Merge release/delivery (IAM single sign-on) into the triage work

Brings the four release/delivery commits (IAM SSO for the admin panel,
both apps and the API; IAM env in docker-compose) onto fix/issues-triage.

Conflicts:
- customer-auth.service.ts imports: both kept.
- both apps' api/client.ts: both kept (AccountingBalance/WageQuote, and
  iamAppUrl).
- all build output (admin-panel, user-app, user-app-v2 dist, and the api
  release bundle): rebuilt from the merged source instead of picking a
  side.

Fixed while verifying:
- The IAM change calls iam.browserBootstrapUrl after every login, but
  the identity-service stand-ins in three test files lacked it. 15 tests
  failed on release/delivery itself.
- SMS relay: SMS_RELAY_PLATFORM was read but never sent, so the gateway
  never got `platform` (documented body: phone, host, text, platform).
  relayConfig() now returns it ("default" → null) and the request carries
  it. sms.service.spec now passes.

All 249 API tests pass; the three front-ends type-check and build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/admin-panel/src/views/auth/IamCallback.vue

@@ -0,0 +1,37 @@
+<script setup lang="ts">
+import { onMounted } from 'vue';
+import { useRouter } from 'vue-router';
+import api from '../../api/client';
+import { useAuthStore } from '../../stores/auth';
+
+const router = useRouter();
+const auth = useAuthStore();
+
+onMounted(async () => {
+  const params = new URLSearchParams(window.location.search);
+  sessionStorage.setItem('gb_admin_iam_sso_checked', '1');
+
+  if (params.get('error') || !params.get('code') || !params.get('state')) {
+    await router.replace('/auth/login');
+    return;
+  }
+
+  try {
+    const { data } = await api.post('admin/auth/sso/callback', {
+      code: params.get('code'),
+      state: params.get('state'),
+    });
+    const persisted = { ...data };
+    delete persisted.roles;
+    delete persisted.ut;
+    auth.inject(persisted);
+    await router.replace('/dashboard/ecommerce');
+  } catch {
+    await router.replace('/auth/login');
+  }
+});
+</script>
+
+<template>
+  <div style="min-height: 100vh; display: grid; place-items: center">در حال ورود...</div>
+</template>