Merge origin/main: Google Street View, KartaView and Panoramax on the slim Street Level

Main gained three imagery providers (Google Street View, KartaView,
Panoramax), shared line-coverage, cone and photo-viewer modules, one source
lit at a time and the translated interface. Their shared modules still
carried what this branch removes, so the merge ports them onto it:

- lineCoverage.js is this branch's coverage.js made provider-neutral
  (draped lines near the ground only, the selection drawn over them, key
  and rate-limit blocking); sequenceCones.js is sequences.js the same way.
  Mapillary, KartaView and Panoramax all build on them; Mapillary moves
  back to providers/mapillary/ beside the others.
- No ground casting, mesh sampling, surface modes, FOLLOW, legend, prewarm,
  orbit overview points (Panoramax's density dots included), stale-tile
  swaps or water-filled point budget come back.
- Kept from main because the new providers need them: requiresMapStack and
  attachMapStackController (Street View on Google 3D only), ground clicks,
  openNearest with an optional provider nearestImage, openImage {frame},
  reportError, the view-cone marker (now an SVG glyph), filters /
  coverageLabel / sinceBasis, OPEN STREET VIEW, keyAlternatives and i18n.
- photoViewer.js treats the viewer as expanded when its wrap is full screen
  or the iPhone popover, as EXPAND now is.
- The fixture browser gate keeps its 8 steps and adds one each for
  KartaView and Panoramax; catalogs, docs, boundaries and format scope
  follow.

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

src/ui/panelRails.test.mjs

@@ -679,6 +679,51 @@ test('narrow-screen rails pin every hosted panel glow inside its panel box', ()
   }
 });
 
+test('right layout ignores a CSS-hidden expanded panel when deciding exclusivity', () => {
+  const f = fixture('right');
+  const weather = element('weather-panel', { height: 300 });
+  weather.computed.display = 'none';
+  f.stack.children.push(weather);
+  weather.parentElement = f.stack;
+
+  f.run();
+
+  assert.equal(f.stack.classList.contains('layout-exclusive'), false);
+  assert.equal(f.stack.dataset.expandedCount, '0');
+  assert.equal(f.first.getAttribute('aria-hidden'), undefined);
+  assert.equal(f.second.getAttribute('aria-hidden'), undefined);
+  assert.equal(
+    weather.style.getPropertyValue('--right-panel-allocated-height'),
+    '',
+  );
+});
+
+test('right layout still restores panels that exclusive presentation hides', () => {
+  const f = fixture('right');
+  // Model layers.css: an exclusive rail hides its collapsed panels.
+  f.options.windowRef.getComputedStyle = (node) => ({
+    ...node.computed,
+    display:
+      f.stack.classList.contains('layout-exclusive') &&
+      node.classList.contains('collapsed')
+        ? 'none'
+        : node.computed.display,
+  });
+  f.expand(f.first, 250);
+  f.second.classList.add('layout-auto-collapsed');
+  f.stack.classList.add('layout-exclusive');
+
+  f.run();
+  assert.equal(f.stack.classList.contains('layout-exclusive'), true);
+  assert.equal(f.second.getAttribute('aria-hidden'), 'true');
+
+  f.options.hud.visible = false;
+  f.run();
+  assert.equal(f.second.classList.contains('collapsed'), false);
+  assert.equal(f.second.classList.contains('layout-auto-collapsed'), false);
+  assert.deepEqual(f.collapsed, ['second']);
+});
+
 test('right layout ignores a hidden panel: no lane, no gap, no auto-collapse', () => {
   const f = fixture('right');
   const imagery = element('recent-imagery-panel', { height: 0 });