feat(manager): auto-provision WhatsApp Bridge on demo create/destroy

- Add POS_INTERNAL_URL config for cross-VM API calls
- create_demo now calls POS /internal/whatsapp-bridge after tenant creation
- delete_tenant now destroys bridge container before dropping DB
- Graceful fallback if bridge provisioning fails

manager/services/tenant_service.py

@@ -153,6 +153,31 @@ def create_demo(name, email, demo_days=None, subdomain=None, pin="0000"):
     cur.close()
     conn.close()
 
+    # Auto-provision WhatsApp Bridge
+    try:
+        import urllib.request
+        import json as _json
+        from config import POS_INTERNAL_URL, INTERNAL_API_KEY
+        bridge_payload = _json.dumps({
+            "tenant_id": tenant_id,
+            "subdomain": subdomain,
+            "db_name": result["db_name"]
+        }).encode()
+        req = urllib.request.Request(
+            f"{POS_INTERNAL_URL}/pos/api/internal/whatsapp-bridge",
+            data=bridge_payload,
+            headers={
+                "Content-Type": "application/json",
+                "X-Internal-Key": INTERNAL_API_KEY
+            },
+            method="POST"
+        )
+        with urllib.request.urlopen(req, timeout=30) as resp:
+            bridge_data = _json.loads(resp.read().decode())
+            result["whatsapp_bridge"] = bridge_data
+    except Exception as e:
+        result["whatsapp_bridge_error"] = str(e)
+
     result["demo_days"] = days
     result["expires_at"] = str(datetime.now() + timedelta(days=days))
     result["access_url"] = f"https://{subdomain}.nexusautoparts.com.mx/pos/login"
@@ -221,6 +246,26 @@ def delete_tenant(tenant_id):
     if not tenant:
         raise ValueError("Tenant not found")
     db_name = tenant["db_name"]
+    subdomain = tenant.get("subdomain") or f"tenant-{tenant_id}"
+
+    # Destroy WhatsApp Bridge container
+    try:
+        import urllib.request
+        import json as _json
+        from config import POS_INTERNAL_URL, INTERNAL_API_KEY
+        bridge_payload = _json.dumps({"subdomain": subdomain}).encode()
+        req = urllib.request.Request(
+            f"{POS_INTERNAL_URL}/pos/api/internal/whatsapp-bridge",
+            data=bridge_payload,
+            headers={
+                "Content-Type": "application/json",
+                "X-Internal-Key": INTERNAL_API_KEY
+            },
+            method="DELETE"
+        )
+        urllib.request.urlopen(req, timeout=15)
+    except Exception:
+        pass  # Bridge may not exist
 
     conn = get_master_conn()
     cur = conn.cursor()