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/streetLevelMarkup.test.mjs

@@ -11,6 +11,7 @@ const read = (file) => fs.readFileSync(path.join(ROOT, file), 'utf8');
 
 const html = expandApplicationHtml(read('index.html'));
 const css = readStylesheet(path.join(ROOT, 'style.css'));
+const panelCss = read('src/ui/styles/street-level.css');
 const panelChrome = read('src/ui/panelChrome.js');
 const layoutController = read('src/ui/panelLayoutController.js');
 
@@ -23,6 +24,23 @@ test('Street Level is a collapsible right-rail panel that starts collapsed', ()
     html,
     /<button class="panel-collapse-btn" data-collapse-target="street-level-panel"/,
   );
+  assert.match(
+    html,
+    /<span class="panel-title" data-i18n>STREET LEVEL<\/span>/,
+  );
+  // Provider-neutral header: no vendor mark; the inner restores its scroll.
+  assert.doesNotMatch(html, /sl-mark|mly-mark/);
+  assert.match(
+    html,
+    /<div class="street-level-panel-inner" data-rail-scroller>/,
+  );
+  assert.doesNotMatch(
+    html,
+    /mapillary-dock|sl-minimized|sl-3d-btn|sl-photoreal-btn/,
+  );
+});
+
+test('the panel is registered with panel chrome, cockpit entry and the right rail', () => {
   assert.match(panelChrome, /\{ id: 'street-level-panel' \}/);
   assert.match(
     panelChrome,
@@ -71,3 +89,28 @@ test('each radiogroup is one tab stop, on its checked button', () => {
       );
   }
 });
+
+test('the Cyber theme frames the Street Level panel like its rail peers (P3)', () => {
+  const cyber = read('src/ui/styles/cyber.css');
+  const inner = (cyber.match(/\.recent-imagery-panel-inner,/g) || []).length;
+  const panel = (cyber.match(/#recent-imagery-panel,/g) || []).length;
+  assert.ok(inner > 0 && panel > 0);
+  assert.equal(
+    (cyber.match(/\.street-level-panel-inner,/g) || []).length,
+    inner,
+  );
+  assert.equal((cyber.match(/#street-level-panel,/g) || []).length, panel);
+  // A theme header rule must be able to outrank the panel's own.
+  assert.doesNotMatch(panelCss, /#street-level-panel \.panel-header/);
+});
+
+test('OPEN STREET VIEW keeps its width beside a long coverage line', () => {
+  // .scene-btn grows and shrinks (flex: 1) and loads after this stylesheet:
+  // only a more specific rule keeps the button from being squeezed.
+  assert.match(css, /\.scene-btn \{[^}]*flex: 1;/);
+  assert.match(
+    panelCss,
+    /\.sl-meta-row \.sl-nearest-btn \{\s*flex: 0 0 auto;\s*\}/,
+  );
+  assert.match(panelCss, /\.sl-meta-row \.sl-meta \{[^}]*min-width: 0;/);
+});