refactor(ui): alert rows are two lines of text — the heading line was redundant

Creator: system messages are limited to two lines; the label above the message ('STEAM ID NOT
PRESENT', 'STREAM') was repeating what the row already said and pushing the stack past its budget.

AttentionAlert loses Label; rows render Text only. The licence row is now exactly:
    Steam ID Limit: 30fps
    Click for More Info
(60fps with a close control once owned). Rows are identified by Id internally, so nothing in the UI
depends on the removed text. Tests updated to assert position/text rather than the heading.

ViewModels/MainViewModel.Alerts.cs

@@ -46,8 +46,6 @@ public partial class MainViewModel
         return $"Steam ID Limit: {entitled}fps\nClick for More Info";
     }
 
-    private string SteamLicenceLabel() => IsAppOwned ? "STEAM ID PRESENT" : "STEAM ID NOT PRESENT";
-
     /// <summary>Recomputes row 1 in place. Called at startup and whenever ownership changes.</summary>
     private void RefreshSteamLicenceAlert()
     {
@@ -63,7 +61,6 @@ public partial class MainViewModel
 
         var alert = new AttentionAlert(
             SteamLicenceAlertId,
-            SteamLicenceLabel(),
             SteamLicenceText(),
             IsPinned: !IsAppOwned,
             AttentionAlertAction.About);
@@ -76,9 +73,9 @@ public partial class MainViewModel
 
     /// <summary>Pushes an event alert. Newest sits directly under the licence indicator; older ones
     /// stack beneath, so the newest is the one nearest the eye.</summary>
-    private AttentionAlert? PushAttentionAlert(string id, string label, string text, long logFrom, long logTo)
+    private AttentionAlert? PushAttentionAlert(string id, string text, long logFrom, long logTo)
     {
-        var alert = new AttentionAlert(id, label, text, IsPinned: false, AttentionAlertAction.Logs, logFrom, logTo);
+        var alert = new AttentionAlert(id, text, IsPinned: false, AttentionAlertAction.Logs, logFrom, logTo);
         var insertAt = _attentionAlerts.Count(alert => alert.Id == SteamLicenceAlertId);
         var existing = _attentionAlerts.FirstOrDefault(candidate => candidate.Id == id);
         if (existing != null)
@@ -95,8 +92,8 @@ public partial class MainViewModel
     }
 
     /// <summary>Test seam: pushes an event row without a stream session behind it.</summary>
-    internal AttentionAlert? PushAttentionAlertForTest(string id, string label, string text, long logFrom, long logTo)
-        => PushAttentionAlert(id, label, text, logFrom, logTo);
+    internal AttentionAlert? PushAttentionAlertForTest(string id, string text, long logFrom, long logTo)
+        => PushAttentionAlert(id, text, logFrom, logTo);
 
     private void RemoveAttentionAlert(string id)
     {

ViewModels/MainViewModel.Recovery.cs

@@ -87,7 +87,6 @@ public partial class MainViewModel
                         : logFrom;
                     PushAttentionAlert(
                         "stream-recovery",
-                        "STREAM",
                         text,
                         logFrom,
                         Math.Max(logFrom, to));