- `InputKey` — hashable variant covering chars-with-modifiers, specials, and
mouse events (kind + tagged region). `canonical()`/`parse()` round-trip the
TOML form (`ctrl-w h`, `mouse:click(pane)`).
- `canonicalise()` — `crossterm::Event` → `InputKey`, with a region-resolver
callback supplied by the renderer (NAP-280 will wire `RegionMap` to it).
- `ChordState` — small state machine that holds a key when it strictly
prefixes a known binding, resolves otherwise. Drops stale held keys past
`timeout`.
11 unit tests passing.
naps62-yolo
67870bb9e8