Make the run switch a switch, and split the tuning tolerance by mode

Three things you could not see or could not set.

Run and S&P were a label saying which one you were in. They are two buttons
now, the one you are in marked, either one clickable, which is what N1MM has.
Ctrl+? and F1 still work.

The tuning tolerance is one number per mode, as N1MM keeps it: CW, phone and
digital, 300 Hz each, which are its defaults. A phone signal is wide and a CW
one is not, so one number for both was wrong.

The bearing line went blank whenever it could not be worked out, which looks
exactly like a missing feature. It now says which end could not be placed and
what to do — no country file, no position for your own station, or a callsign
the country file does not place. It also gives miles beside the kilometres, as
N1MM does.

While clicking it: a marked button lost its mark under the pointer, because the
theme paints its own background there. The band buttons had the same fault.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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

@@ -20,6 +20,8 @@ public sealed partial class EntryWindow : Window
     private EntryWindow? secondRadio;
     private readonly List<TextBox> boxes = [];
     private readonly List<Button> functionButtons = [];
+    private const double MilesPerKilometre = 0.621371;
+
     private static readonly IBrush Dark = new SolidColorBrush(Color.FromArgb(0x33, 0x80, 0x80, 0x80));
 
     private bool sending;
@@ -527,6 +529,21 @@ public sealed partial class EntryWindow : Window
         }
     }
 
+    private void OnRun(object? sender, RoutedEventArgs e) => SetRunning(true);
+
+    private void OnSearch(object? sender, RoutedEventArgs e) => SetRunning(false);
+
+    private void SetRunning(bool running)
+    {
+        if (Logging is null)
+        {
+            return;
+        }
+        Logging.IsRunning = running;
+        boxes[Logging.Entry.Focus].Focus();
+        Refresh();
+    }
+
     private void ToggleRun()
     {
         if (Logging is null)
@@ -572,8 +589,8 @@ public sealed partial class EntryWindow : Window
             ? $"{Logging.Frequency.Kilohertz:0.00} ▸ {Logging.TransmitFrequency.Kilohertz:0.0}"
             : Logging.Frequency.Kilohertz.ToString("0.00");
         ModeText.Text = Logging.Mode.Name;
-        RunText.Text = Logging.IsRunning ? "RUN" : "S&P";
-        RunBorder.Background = Logging.IsRunning ? Verdicts.Worth : new SolidColorBrush(Color.FromArgb(0x22, 0x80, 0x80, 0x80));
+        RunButton.Classes.Set("here", Logging.IsRunning);
+        SearchButton.Classes.Set("here", !Logging.IsRunning);
         ContestText.Text = ContestLine();
 
         Title = TitleLine();
@@ -637,14 +654,33 @@ public sealed partial class EntryWindow : Window
     /// line under its entry window.
     private string PathLine()
     {
-        if (Logging is null || StationPath.For(Logging, DateTime.UtcNow) is not { } path)
+        if (Logging is null || Logging.Entry.Call.Trim().Length == 0)
         {
             return "";
         }
+        if (StationPath.For(Logging, DateTime.UtcNow) is not { } path)
+        {
+            return WhyNoPath();
+        }
         string sun = path.Sunrise is { } rise && path.Sunset is { } set
             ? $" · SR {rise:HH:mm}Z SS {set:HH:mm}Z"
             : " · no sunrise or sunset today";
-        return $"Hdg {path.Heading:0}° · LP {path.LongPath:0}° · {path.DistanceKm:N0} km{sun}";
+        return $"Hdg {path.Heading:0}° · LP {path.LongPath:0}° · "
+            + $"{path.DistanceKm:N0} km · {path.DistanceKm * MilesPerKilometre:N0} mi{sun}";
+    }
+
+    /// A blank line where a bearing should be is a puzzle. This says which of
+    /// the two ends could not be placed and what to do about it.
+    private string WhyNoPath()
+    {
+        if (session.Countries is null)
+        {
+            return "no bearing — download the country file, in Config ▸ Download Country File";
+        }
+        return Logging?.Me.GridSquare.Trim().Length == 0
+               && session.Countries.Find(Logging.Me.Callsign) is null
+            ? "no bearing — your own station has no position, so set your grid in Config ▸ Station"
+            : "no bearing — the country file does not place this callsign";
     }
 
     private string VerdictLine(Verdict? verdict)