Add hina_invitation to built-in templates with NO body parameters (static body) and fix test endpoint

backend/main.py

@@ -81,9 +81,9 @@ def _fix_template_parameters():
         
         if template:
             # Expected correct parameters for hina_invitation
-            # Body {{1}} = contact_name (guest's name)
+            # hina_invitation has NO body parameters (body is static in Meta)
-            # Button {{1}} = event_id (sent as separate button parameter)
+            # Only has button parameter: event_id
-            expected_params = ["contact_name"]
+            expected_params = []
             
             try:
                 current_params = json.loads(template.body_params)
@@ -2001,13 +2001,12 @@ async def test_whatsapp_send(
         
         service = get_whatsapp_service(db)
         
-        # Send with minimal parameters - just for testing
+        # hina_invitation template has no body parameters - only button parameter
         params = {
-            "contact_name": "Test",
             "event_id": "test-event-123"
         }
         
-        # Use hina_invitation template (only requires contact_name and event_id)
+        # Use hina_invitation template (static body, dynamic button URL)
         template_key = "hina_invitation"
         
         result = await service.send_by_template_key(

backend/whatsapp_templates.py

@@ -240,6 +240,26 @@ TEMPLATES: Dict[str, Dict[str, Any]] = {
             "guest_link":   "https://invy.dvirlabs.com/guest",
         },
     },
+
+    # ── hina_invitation ────────────────────────────────────────────────────────
+    # Special event template with static body text and dynamic button URL
+    # No body parameters - body text is defined in Meta template
+    # Button {{1}} = event_id (dynamic URL parameter)
+    "hina_invitation": {
+        "meta_name": "hina_invitation",
+        "language_code": "he",
+        "friendly_name": "הזמנה לחינה",
+        "description": "הזמנה לאירוע חינה עם קישור דינמי",
+        "header_params": [],
+        "body_params": [],
+        "button_type": "URL",
+        "button_text": "הצבע על הזמנה",
+        "button_url": "https://invy.dvirlabs.com/guest/{{1}}",
+        "button_param_key": "event_id",
+        "fallbacks": {
+            "event_id": "event-id",
+        },
+    },
 }