fix: prevent previous prompt name and content from displaying when adding new prompt

frontend/src/settings/Prompts.tsx

@@ -58,7 +58,8 @@ export default function Prompts({
       }
       setModalState('INACTIVE');
       onSelectPrompt(newPromptName, newPrompt.id, newPromptContent);
-      setNewPromptName(newPromptName);
+      setNewPromptName('');
+      setNewPromptContent('');
     } catch (error) {
       console.error(error);
     }