[FEATURE]: Click to rename session in TUI sidebar

[maharshi365]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Currently, you have to use /rename to do it, sometimes you're in the middle of prompting. This is just another way to enable renaming.

[github-actions]

This issue might be related to existing issues. Please check:

• Feature Request: Rename Session Title #1389: Feature Request: Rename Session Title - General session renaming feature
• Session rename dialog: auto-select text or start empty for faster renaming #6153: Session rename dialog improvements - Related to improving the rename workflow

Feel free to ignore if these don't apply to your specific use case.