Update to always create a tab from builder

Author: intitni

Core/Sources/ChatGPTChatTab/ChatGPTChatTab.swift

@@ -104,6 +104,10 @@ public class ChatGPTChatTab: ChatTab {
 
         return [Builder(title: "New Chat", customCommand: nil)] + customCommands
     }
+    
+    public static func defaultBuilder() -> ChatTabBuilder {
+        Builder(title: "New Chat", customCommand: nil)
+    }
 
     @MainActor
     public init(service: ChatService = .init(), store: StoreOf<ChatTabItem>) {

Core/Sources/Service/GUI/GraphicalUserInterfaceController.swift

@@ -388,12 +388,7 @@ extension ChatTabPool {
     ) async -> (any ChatTab, ChatTabInfo)? {
         let id = UUID().uuidString
         let info = ChatTabInfo(id: id, title: "")
-        guard let builder = kind?.builder else {
-            let chatTap = ChatGPTChatTab(store: createStore(id))
-            setTab(chatTap)
-            return (chatTap, info)
-        }
-
+        let builder = kind?.builder ?? ChatGPTChatTab.defaultBuilder()
         guard let chatTap = await builder.build(store: createStore(id)) else { return nil }
         setTab(chatTap)
         return (chatTap, info)