fix: preserve standalone provider reasoning fields

Author: Soulter

dashboard/src/composables/useProviderModelConfigDialog.ts

@@ -59,7 +59,9 @@ export function useProviderModelConfigDialog(options: UseProviderModelConfigDial
 
   function openProviderEdit(provider: any) {
     const editableProvider = JSON.parse(JSON.stringify(provider))
-    delete editableProvider.reasoning
+    if (editableProvider.provider_source_id) {
+      delete editableProvider.reasoning
+    }
     providerEditData.value = editableProvider
     providerEditOriginalId.value = provider.id
     providerEditMode.value = 'edit'
@@ -89,7 +91,6 @@ export function useProviderModelConfigDialog(options: UseProviderModelConfigDial
   async function saveEditedProvider() {
     if (!providerEditData.value) return
 
-    delete providerEditData.value.reasoning
     savingProviders.value.push(providerEditData.value.id)
     try {
       const isAdding = providerEditMode.value === 'add'