Study hub: show available vs coming-soon study counts instead of total tracks; v2.8.5

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/studyPages.tsx

@@ -929,7 +929,7 @@ export function StudyLandingPage({ content }: Props) {
           <h1>Study at Your Own Pace</h1>
           <p className="study-course-hero-copy">Pick a study track, move lesson by lesson on your own schedule, and keep personal notes as you grow through each passage.</p>
           <div className="study-course-meta">
-            <span>{studies.length} study tracks</span>
+            <span>{activeStudies.length} {activeStudies.length === 1 ? 'study' : 'studies'} available{plannedStudies.length > 0 ? ` · ${plannedStudies.length} coming soon` : ''}</span>
             <span>Self-paced flow</span>
             <span>Personal notes</span>
             <span>Audio + commentary</span>