Chat: rename the 'OpenAI o1' model to 'OpenAI o1-preview

fix: update model selection to only allow available models
- Only update the model ID if the new model is available to the user
- Rename the 'OpenAI o1' model to 'OpenAI o1-preview' to better indicate it is a preview model

lib/shared/src/models/dotcom.ts

@@ -74,7 +74,7 @@ export const DEFAULT_DOT_COM_MODELS = [
     // Preview / Early Access
     // --------------------------------
     {
-        title: 'OpenAI o1',
+        title: 'OpenAI o1-preview',
         id: 'openai/cody-chat-preview-001',
         provider: 'OpenAI',
         usage: [ModelUsage.Chat, ModelUsage.Edit],

vscode/src/chat/chat-view/ChatModel.ts

@@ -30,8 +30,11 @@ export class ChatModel {
     }
 
     public updateModel(newModelID: string) {
-        this.modelID = newModelID
-        this.contextWindow = modelsService.instance!.getContextWindowByID(this.modelID)
+        // Only update the model if it is available to the user.
+        if (modelsService.instance!.isModelAvailable(newModelID)) {
+            this.modelID = newModelID
+            this.contextWindow = modelsService.instance!.getContextWindowByID(this.modelID)
+        }
     }
 
     public isEmpty(): boolean {