   '/settings/custom-fields',
   '/settings/products',
   '/settings/currencies',
+  '/settings/tahesab',
   '/settings/faq',
 ];
 
@@ -327,6 +328,7 @@ onUnmounted(() => {
             <RouterLink to="/settings/lead-forms" @click="closeMenu">فرم‌ساز سرنخ</RouterLink>
             <RouterLink to="/settings/custom-fields" @click="closeMenu">فیلدهای سفارشی</RouterLink>
             <RouterLink to="/settings/currencies" @click="closeMenu">ارزها</RouterLink>
+            <RouterLink to="/settings/tahesab" @click="closeMenu">ته‌حساب</RouterLink>
             <RouterLink to="/settings/faq" @click="closeMenu">FAQ</RouterLink>
           </div>
         </div>