feat(ui): remember status-bar location mode as a user setting

Clicking the location label now saves the mouse-follow/click-only choice
to StatusBarLocationFollowsMouse (default true), so it survives restarts.

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

OpenNest/Forms/MainStatusBar.cs

@@ -4,13 +4,15 @@ using System.Linq;
 using System.Windows.Forms;
 using OpenNest.Collections;
 using OpenNest.Geometry;
+using OpenNest.Properties;
 
 namespace OpenNest.Forms
 {
     /// <summary>
     /// The main window's status labels for the active nest document: status text, cursor
     /// location, selection bounds and plate index/size/quantity/utilization. The location
-    /// follows the mouse (the default, throttled), or only left clicks while click mode is on.
+    /// follows the mouse (the default, throttled), or only left clicks while click mode is on;
+    /// the mode persists as a user setting.
     /// </summary>
     internal sealed class MainStatusBar
     {
@@ -27,7 +29,7 @@ namespace OpenNest.Forms
         private readonly Timer locationTimer;
 
         private EditNestForm form;
-        private bool clickUpdatesLocation;
+        private bool clickUpdatesLocation = !Settings.Default.StatusBarLocationFollowsMouse;
         private bool locationPending;
 
         public MainStatusBar(ToolStripStatusLabel status, ToolStripStatusLabel location,
@@ -93,6 +95,8 @@ namespace OpenNest.Forms
         public void ToggleLocationMode()
         {
             clickUpdatesLocation = !clickUpdatesLocation;
+            Settings.Default.StatusBarLocationFollowsMouse = !clickUpdatesLocation;
+            Settings.Default.Save();
             ApplyLocationMode();
         }
 

OpenNest/Properties/Settings.Designer.cs

@@ -283,5 +283,18 @@ namespace OpenNest.Properties {
                 this["DrawingLibraryCutType"] = value;
             }
         }
+
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("True")]
+        // Status-bar location follows the mouse; false updates it only on left clicks.
+        public bool StatusBarLocationFollowsMouse {
+            get {
+                return ((bool)(this["StatusBarLocationFollowsMouse"]));
+            }
+            set {
+                this["StatusBarLocationFollowsMouse"] = value;
+            }
+        }
     }
 }

OpenNest/Properties/Settings.settings

@@ -68,5 +68,8 @@
     <Setting Name="DrawingLibraryCutType" Type="System.String" Scope="User">
       <Value Profile="(Default)">Laser</Value>
     </Setting>
+    <Setting Name="StatusBarLocationFollowsMouse" Type="System.Boolean" Scope="User">
+      <Value Profile="(Default)">True</Value>
+    </Setting>
   </Settings>
 </SettingsFile>