Phase 9 Wave 4: ARCHIVE nav + Cuts/Sessions/Mixes pages + MixWaveformVisualizer

Replaces flat RELEASES/SESSIONS/MIXES nav with ARCHIVE dropdown (PageRoute.Children,
one-level cap, dual-role node). Adds /archive overview, /cuts (AlbumsView + medium
filter; /albums redirects), /sessions + /sessions/{id} (hero-dominant), /mixes +
/mixes/{id} (MixWaveformVisualizer full-page background). Extracts ReleaseDetailScaffold
from TrackDetail (invariant trio). PersistentComponentState bridge on all new pages.
Click-to-seek seam designed on MixWaveformVisualizer (inert until wired).

DeepDrftPublic.Client/Startup.cs

@@ -20,6 +20,12 @@ public static class Startup
         services.AddScoped<ITrackDataService, TrackClientDataService>();
         services.AddScoped<TracksViewModel>();
         services.AddScoped<TrackDetailViewModel>();
+
+        // Release read surface (Phase 9). Same HTTP posture as the track client — both
+        // WASM and SSR prerender call DeepDrftAPI over the "DeepDrft.API" client.
+        services.AddScoped<ReleaseClient>();
+        services.AddScoped<IReleaseDataService, ReleaseClientDataService>();
+        services.AddScoped<ReleaseDetailViewModel>();
     }
 
     public static void ConfigureApiHttpClient(IServiceCollection services, string baseAddress)