Refactor round: ship web/index.html, drop the remote browser, fix stale comments and README

- `.gitignore` said `index.html` unanchored, which also caught the Vite source page;
  a fresh clone could neither `dev` nor `build`. Anchored to `/index.html`, page added.
- Removed GM_REMOTE (tools/remote/gm-browser.ps1 and the ssh/scp branch in browser.mjs):
  the Windows test machine is gone and the only flaky check that lived on it is closed (#37).
- Removed `npm run preview`, undocumented and unused.
- Comments: wrong number in collider.test.ts (250 → 200), the "declarations used to…"
  history in listItems.ts and friends, the 24 px/28 contradiction, section banners in
  nodes/index.ts, node-catalog.test.ts and api/index.php, name paraphrases, and the stale
  step numbers in tools/e2e/11-…23- from the old global count.
- README: asset types include `animation`, kind order Number/Text/Boolean, tagged colour
  and texture items, 6/5 kinds, the `Texture` node, `./build.sh`, PROJECT_FORMAT_VERSION,
  and the file tree (kinds.ts, listItems.ts, propertyPorts.ts, Breadcrumb.ts, beads.ts,
  tools/assets/).
- tests/helpers.ts takes the duplicated `findObject` and `sceneWithCamera`.

Proof: ./check.sh 797 tests, full e2e ALL PASSED 633 checks against this bundle.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/core/properties/camera.ts

@@ -3,7 +3,6 @@ import { defaultsFor } from './PropertySchema';
 
 const DEFAULTS = defaultsFor('camera');
 
-/** Axis-aligned rectangle in world units. */
 export interface WorldRect {
   left: number;
   top: number;

src/core/properties/collider.ts

@@ -17,7 +17,6 @@ type Circle = Extract<ColliderShape, { kind: 'circle' }>;
 /** A movement axis in the plane (`z` is draw order, not geometry). */
 export type PlaneAxis = 'x' | 'y';
 
-/** Centred on `centre`, a world position. */
 export function colliderShape(props: PropertyBag, centre: Vec2): ColliderShape {
   if (props.shape === 'circle')
     return {

src/core/properties/listItems.ts

@@ -3,8 +3,7 @@
  * value. JSON says what a number, a text, a boolean and a struct are; a tagged kind says so itself
  * (`tagOf`), which keeps every list ever stored readable.
  *
- * Depth is capped the way the declarations used to cap it: a struct item holds flat items, and so
- * does a list inside a struct field.
+ * Depth is capped: a struct item holds flat items, and so does a list inside a struct field.
  */
 import {
   type FieldValue,
@@ -75,7 +74,7 @@ export function listItemOf(value: PropertyValue | undefined): ListItem {
 
 /**
  * A flat position holds a primitive or a tagged item. Anything deeper is dropped rather than
- * flattened – the same bound the declarations used to draw, and the one the store writes.
+ * flattened – the bound the store writes.
  */
 export function flatItemOf(value: PropertyValue | undefined): FlatItem | undefined {
   if (isList(value) || (isStruct(value) && !isTaggedKind(tagOf(value) ?? ''))) return undefined;