- Open an interactive staging dialog for `git add -i`, `git stage -i`, and
`git add --interactive`, allowing paths to be selected before staging.
- Open an interactive rebase dialog for `git rebase -i` / `--interactive`, with
pick, squash, drop, commit-message editing, and reorder controls.
- Keep the existing synthetic runtime behavior available for direct engine/test calls,
while making app-entered interactive commands show real UI instead of auto-staging.
- Center manpage search navigation using actual text-layout highlight bounds instead
of approximate line and column math.
- Make editor dialogs use a full-screen IME-padded outer scroll container so controls
remain reachable when the keyboard pans or resizes the dialog.
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