feat: 希望增加记忆可视化

### 使用场景 / Use case

能够直观的查看自己软件的记忆记录和修改删除

### 当前问题 / Current limitation

当前也不知道有没有记多少记忆。另外，CodeX和Claude Code以及PI不懂这三个记忆的区别。感觉PI的记忆是没有记忆，就是压缩上下文。

### 期望方案 / Proposed solution

像rikkahub或者liveagent那样可以看记忆

### 已考虑的替代方案 / Alternatives considered

友商软件有类似的rikkahub或者liveagent或者zcode

No files or tests are named. Start by locating how the agent currently records and distinguishes memories, then review the existing UI structure and the referenced Rikkahub or LiveAgent examples. Done should provide a way to inspect stored memories and modify or delete them, with the different memory behaviors clearly represented.

Written by the indexing model from the issue text.