fix: support enter as the accept suggestion binding

[Caner Patır (CanerPatir)]

Problem

Binding acceptSuggestion to return in the config does not work as expected:

[bindings.acceptSuggestion]
key = "return"

Accepting a suggestion with enter (e.g. git chec → checkout) inserts it, but no further suggestions are shown for the rest of the line (branches never appear after git checkout ). With tab, the same flow works.

SuggestionManager.update() calls term.clearCommand() on every enter before evaluating bindings, so the tracked command is reset even when enter is consumed as the accept key.

Fix

• Clear the command on enter only when the key press was not handled by a binding.
• When enter is the accept key and the active token is empty, let enter run the command unless a suggestion was explicitly selected with the navigation keys. Without this, a completed line (git checkout feature-x ) can't be executed with enter, because the next-argument suggestions are always visible.

Behavior with the default tab binding is unchanged.

Testing

• Added unit tests in src/tests/utils/suggestionManager.test.ts covering accept-on-enter, enter not consumed by a binding, enter on an empty token, and enter after navigating. The accept-on-enter test fails without the fix.
• npm test and lint pass.
• Manually verified in zsh with enter bound to accept: git chec ⏎ → git checkout with branch suggestions, f ↓ ⏎ → git checkout feature-beta, ⏎ → command runs.