fix(app): restore v2 agent selector

Author: anduimagui

packages/app/src/components/prompt-input-v2.tsx

@@ -475,7 +475,7 @@ export function usePromptInputV2Controller(props: PromptInputV2ControllerProps):
     view: {
       placeholder: designPlaceholder,
       agent:
-        props.controls.agents.visible && props.controls.agents.options.length > 0
+        props.controls.agents.options.length > 0
           ? {
               options: () => props.controls.agents.options.map((name) => ({ id: name, label: name })),
               current: () => props.controls.agents.current,