feat: replace /archive with release-cardinal searchable browser (Phase 9 §8.H)

Retire the three-card overview for a search + medium + genre browser over all
releases. Adds q/genre filter params to the api/release paged read path,
mirroring the existing api/track/page TrackFilter pattern.

DeepDrftPublic/Controllers/ReleaseProxyController.cs

@@ -22,10 +22,12 @@ public class ReleaseProxyController : ControllerBase
         _logger = logger;
     }
 
-    /// <summary>Proxies the paged release list, forwarding the optional medium filter and sort params.</summary>
+    /// <summary>Proxies the paged release list, forwarding the optional medium, search (q), genre, and sort params.</summary>
     [HttpGet]
     public async Task<ActionResult> GetReleases(
         [FromQuery] string? medium = null,
+        [FromQuery] string? q = null,
+        [FromQuery] string? genre = null,
         [FromQuery] int page = 1,
         [FromQuery] int pageSize = 20,
         [FromQuery] string? sortColumn = null,
@@ -35,6 +37,10 @@ public class ReleaseProxyController : ControllerBase
         var query = $"api/release?page={page}&pageSize={pageSize}&sortDescending={sortDescending}";
         if (!string.IsNullOrWhiteSpace(medium))
             query += $"&medium={Uri.EscapeDataString(medium)}";
+        if (!string.IsNullOrWhiteSpace(q))
+            query += $"&q={Uri.EscapeDataString(q)}";
+        if (!string.IsNullOrWhiteSpace(genre))
+            query += $"&genre={Uri.EscapeDataString(genre)}";
         if (!string.IsNullOrWhiteSpace(sortColumn))
             query += $"&sortColumn={Uri.EscapeDataString(sortColumn)}";