Share the parts the sound devices and timelines repeated (#85)

Round 12 of the clean-up. Duplicate code had grown from 33 clones
(249 lines) after round 11 to 140 clones (1263 lines), almost all of
it in the panels and faces of the sound FX devices (#379 to #401).
It is down to 57 clones (416 lines) now, and src is 816 lines
shorter.

- deviceParts.ts holds what the device panels built by hand: the
  head, rows of knobs, the screen style and the row layout for
  groups of knobs. Twelve panels use it. panel.knobs stays because
  the debug hooks read it.
- DeviceFace is the base of the twelve faces. It finds the node and
  does wired, preview, commit, set, hide, reload and audition.
  compressorWired lives there as paramWired.
- TextPool replaces ten copies of "make texts as needed, hide the
  rest" in the wave and video tabs, the rulers, the piano roll and
  the song and composition timelines. clipStrip.ts is the clip label
  strip the wave and video tabs share.
- core/util/bytes.ts has the concat that ogg, matroska and avcColour
  each wrote out.
- Dead code is gone: clear on the video players (never called since
  #402), posterFileOf and videoTimeAt (only tests called them) and
  easeOut (the same as glide(t, 3)). Values only used in their own
  file lose their export.
- Comments over 125 columns are wrapped, and comments that told the
  history ("as before", "used to") say what is, in src and in the
  e2e modules.
- Left alone on purpose: AnimationEditor and CompositionEditor share
  only the play button, and the curve panels are built differently.
- Chip now places its boxes through put, which rounds. They were
  whole numbers already. The three row layouts are byte-identical
  before and after.
- README lists the video and composition assets and the Videos and
  Compositions pages.

Tests:
- Gate (melektaus-atx): CHECK EXIT 0, 313 files, 4835 tests.
- e2e 25, 34, 64, 65, 66, 69 (melektaus-atx): ALL PASSED, 330 checks.
- TextPool without keeping its texts and framesToRoom without making
  room both go red.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -19,7 +19,7 @@ way in.
 - An **asset** is a named, typed thing (scene, camera, sprite, text, behavior, variables, struct,
   collider, rigidbody, joint, container, clip area, texture, vector art, pixel art, palette,
   animation, curve, tile, tilemap, state machine, shader, shader function, font, sound, sound FX,
-  instrument, pattern, song, bus, particles) with properties and no position.
+  instrument, pattern, song, bus, video, composition, particles) with properties and no position.
 - A **scene object** places an asset: position, sparse **overrides** of its properties, an optional
   parent. Only what differs from the asset is stored; the inspector paints it gold and offers ↺ / ↑.
 - A **container** is a reusable group edited once and placed many times; its content is resolved
@@ -79,12 +79,14 @@ CI. Details, the GPU requirement and the detached runner are in
 | [Instruments](https://git.nockal.com/meleki/feuerwerk/wiki/Instruments) | Instruments as node graphs, Chips and presets, the keys of the Instrument tab, `Play note` |
 | [Patterns](https://git.nockal.com/meleki/feuerwerk/wiki/Patterns) | Patterns and the piano roll, playing one in a loop or from a game |
 | [Songs](https://git.nockal.com/meleki/feuerwerk/wiki/Songs) | Songs, their tracks and items, routing, recording, playing one from a game |
+| [Videos](https://git.nockal.com/meleki/feuerwerk/wiki/Videos) | Video assets and clips, wearing one on a sprite, recording the game view or the editor |
 | [Animations](https://git.nockal.com/meleki/feuerwerk/wiki/Animations) | Animation assets and the Animation tab |
 | [Curves](https://git.nockal.com/meleki/feuerwerk/wiki/Curves) | Easings drawn by hand, the Curve tab, using one on a key or a `Lerp` |
 | [Shaders](https://git.nockal.com/meleki/feuerwerk/wiki/Shaders) | Shader graphs that sprites, texts, particle fields and cameras wear, their node set, passes, shader functions |
 | [Particles](https://git.nockal.com/meleki/feuerwerk/wiki/Particles) | Particle graphs: a particle as a function of its age |
 | [State machines](https://git.nockal.com/meleki/feuerwerk/wiki/State-machines) | The asset, named transitions, `State branch`, `Set state` and `State transition` |
 | [Containers](https://git.nockal.com/meleki/feuerwerk/wiki/Containers) | Templates, instances, screens |
+| [Compositions](https://git.nockal.com/meleki/feuerwerk/wiki/Compositions) | Objects, videos and sounds laid out in time, the Composition tab, playing one in a game |
 | [Tiles](https://git.nockal.com/meleki/feuerwerk/wiki/Tiles) | The tile asset, plain tiles and the two autotile kinds, the pictures as animation steps, the Tile tab |
 | [Tilemaps](https://git.nockal.com/meleki/feuerwerk/wiki/Tilemaps) | The tilemap asset, painting in the scene view, layers, what it looks like in the game |
 | [Plugins](https://git.nockal.com/meleki/feuerwerk/wiki/Plugins) | Extending the editor: the plugin file, how it is loaded, switching one on and off, API v1 |