refactor: simplify new topic shortcut logic in Inputbar

- Removed loading check in the new topic shortcut to streamline the process of adding a new topic and focusing the textarea.

src/renderer/src/pages/home/Inputbar/Inputbar.tsx

@@ -518,11 +518,9 @@ const Inputbar: FC<Props> = ({ assistant: _assistant, setActiveTopic, topic }) =
   }, [isDragging, handleDrag, handleDragEnd])
 
   useShortcut('new_topic', () => {
-    if (!loading) {
-      addNewTopic()
-      EventEmitter.emit(EVENT_NAMES.SHOW_TOPIC_SIDEBAR)
-      textareaRef.current?.focus()
-    }
+    addNewTopic()
+    EventEmitter.emit(EVENT_NAMES.SHOW_TOPIC_SIDEBAR)
+    textareaRef.current?.focus()
   })
 
   useShortcut('clear_topic', () => {