fix(desktop): count only active MaterialLedger holds and link the nest page

MaterialLedger's Release lets a hold go, so a Released hold no longer keeps
a sheet for the nest; only Proposed, Approved and AwaitingCloseout holds,
the statuses ML counts against free stock, are open. The Has Been Cut
note's link pointed at /Nests/{id}, which ML does not serve; its nest page
is /Nests/Details/{id}.

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

OpenNest.Data/MaterialLedger/LedgerHoldSummary.cs

@@ -50,7 +50,7 @@ public sealed class LedgerHoldSummary
 
     public int OpenHolds { get; }
 
-    /// <summary>Holds in any other status: closed, cancelled, exception or unknown.</summary>
+    /// <summary>Holds in any other status: released, closed, cancelled, exception or unknown.</summary>
     public int ClosedHolds { get; }
 
     /// <summary>Sheets without an open hold.</summary>

OpenNest.Data/MaterialLedger/LedgerHolds.cs

@@ -30,13 +30,13 @@ public static class LedgerHoldStatuses
     public const string Exception = "Exception";
 
     /// <summary>
-    /// True for holds that still keep a sheet for the nest and need closing out. Closed,
-    /// cancelled, exception and unknown statuses are not open.
+    /// True for holds that still keep a sheet for the nest and need closing out: the statuses ML
+    /// counts against free stock. Released means the hold was let go, not sent to cutting, so it
+    /// is not open; nor are closed, cancelled, exception and unknown statuses.
     /// </summary>
     public static bool IsOpen(string? status) =>
         string.Equals(status, Proposed, StringComparison.OrdinalIgnoreCase)
         || string.Equals(status, Approved, StringComparison.OrdinalIgnoreCase)
-        || string.Equals(status, Released, StringComparison.OrdinalIgnoreCase)
         || string.Equals(status, AwaitingCloseout, StringComparison.OrdinalIgnoreCase);
 }