refactor(street-level): drop unused tile and pose fields; keep the sequence error on the sequence

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

src/ui/streetLevelPresentation.js

@@ -118,7 +118,10 @@ export function presentStreetLevelPanel(state, { now = Date.now() } = {}) {
     controlsDisabled: state.keyRequired === true,
     error: keyMissing
       ? keyHint()
-      : state.street.error || state.coverage.error || null,
+      : state.street.error ||
+        state.sequence.error ||
+        state.coverage.error ||
+        null,
     filter: { pano: filter.pano, sinceDays: Number(filter.sinceDays) || 0 },
     since: presentSince(filter.sinceDays, now),
     legend: state.providerOn !== false,

src/ui/streetLevelPresentation.test.mjs

@@ -124,7 +124,7 @@ test('the header pill is the on/off switch and reads OFF, LOADING or ON', () =>
   );
 });
 
-test('errors from the viewer or the coverage web surface in one alert', () => {
+test('errors from the viewer, the sequence or the coverage surface in one alert', () => {
   assert.equal(presentStreetLevelPanel(snapshot()).error, null);
   assert.equal(
     presentStreetLevelPanel(
@@ -132,6 +132,12 @@ test('errors from the viewer or the coverage web surface in one alert', () => {
     ).error,
     'Image could not be opened',
   );
+  assert.equal(
+    presentStreetLevelPanel(
+      snapshot({ sequence: { error: 'Sequence images unavailable' } }),
+    ).error,
+    'Sequence images unavailable',
+  );
   assert.equal(
     presentStreetLevelPanel(snapshot({ coverage: { error: 'Tile HTTP 502' } }))
       .error,