fix(orbit): match topbar trigger height to neighboring Live button

Wrap the wordmark in a 1.5em inline-flex span so the button picks up
the same content height as a text span would, without scaling the
wordmark itself.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/OrbitStartTrigger.tsx

@@ -76,7 +76,9 @@ export default function OrbitStartTrigger() {
         style={{ position: 'relative', display: 'flex', alignItems: 'center', gap: '0.5rem', padding: '0.5rem 1rem' }}
       >
         <OrbitIcon size={18} className="orbit-start-trigger__spin" />
-        <OrbitWordmark height={14} />
+        <span style={{ display: 'inline-flex', alignItems: 'center', height: '1.5em' }}>
+          <OrbitWordmark height={14} />
+        </span>
       </button>
 
       {popoverOpen && createPortal(