[FEATURE]: need shortcut support for focus the chat input

[ChangeHow]

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

Due to a hand injury, I’m trying to minimize mouse usage and use the keyboard to focus on input fields, similar to how I use Command + L to jump to the address bar.

[github-actions]

For keybind-related issues, please also check our pinned keybinds documentation: #4997

[ChangeHow]

solved #12493