feat(stats): flip home Plays card live (Phase 16.5)

Add TotalPlays + UniqueListeners to HomeStatsDto, composed at
StatsController from IEventService (no migration). Card reads via
existing persistent-state-bridged round-trip.

DeepDrftModels/DTOs/HomeStatsDto.cs

@@ -4,8 +4,8 @@ namespace DeepDrftModels.DTOs;
 
 /// <summary>
 /// Aggregate figures behind the public home hero stat row (NowPlayingStats). A single read returns
-/// everything the three cards need so the client makes one round-trip. All counts exclude soft-deleted
-/// rows. The Plays card is a static placeholder and has no field here.
+/// everything the three cards need so the client makes one round-trip. The track-domain counts exclude
+/// soft-deleted rows; the play-domain figures (Phase 16) come from the event domain.
 /// </summary>
 public class HomeStatsDto
 {
@@ -27,6 +27,20 @@ public class HomeStatsDto
     /// duration (not yet backfilled) contribute 0. The Mixes card's secondary figure, rendered hh:mm.
     /// </summary>
     public double MixRuntimeSeconds { get; set; }
+
+    /// <summary>
+    /// Site-wide total plays across all tracks — the sum of every play_counter's bucket columns
+    /// (partial + sampled + complete), all-time (Phase 16 §5). The Plays card's primary odometer figure.
+    /// Reads zero until the play-telemetry migration is applied; that is expected, not an error.
+    /// </summary>
+    public long TotalPlays { get; set; }
+
+    /// <summary>
+    /// Site-wide distinct anonymous listeners — distinct non-null anon_id across all play events,
+    /// all-time (Phase 16 §3 / D7). The Plays card's secondary line ("N listeners"). Over-counts by
+    /// design (one token per browser-install, honestly labelled "listeners").
+    /// </summary>
+    public int UniqueListeners { get; set; }
 }
 
 /// <summary>One row of the Cut release-type breakdown: a ReleaseType and how many Cut releases have it.</summary>