fix: enhance OpenAI service tier handling and initialize settings during migration

- Updated getServiceTier method to ensure proper handling of undefined OpenAI models.
- Added initialization for OpenAI settings in the migration process to set default values if not present.

src/renderer/src/providers/AiProvider/OpenAIResponseProvider.ts

@@ -179,11 +179,14 @@ export abstract class BaseOpenAIProvider extends BaseProvider {
   }
 
   protected getServiceTier(model: Model) {
-    if (!isOpenAIModel(model)) return undefined
+    if (!isOpenAIModel(model)) {
+      return undefined
+    }
+
     const openAI = getStoreSetting('openAI') as any
     let serviceTier = 'auto' as OpenAIServiceTier
 
-    if (openAI.serviceTier === 'flex') {
+    if (openAI && openAI?.serviceTier === 'flex') {
       if (isSupportedFlexServiceTier(model)) {
         serviceTier = 'flex'
       } else {

src/renderer/src/store/migrate.ts

@@ -1426,6 +1426,12 @@ const migrateConfig = {
     try {
       state.settings.notification = settingsInitialState.notification
       addMiniApp(state, 'google')
+      if (!state.settings.openAI) {
+        state.settings.openAI = {
+          summaryText: 'off',
+          serviceTier: 'auto'
+        }
+      }
       return state
     } catch (error) {
       return state