Improve discoverability of the integrated terminal #962

Problem

The integrated terminal exists, but it is hard to discover from the UI.

I found it only after checking the repository documentation, where KEYBINDINGS.md documents terminal.toggle on mod+j along with other terminal actions such as terminal.new, terminal.split, and terminal.close.

From a user perspective, this makes the terminal feel hidden behind a keyboard shortcut rather than exposed as a first-class feature. If there is already a visual entry point somewhere in the UI, it is not discoverable enough.

Why this matters

A built-in terminal is an important capability. When it is only discoverable through documentation or shortcuts, new users can easily assume the app does not have one at all.

Suggested improvements

• Add a visible menu entry such as View -> Toggle Terminal
• Add a toolbar or sidebar button for opening the terminal
• Surface Toggle Terminal more prominently in the command palette or onboarding
• Consider showing the shortcut in the UI once the feature is discovered

Reference

KEYBINDINGS.md currently documents mod+j for terminal.toggle.