Add per-episode play tracking with bar chart in admin analytics

- POST /api/analytics/play records a play event (title + date) on first
  play per player mount, skipping admin sessions
- Plays persisted to data/episode-plays.json with total + byDay buckets
- Admin stats response includes episodePlays sorted by total plays
- AnalyticsPanel shows horizontal bar chart + summary cards for all
  episodes dynamically — new episodes appear automatically as played

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/AdminPage.tsx

@@ -564,6 +564,12 @@ export interface AdminStats {
     }>
     funnel?: { signups: number; firstVisit: number; firstCompletion: number }
   }
+  episodePlays?: Array<{
+    title: string
+    total: number
+    byDay: Record<string, number>
+    last30Days: Array<{ day: string; plays: number }>
+  }>
 }
 
 interface AdminAsset {

src/App.css

@@ -7896,6 +7896,14 @@
   margin-bottom: 1.5rem;
 }
 
+.admin-stats-chart-wrap {
+  background: #0e0e0b;
+  border: 1px solid rgba(201, 168, 76, 0.15);
+  border-radius: 10px;
+  padding: 1.25rem 1.25rem 1rem;
+  position: relative;
+}
+
 
 /* ── Admin: Study Users ── */
 .admin-study-users-list {

src/components/AnalyticsPanel.tsx

@@ -522,6 +522,50 @@ export function AnalyticsPanel({
         )}
       </div>
 
+      {/* Episode Plays */}
+      {stats.episodePlays && stats.episodePlays.length > 0 && (
+        <>
+          <div className="admin-stats-head admin-stats-head--visitors">
+            <h2>Episode Plays</h2>
+            <p>Tracked each time a visitor hits play on the audio player. One count per player mount.</p>
+          </div>
+          <div className="admin-stats-chart-wrap" style={{ marginBottom: '1.5rem' }}>
+            <Bar
+              data={{
+                labels: stats.episodePlays.slice(0, 12).map((ep: { title: string; total: number }) => ep.title.length > 40 ? ep.title.slice(0, 40) + '…' : ep.title),
+                datasets: [{
+                  label: 'Total Plays',
+                  data: stats.episodePlays.slice(0, 12).map((ep: { title: string; total: number }) => ep.total),
+                  backgroundColor: '#c9a84c',
+                  borderColor: '#8a6e28',
+                  borderWidth: 1,
+                  borderRadius: 4,
+                }],
+              }}
+              options={{
+                indexAxis: 'y' as const,
+                responsive: true,
+                maintainAspectRatio: false,
+                plugins: {
+                  legend: { display: false },
+                  tooltip: { callbacks: { label: (ctx) => ` ${ctx.parsed.x} plays` } },
+                },
+                scales: {
+                  x: { ticks: { color: '#b0a48c', font: { size: 11 } }, grid: { color: 'rgba(42,37,24,0.6)' } },
+                  y: { ticks: { color: '#f0ead8', font: { size: 11 } }, grid: { display: false } },
+                },
+              }}
+              style={{ height: `${Math.max(180, stats.episodePlays.slice(0, 12).length * 36)}px` }}
+            />
+          </div>
+          <div className="admin-stats-grid" style={{ marginBottom: '1.5rem' }}>
+            <article><h3>Total Episode Plays</h3><p>{stats.episodePlays.reduce((sum: number, ep: { total: number }) => sum + ep.total, 0).toLocaleString()}</p></article>
+            <article><h3>Episodes Played</h3><p>{stats.episodePlays.length.toLocaleString()}</p></article>
+            <article><h3>Most Played</h3><p style={{ fontSize: '0.8rem' }}>{stats.episodePlays[0]?.title ?? '—'}</p></article>
+          </div>
+        </>
+      )}
+
       {/* Contact Summary */}
       <div className="admin-stats-head admin-stats-head--visitors">
         <h2>Contact Summary</h2>

src/components/EpisodeAudioPlayer.tsx

@@ -35,6 +35,7 @@ export function EpisodeAudioPlayer({ src, title, size = 'full', spotifyUrl }: Ep
   const [playing, setPlaying] = useState(false)
   const [currentTime, setCurrentTime] = useState(0)
   const [duration, setDuration] = useState(0)
+  const playTrackedRef = useRef(false)
 
   useEffect(() => {
     const audio = audioRef.current
@@ -61,7 +62,17 @@ export function EpisodeAudioPlayer({ src, title, size = 'full', spotifyUrl }: Ep
       audio.pause()
       setPlaying(false)
     } else {
-      audio.play().then(() => setPlaying(true)).catch(() => {})
+      audio.play().then(() => {
+        setPlaying(true)
+        if (!playTrackedRef.current && title) {
+          playTrackedRef.current = true
+          fetch('/api/analytics/play', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ title }),
+          }).catch(() => {})
+        }
+      }).catch(() => {})
     }
   }