Fix new_session.ui: remove custom toolbar and use params instead of data in urlwidget

wwwroot/new_session.ui

@@ -43,30 +43,7 @@
             "height": "100px",
             "marginBottom": "24px"
           }
-        ],
-        "toolbar": {
-          "tools": [
-            {
-              "label": "Create Session",
-              "bgcolor": "#22C55E",
-              "color": "#FFFFFF",
-              "border": "none",
-              "borderRadius": "6px",
-              "padding": "10px 20px",
-              "fontWeight": "600",
-              "action": "submit"
-            },
-            {
-              "label": "Cancel",
-              "bgcolor": "#64748B",
-              "color": "#FFFFFF", 
-              "border": "none",
-              "borderRadius": "6px",
-              "padding": "10px 20px",
-              "action": "cancel"
-            }
         ]
-        }
       },
       "binds": [
         {
@@ -77,7 +54,7 @@
           "options": {
             "url": "{{entire_url('hermes-web-cli/sessions/create_session.dspy')}}",
             "method": "POST",
-            "data": "{{ 'new-session-form'.data }}"
+            "params": "{{ 'new-session-form'.data }}"
           },
           "mode": "replace"
         },