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}`,
           );