feat: accounting integration (D27), SMS relay driver (D26), rebuild user apps

- Add Tahesab/Zarrin accounting sync module with admin panel UI
- Add SMS relay driver as default provider, refactor SMS into driver pattern
- Update customer services, orders, products, and catalog queries
- Rebuild user-app and user-app-v2 dist assets
- Add Prisma migration for accounting tables
- Update docker-compose and env examples
- Update parity docs (DECISIONS, ISSUES, PROGRESS)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/src/modules/accounting-sync/accounting-quick.controller.ts

@@ -0,0 +1,48 @@
+import { Controller, Get, HttpCode, Post } from '@nestjs/common';
+import { CurrentCustomer, CustomerAuth } from '../customer-auth/customer.guards';
+import type { AuthenticatedCustomer } from '../customer-auth/customer-jwt.strategy';
+import { RequirePermission } from '../auth/guards';
+import { AccountingAdminService } from './accounting-admin.service';
+import { AccountingSyncService } from './accounting-sync.service';
+
+/**
+ * D27, plan §12 — sync where people work, on top of the «اتصال حسابداری»
+ * screen: a button on the wholesale-customer list and on the product list,
+ * and the customer's own balance read live each time the app's profile opens.
+ * Each is behind the permission of the screen it sits on, and works whenever a
+ * provider is connected, whatever the feature switches say (owner's ruling).
+ */
+@Controller()
+export class AccountingQuickController {
+  constructor(
+    private readonly admin: AccountingAdminService,
+    private readonly sync: AccountingSyncService,
+  ) {}
+
+  /** Whether to show the sync buttons. Any signed-in admin; reveals no settings. */
+  @Get('admin/accounting-status')
+  status() {
+    return this.admin.connectionStatus();
+  }
+
+  @Post('admin/customers-omde/accounting-sync')
+  @HttpCode(200)
+  @RequirePermission('persons.list.client.omde')
+  syncCustomers() {
+    return this.admin.syncNow(['customers', 'balances']);
+  }
+
+  @Post('admin/products/accounting-sync')
+  @HttpCode(200)
+  @RequirePermission('product.list')
+  syncProducts() {
+    return this.admin.syncNow(['products']);
+  }
+
+  /** The app's profile: this customer's balance, read from the software now. */
+  @CustomerAuth()
+  @Get('customer/me/accounting-balance')
+  myBalance(@CurrentCustomer() me: AuthenticatedCustomer) {
+    return this.sync.customerBalanceLive(me.id);
+  }
+}