feat(street-level): Street View polish — name, filters, legend, marker

- The chip reads GOOGLE STREET VIEW (and its caption link likewise).
- Providers declare the imagery filters they honour (`filters`, default
  pano + since). Street View declares none: every panorama is 360° and it
  draws no coverage to thin, so its lookups ignore the filters and the
  panel hides IMAGERY and SINCE while it is the only lit provider.
- The legend lists only providers that draw coverage lines, with
  Selected only beside one: Street View alone shows no legend.
- Providers may pick their on-globe marker (`marker`); Street View's is a
  Google-blue field-of-view cone from a white-ringed dot, in place of
  GEV's amber pin, and switches back for a Mapillary photo.

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

src/ui/streetLevelControls.js

@@ -69,6 +69,8 @@ export class StreetLevelControls {
       nearestBtn: byId('sl-nearest-btn'),
       error: byId('sl-error'),
       errorText: byId('sl-error-text'),
+      panoRow: byId('sl-pano-row'),
+      sinceRow: byId('sl-since-row'),
       sinceRange: byId('sl-since'),
       sinceLabel: byId('sl-since-label'),
       legend: byId('sl-legend'),
@@ -532,6 +534,11 @@ export class StreetLevelControls {
 
   _renderFilters(view) {
     const el = this._elements;
+    const shows = view.filterControls || { pano: true, since: true };
+    setProp(el.panoRow, 'hidden', !shows.pano);
+    setProp(el.sinceRow, 'hidden', !shows.since);
+    setProp(el.controls, 'hidden', !shows.pano && !shows.since);
+    setProp(el.legend, 'hidden', view.legend.length === 0);
     this._renderRadios(
       el.panoButtons,
       (button) => button.dataset.slPano === view.filter.pano,

src/ui/streetLevelControls.test.mjs

@@ -307,10 +307,12 @@ function panelDom() {
     add(settings, 'div', { id });
   // A missing key gates the filters only; the chips stay outside the gate.
   const controls = add(settings, 'fieldset', { id: 'sl-controls' });
+  const panoRow = add(controls, 'div', { id: 'sl-pano-row' });
   for (const pano of ['all', 'pano', 'flat'])
-    add(controls, 'button', { dataset: { slPano: pano } });
-  add(controls, 'input', { id: 'sl-since' });
-  add(controls, 'output', { id: 'sl-since-label' });
+    add(panoRow, 'button', { dataset: { slPano: pano } });
+  const sinceRow = add(controls, 'div', { id: 'sl-since-row' });
+  add(sinceRow, 'input', { id: 'sl-since' });
+  add(sinceRow, 'output', { id: 'sl-since-label' });
   add(settings, 'ul', { id: 'sl-legend' });
   const metaRow = add(settings, 'div', { classes: ['sl-meta-row'] });
   add(metaRow, 'div', { id: 'sl-coverage-meta' });
@@ -1207,3 +1209,39 @@ test('a refused key on one provider leaves the other chip switchable, and the re
     ]);
     assert.equal(calls.toasts.length, 0);
   }));
+
+test('Street View alone hides the imagery filters and the legend; Mapillary beside it brings them back', () =>
+  withDom(async (dom) => {
+    const state = uiState();
+    const { layer } = stubPanel(dom, state);
+    const shown = () => ({
+      pano: !dom.root.querySelector('#sl-pano-row').hidden,
+      since: !dom.root.querySelector('#sl-since-row').hidden,
+      controls: !dom.root.querySelector('#sl-controls').hidden,
+      legend: !dom.root.querySelector('#sl-legend').hidden,
+    });
+    assert.deepEqual(shown(), {
+      pano: true,
+      since: true,
+      controls: true,
+      legend: true,
+    });
+    layer.publish({
+      ...state,
+      filterControls: { pano: false, since: false },
+      legend: [],
+    });
+    assert.deepEqual(shown(), {
+      pano: false,
+      since: false,
+      controls: false,
+      legend: false,
+    });
+    layer.publish(state);
+    assert.deepEqual(shown(), {
+      pano: true,
+      since: true,
+      controls: true,
+      legend: true,
+    });
+  }));

src/ui/streetLevelPresentation.js

@@ -222,6 +222,11 @@ export function presentStreetLevelPanel(state, { now = Date.now() } = {}) {
       ? null
       : state.street.error || state.coverage.error || null,
     filter: { pano: filter.pano, sinceDays: Number(filter.sinceDays) || 0 },
+    // Only the filters a lit provider honours (none for Street View alone).
+    filterControls: {
+      pano: state.filterControls?.pano !== false,
+      since: state.filterControls?.since !== false,
+    },
     since: presentSince(filter.sinceDays, now),
     legend: state.legend || [],
     viewer: presentViewer(state),

src/ui/styles/street-level.css

@@ -229,7 +229,11 @@ button.sl-status:focus-visible {
   border-radius: 999px;
 }
 
-.sl-seg[hidden] {
+.sl-seg[hidden],
+.sl-controls[hidden],
+.sl-filters[hidden],
+.sl-since[hidden],
+.sl-legend[hidden] {
   display: none;
 }
 

src/ui/templates/layer-panels.html

@@ -118,7 +118,7 @@
             <!-- A missing key gates the filters only: the chips above stay
                  focusable so their tooltip can say how to add the key. -->
             <fieldset id="sl-controls" class="sl-controls">
-              <div class="sl-filters" role="group" aria-label="Imagery filters">
+              <div id="sl-pano-row" class="sl-filters" role="group" aria-label="Imagery filters">
                 <span class="cctv-summary-label">IMAGERY</span>
                 <div class="sl-seg" role="radiogroup" aria-label="Panorama filter">
                   <button type="button" class="sl-seg-btn is-active" data-sl-pano="all" role="radio" aria-checked="true">ALL</button>
@@ -126,7 +126,7 @@
                   <button type="button" class="sl-seg-btn" data-sl-pano="flat" role="radio" aria-checked="false" tabindex="-1">FLAT</button>
                 </div>
               </div>
-              <div class="sl-since">
+              <div id="sl-since-row" class="sl-since">
                 <label class="cctv-summary-label" for="sl-since">SINCE</label>
                 <input id="sl-since" class="sl-range" type="range" min="0" max="8" step="1" value="0" aria-valuetext="ANY DATE" aria-describedby="sl-since-label" />
                 <output id="sl-since-label" class="sl-since-label" for="sl-since">ANY DATE</output>