Fix 3D drum/keys highways not resizing on fullscreen under splitscreen (#723)

The guitar/bass highway_3d renderer self-detects panel-canvas size changes
in its draw() loop and re-runs applySize() every frame, because the
splitscreen host overrides hw.resize and never calls renderer.resize().
The drum and keys highways lacked that fallback — they only re-framed when
the host explicitly called resize(w, h) — so their panels stayed framed for
the pre-fullscreen size while the guitar/bass panels adapted. Symptom: a
too-small, off-center highway in the drum/keys panels after maximizing a
split-screen session.

Port highway_3d's per-frame drift check into both draw() loops: re-apply on
backing-store change (canvas.width/height) AND on CSS-box drift
(clientWidth/clientHeight vs the last applied logical size, throttled to
every 10th frame). Track _lastHwW/_lastHwH + _appliedW/_appliedH per
instance and reset them in destroy() so a reused instance re-frames on the
next song.

plugins/drum_highway_3d -> 0.3.1, plugins/keys_highway_3d -> 0.1.1.
Tests: tests/js/drum_keys_highway_3d_resize_reframe.test.js.

Signed-off-by: Kris Anderson <topkoa@gmail.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/keys_highway_3d/plugin.json

@@ -1,7 +1,7 @@
 {
   "id": "keys_highway_3d",
   "name": "Keys Highway 3D",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "RS+-style 3D falling-note piano highway fed by the Sloppak Notation Format, with Web MIDI input scoring.",
   "type": "visualization",
   "bundled": true,