Trim needless comments and fix the picker width

Remove comments that only restate the code, keeping the section banners
and the notes that carry a reason, a measured fact or an external
contract.

ButtonOptions.width claimed to be a fixed width but only set minWidth,
so the Graph and Texture pickers grew with the name they showed. It is
now what it promises, with a separate minWidth for the buttons that have
two forms. Narrow buttons shrink their padding, otherwise a 24px icon
button had 8px left for its glyph and truncate dropped it entirely.

__gm.labelsDropped() guards that class: the overflow guard only saw text
that was too wide, never a label truncated to nothing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/core/properties/textureRef.ts

@@ -2,31 +2,22 @@ import type { TextureAsset, TextureFrame } from '../model/Asset';
 import { findAsset, type Project } from '../model/Project';
 import { findFrame } from '../model/texture';
 
-/** Shown for a `texture` property that references nothing. */
 export const NO_TEXTURE_LABEL = 'None';
 
-/** Separates a texture's name from a frame's name wherever the two are shown together. */
 const FRAME_SEPARATOR = ' / ';
 
-/** One thing a sprite's `texture` property can be set to. */
 export interface TextureChoice {
   /** Asset id for the whole picture, frame id for one cut-out of it. */
   id: string;
   label: string;
-  /** The texture this choice belongs to – frames of one sheet stay together in the menu. */
   asset: TextureAsset;
   /** Null for the whole-picture entry. */
   frame: TextureFrame | null;
 }
 
 /**
- * How a texture reference reads wherever it is displayed: the texture's name for a whole
- * picture, "Sheet / Frame" for a frame, "None" for the empty id, and `<id>?` when the id no
- * longer resolves.
- *
- * A dangling reference keeps showing its id instead of falling back to "None": the id is the
- * only trace left of what was meant, and blanking it would make a deleted frame look like a
- * field that was never filled in. `project` may be null while a view has no project yet.
+ * The texture's name, "Sheet / Frame" for a frame, "None" for the empty id, `<id>?` when it no
+ * longer resolves – a dangling reference shows its id rather than passing for an empty field.
  */
 export function textureRefLabel(project: Project | null, id: string): string {
   if (id === '') return NO_TEXTURE_LABEL;
@@ -38,16 +29,9 @@ export function textureRefLabel(project: Project | null, id: string): string {
 }
 
 /**
- * Everything a sprite may wear, in menu order: each texture followed by its own frames.
- *
- * The whole picture stays on offer next to the frames rather than being replaced by them.
- * A texture that was never sliced has no frames at all, and a sheet's full image is
- * occasionally what you want (a background, a check of the sheet itself) – forcing a frame
- * would mean slicing every single-image texture into one pointless frame.
- *
- * Textures are sorted by name so the order does not depend on upload time; frames keep the
- * order they were created in, which for a sliced sheet is reading order and therefore the
- * order the animation runs in.
+ * Everything a sprite may wear, in menu order: each texture followed by its own frames. Textures
+ * are sorted by name so the order does not depend on upload time; frames keep creation order,
+ * which for a sliced sheet is reading order.
  */
 export function textureRefChoices(project: Project): TextureChoice[] {
   const textures = project.assets