feat(default): reorganize system settings pricing UI

Refine the default system settings structure and model pricing editor so pricing configuration is easier to scan and edit.

web/default/src/features/system-settings/models/index.tsx

@@ -43,6 +43,13 @@ const defaultModelSettings: ModelSettings = {
   AutoGroups: '',
   DefaultUseAutoGroup: false,
   'group_ratio_setting.group_special_usable_group': '{}',
+  'channel_affinity_setting.enabled': false,
+  'channel_affinity_setting.switch_on_success': true,
+  'channel_affinity_setting.max_entries': 100000,
+  'channel_affinity_setting.default_ttl_seconds': 3600,
+  'channel_affinity_setting.rules': '[]',
+  'model_deployment.ionet.api_key': '',
+  'model_deployment.ionet.enabled': false,
 }
 
 export function ModelSettings() {