Agent Merge UI Improvement Suggestions

Agent Merge UI Improvement Suggestions

After enabling 'Agent Merge', I often want to _only_ have 'Merge pull request' checked with the others unchecked. Trying to uncheck the other items first ends up disabling 'Agent Merge' as soon as the last item is unchecked. In order to turn on 'Merge pull request' only, you have to check it first, and then uncheck the other items.

It's also disconcerting that when I enable 'Agent merge' those other items are checked by default. Will I turn them off fast enough before it starts to take action?

I recommend:
1. Have an 'Apply' button to apply the agent merge options
2. Do not functionally enable agent merge until the user has turned it on, selected which features they want enabled, and clicked Apply
3. Ensure the UI allows me to turn off all items and then turn one on without dismissing the popup

---
| Field | Value |
| --- | --- |
| App version | 1.1.3 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 3 |

从 /chat 入口进入 Agent Merge 选项弹窗，重现取消勾选所有选项，然后仅选择“Merge pull request.”的操作序列。完成条件是弹窗支持选择选项，同时不会关闭弹窗或过早激活 agent，并且由 Apply 操作提交选择；issue 中未指定任何文件或测试。

由索引模型根据 Issue 内容生成。