fix: decouple Stream Now label flag from re-entrancy guard

DeepDrftPublic.Client/Layout/DeepDrftMenu.razor

@@ -21,7 +21,7 @@
                     disabled="@_streamLoading"
                     aria-busy="@_streamLoading.ToString().ToLowerInvariant()"
                     @onclick="StreamNow">
-                @if (_streamLoading)
+                @if (_findingTrack)
                 {
                     <span>Finding a track&#8230;</span>
                 }
@@ -83,7 +83,7 @@
                             disabled="@_streamLoading"
                             aria-busy="@_streamLoading.ToString().ToLowerInvariant()"
                             @onclick="StreamNowMobile">
-                        @if (_streamLoading)
+                        @if (_findingTrack)
                         {
                             <span>Finding a track&#8230;</span>
                         }
@@ -118,6 +118,7 @@
     
     private bool _mobileMenuOpen;
     private bool _streamLoading;
+    private bool _findingTrack;
     private string? _streamMessage;
     private CancellationTokenSource? _messageCts;
 
@@ -135,6 +136,7 @@
         if (_streamLoading) return;
 
         _streamLoading = true;
+        _findingTrack = true;
         _streamMessage = null;
 
         // Warm the AudioContext FIRST, inside the gesture's call stack and before the network
@@ -164,9 +166,10 @@
             if (closeMobileMenu)
                 _mobileMenuOpen = false;
 
-            // Track is found — clear the loading state immediately so the button
-            // reverts to "Stream Now ▶" before the stream begins.
-            _streamLoading = false;
+            // Track is found — flip only the label flag so the button reverts to
+            // "Stream Now ▶" before the stream begins, while _streamLoading stays true
+            // to keep the button disabled and the re-entrancy guard intact.
+            _findingTrack = false;
             StateHasChanged();
 
             if (PlayerService is not null)
@@ -179,6 +182,7 @@
         finally
         {
             _streamLoading = false;
+            _findingTrack = false;
         }
     }