Keep Skills and MCP lists stable when toggling

CHANGELOG.md

@@ -62,6 +62,10 @@ the engine generation, so it moves 0.14.1 → 0.15.0.
   Desktop against a real `@directory` request.
 
 ### Fixed
+- **Skill and MCP toggles no longer redraw the entire management list.** Enabling or disabling an
+  item now updates that toggle in place while the app applies the change to active agents. The list
+  keeps its current order and scroll position; it is reconciled the next time the page is opened,
+  filtered, or explicitly refreshed.
 - **The token total now reflects what the provider actually processed.** Desktop no longer adds
   rough character-based estimates for reads, searches, web results, writes, or attachments on top
   of the provider's prompt and completion counts. File reads still show their line counts.

src/MandoCode.Desktop/MainWindow.Mcp.cs

@@ -130,7 +130,13 @@ private async void McpEnabled_Toggled(object sender, RoutedEventArgs e)
 
         McpPageStatus.Text = sw.IsOn ? $"Enabling “{row.Name}”…" : $"Disabling “{row.Name}”…";
         await Task.Run(() => _controller.SaveMcpServerAsync(row.Name, row.Name, server));
-        await RefreshMcpListAsync();
+
+        // Do not replace the grouped ItemsSource for a single toggle. Recreating the list makes
+        // every row animate back into place and moves this server between groups while the user is
+        // still looking at it. The durable config and live agent tools are already updated above;
+        // the current view is reconciled when the page is opened again, filtered, or refreshed.
+        row.Enabled = sw.IsOn;
+        McpPageStatus.Text = sw.IsOn ? $"Enabled “{row.Name}”." : $"Disabled “{row.Name}”.";
     }
 
     /// <summary>Runs a slash command through the normal pipeline (transcript echo, wizard

src/MandoCode.Desktop/MainWindow.Skills.cs

@@ -105,7 +105,9 @@ private void ApplySkillFilter()
             SkillsPageStatus.Text = $"{total} skill{(total == 1 ? "" : "s")}, {enabledTotal} enabled  ·  {_skillCoordinator.UserSkillsDirectory}";
     }
 
-    /// <summary>Reload every agent's skill set + prompt, then re-render the list and report.</summary>
+    /// <summary>Reload every agent's skill set + prompt, then re-render the list and report.
+    /// Use this after a structural change such as create, edit, install, delete, or an explicit
+    /// refresh. A simple enable/disable change deliberately keeps the current list in place.</summary>
     private async Task ApplySkillChangeAsync(string status)
     {
         await _skillCoordinator.ReloadAllAsync();
@@ -138,7 +140,13 @@ private async void SkillEnabled_Toggled(object sender, RoutedEventArgs e)
         try
         {
             _skillCoordinator.SetEnabled(row.FolderPath, sw.IsOn);
-            await ApplySkillChangeAsync(sw.IsOn ? $"Enabled “{row.Name}”." : $"Disabled “{row.Name}”.");
+            // Keep this row exactly where the user toggled it. Reapplying the grouped ItemsSource
+            // would remove and recreate every row, producing a distracting slide animation and
+            // reordering enabled/disabled groups mid-click. The persisted state is reconciled on
+            // the next page open, filter change, or explicit refresh.
+            row.Enabled = sw.IsOn;
+            await _skillCoordinator.ReloadAllAsync();
+            SkillsPageStatus.Text = sw.IsOn ? $"Enabled “{row.Name}”." : $"Disabled “{row.Name}”.";
         }
         catch (Exception ex)
         {

src/MandoCode.Desktop/MainWindow.ViewModels.cs

@@ -192,7 +192,7 @@ public sealed class McpRow
     public string Status { get; init; } = "";
     public SolidColorBrush StatusBrush { get; init; } = new(Colors.Gray);
     /// <summary>Per-server on/off (the config's Disabled flag, inverted). Shared by every agent.</summary>
-    public bool Enabled { get; init; }
+    public bool Enabled { get; set; }
 }
 
 /// <summary>A section of the skills list (e.g. "Enabled (12)"). A List subclass so a
@@ -218,7 +218,7 @@ public sealed class SkillRow
     public string Description { get; init; } = "";
     public string Body { get; init; } = "";
     public string FolderPath { get; init; } = "";
-    public bool Enabled { get; init; }
+    public bool Enabled { get; set; }
 
     // Size of the instructions body — what gets injected into the prompt on load, so it's the cost
     // that spins a local model up. ~4 chars/token is the usual rough estimate.