fix(street-level): keep cones on low ground, and gekh's P3s

From gekh's review of db79027, each with a test that fails before:

- P2: image cones and the photo marker no longer disappear where the
  ground lies below the WGS84 ellipsoid (NYC -22 m, Colombo -95 m). The
  horizon cull's occluder is WGS84 shrunk by 1 km (HORIZON_CULL_DEPTH_M),
  below any real surface, so a camera near or under the ellipsoid no
  longer treats every lower point as behind the horizon; the far side of
  the Earth is still hidden from orbit (tested).
- Mesh range across the date line: the camera's longitude is taken to the
  box's side of +-180 before clamping (meshBoxInRange), so a tile just
  across the line is not measured from its far edge.
- MapillaryJS no longer tracks window resizes (trackResize: false): the
  panel's ResizeObserver resizes the viewer and skips it while hidden, so
  a window resize after closing a photo cannot ask for a tile at z=NaN.
- A key-less install sends no tile requests before the key status is
  known: coverage waits for the first status answer and the provider
  refreshes it once the status lands.
- constructCatalog takes the source method list from MAPILLARY_SOURCE_
  METHODS; sequences.js imports view.js once; the provider's unused
  re-exports are gone.

Verified: unit 5970 pass; strict fixture gate on a production build 28 ok
+ 2 "no Google 3D" skips and the panel gate 6/6 (QA_FAIL_ON_RETRY=1);
live gate with a real token 25 ok + 3 fixture-only skips.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/layers/streetLevel/providers/mapillary/sequences.js

@@ -2,9 +2,8 @@ import * as Cesium from 'cesium';
 import { imageConeGlyph } from '../../glyphs.js';
 import { passesImageryFilter } from '../../filter.js';
 import { refineHeights } from '../../groundCast.js';
-import { createHorizonCull } from '../../view.js';
+import { createHorizonCull, metresBetween } from '../../view.js';
 import { meshCellKey } from '../../meshSampler.js';
-import { metresBetween } from '../../view.js';
 import {
   COLORS,
   IMAGE_CONE_MIN_SPACING_M,