fix(street-level): keep OPEN STREET VIEW whole beside a long coverage line

.scene-btn (flex: 1) loads after street-level.css and outranked the
button's flex: 0 0 auto, so with Mapillary and Street View both lit the
button shrank to its 72px minimum and its one-line label ran past the
panel edge. Scope the rule under .sl-meta-row; the coverage line wraps
instead. The live gate gives the share-link check 30 s, as the link is
written only once the view rests.

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

scripts/qa-street-level.mjs

@@ -1813,6 +1813,9 @@ async function main() {
                   .split('_')
                   .includes(token),
               option,
+              // The link is written once the view rests for 500 ms; under a
+              // software renderer with a photo open that can take a while.
+              { timeout: 30_000 },
             ),
             `the share link keeps the choice: ${option}`,
           );

src/streetLevelMarkup.test.mjs

@@ -253,3 +253,14 @@ test('the Cyber theme frames the Street Level panel like its rail peers (P3)', (
   // 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;/);
+});

src/ui/styles/street-level.css

@@ -195,7 +195,9 @@ button.sl-status:focus-visible {
   min-width: 0;
 }
 
-.sl-nearest-btn {
+/* Scoped to outrank .scene-btn's flex: 1, which squeezed the button to its
+   min-width beside a long coverage line and clipped its one-line label. */
+.sl-meta-row .sl-nearest-btn {
   flex: 0 0 auto;
 }
 
@@ -504,7 +506,9 @@ button.sl-status:focus-visible {
 /* A dragged window keeps its natural height, so bound it to the viewport:
    the rail's max-height: 100% does not bind an auto-height parent.
    Id-qualified to outrank that rule. */
-#right-context-rail > #street-level-panel.panel-floating > .street-level-panel-inner {
+#right-context-rail
+  > #street-level-panel.panel-floating
+  > .street-level-panel-inner {
   max-height: calc(100vh - 12px);
   overflow-y: auto;
 }