Let the scene view hide symbols, names and shapes per asset kind

The scene view gets crowded once a scene holds many behaviors,
colliders and tilemaps. A new eye button in the topbar opens a list of
all placeable asset kinds, and each row has toggles for what the scene
view draws for that kind.

- The popup lists all 9 placeable kinds from Behavior to Tilemap, with
  the columns Symbol, Name and Shape. It stays open while switching.
- Sprite, Text and Tilemap draw no symbol, so their symbol toggle is
  greyed out. Their name toggle shows a new centred name tag, which is
  off by default.
- Shape exists for Collider and Tilemap. A hidden collider outline is
  neither drawn nor clickable. A hidden tilemap shape removes the
  collision outlines and the paint tint, the tiles stay visible.
- A hidden symbol takes no slot in the ring and draws no dashed link to
  its parent. A name that stays on moves to the centre of the object.
- The setting lives in the project as `sceneVisibility`, not in
  localStorage. Older projects load with the defaults, which match the
  view as it was.
- Switching has no undo step, like the game scale. It only changes the
  view. A change made during Play survives Stop.
- The rules sit in `src/core/model/sceneVisibility.ts`, the popup in
  `src/editor/panels/SceneVisibilityPopup.ts`. Four new SVG icons.

Not covered by a check: symbol off with name on for a kind with a
symbol, Text and Tilemap with names, and the paint tint with shape off.

Tests:
- ./check.sh: 173 files, 2515 tests, CHECK EXIT 0
- e2e 46: ALL PASSED, 17 checks. 46g clicks the popup, lays a small
  tilemap over the crate and removes it again.
- e2e 8 alone on a fresh seed: ALL PASSED, 23 checks. A red check in
  the partial run 2,8,46 came from the module selection.
- 8 new unit tests in tests/editor/scene-visibility.test.ts.
- 4 counter-probes, each fails its test: load ignores the saved value,
  Play skips the saved model, scene view ignores collider shape, scene
  view ignores tilemap shape.

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

src/editor/debug/sceneHooks.ts

@@ -1,6 +1,7 @@
 import { findAssetOf, findObjectHolder } from '../../core/model/Project';
 import { resolveObjects } from '../../core/model/instance';
 import { findLayer, layerZ } from '../../core/model/tilemap';
+import { currentVisibilityPopup } from '../panels/SceneVisibilityPopup';
 import { currentTilemapWidgets, paintedLayerId, paintedTilemap } from '../panels/TilemapPanel';
 import type { TilemapTool } from '../state';
 import { rectOf } from '../textProbe';
@@ -65,6 +66,13 @@ export function sceneHooks({ state, editor }: HookContext) {
     sceneIcon: (id: string) => viewport.iconInfo(id),
     /** The names shown beside the symbols, each with the plate under it, in world units and on screen. */
     sceneLabels: () => viewport.labelInfo(),
+    /** A collider's outline in the Scene tab: hidden by the eye in the top bar, it is neither seen nor hit. */
+    sceneShape: (id: string) => viewport.shapeInfo(id),
+    /** The switches behind the eye while it stands open: per type and part, on, enabled, where to click. */
+    visibilityPopup: () =>
+      currentVisibilityPopup()
+        ?.info()
+        .map(({ widget, ...entry }) => ({ ...entry, ...centreOf(widget) })) ?? null,
     drawOrder: () => viewport.drawOrder(),
     objectScreen: (id: string) => viewport.objectScreen(id),
     objectRect: (id: string) => viewport.objectRect(id),