Ctrl-G interrupt handler. First handler in the input stack.

Intercepts Ctrl-G (codepoint 7) and resets the editor to a known-good state. This is Minga's equivalent of Emacs's C-g: it cancels whatever is in progress and returns the user to normal mode in the editor scope.

Sits before every other handler (including ConflictPrompt) so it works even when a modal overlay is swallowing all input. This is the last resort for focus confusion freezes where the editor is running but keys go to the wrong place.

What gets reset

• keymap_scope → :editor
• Vim mode → :normal with fresh mode state
• Picker → closed
• Which-key popup → dismissed
• Conflict prompt → dismissed
• Completion menu → closed
• Status message → cleared
• Agent pending prefix → cleared

A *Messages* log entry records what was reset for debuggability.