Show conversation title when in the conversation view

### Describe the feature or problem you'd like to solve

I want to see what conversation I'm looking at in the CLI without going to /session to view it

### Proposed solution

Either at the top here or the bottom, I'd like to see the name of the conversation. It would be very helpful to context switch between simultaneous conversations

(left side with branch/path redacted)

### Example prompts or workflows

Running simultaneous conversations, whether within one terminal or multiple. It is hard to tell what the active conversation is about without typing /session to see the name.

### Additional context

This could also be a good opportunity to augment the terminal title so I see "Copilot" instead of just "zsh"

从 CLI 对话视图开始，并将其与 /session 视图进行比较，后者目前会显示对话名称。确定活动对话在哪个位置进行渲染，以及终端标题是否属于同一个入口点。完成的标准是：在查看活动对话时能够识别它，并且任何终端标题变更都与选定的范围一致。

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