Show local spots in bold and name the computer that made them

A spot an operator put on a bandmap, here or on another computer, is
drawn in bold. Its hover text names the computer instead of the
spotter's callsign. A spot from another computer carries the name from
the ADDSPOT message.

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

src/Nonemm.App/Windows/EntryWindow.Menu.cs

@@ -385,7 +385,7 @@ public sealed partial class EntryWindow
             return;
         }
         await cluster.SendSpotAsync(where, call, MessageExpander.Expand(session.Settings.SpotComment, Logging, session.Other(Logging)));
-        session.Bandmap.Add(new Spot(call, where, DateTime.UtcNow, SpotSource.Operator));
+        session.Bandmap.Add(new Spot(call, where, DateTime.UtcNow, SpotSource.Operator) { Computer = session.ComputerName });
         Status($"{call.Text} spotted on {where.Kilohertz:0.0}");
     }
 
@@ -428,7 +428,10 @@ public sealed partial class EntryWindow
             DateTime.UtcNow,
             SpotSource.Operator,
             session.Settings.Station.Callsign,
-            "Local spot"));
+            "Local spot")
+        {
+            Computer = session.ComputerName,
+        });
         Status($"{call.Text} stored on {Logging.Frequency.Kilohertz:0.0}");
         boxes[0].Focus();
     }