Give the phone the desktop's face: Montserrat by default

src/DodoSSH.Client.Android/DodoSshAndroidApplication.cs

@@ -1,6 +1,7 @@
 // See the note at the top of MainActivity for why the platform namespaces are reached through `global::`.
 using Avalonia;
 using Avalonia.Android;
+using Avalonia.Media;
 using DodoSSH.Client.Android.Platform;
 using global::Android.App;
 using global::Android.Runtime;
@@ -46,6 +47,30 @@ public sealed class DodoSshAndroidApplication : AvaloniaAndroidApplication<DodoS
     }
 
     /// <inheritdoc />
+    /// <remarks>
+    /// This used to be the one place the two heads disagreed on purpose: the recorded v2 decision was
+    /// "Android recolours with the shared palette and keeps its own default sans", on the reasoning that a
+    /// phone's system font is a phone's own business. The user has reversed that, this pass — the phone now
+    /// takes the desktop's face as well as its colours, and <c>docs/design-import-gaps.md</c> is corrected
+    /// to say so rather than left asserting a decision that no longer holds.
+    ///
+    /// <c>WithInterFont</c> still registers Inter, for the same reason <c>Program.cs</c> keeps it on the
+    /// desktop: it is what the layout suite pins and what a glyph Montserrat does not cover falls back to.
+    /// What changes is which face answers first. Montserrat ships embedded in
+    /// <c>DodoSSH.Client.Shell/Assets/Fonts</c> already — this project references that assembly for
+    /// <c>Theme/Phone.axaml</c>'s own <c>MonoFont</c>, so no csproj or asset work was needed to reach it
+    /// from here, only the same <see cref="FontManagerOptions"/> block the desktop's
+    /// <c>Program.BuildAvaloniaApp</c> sets.
+    /// </remarks>
     protected override AppBuilder CustomizeAppBuilder(AppBuilder builder) =>
-        base.CustomizeAppBuilder(builder).WithInterFont();
+        base.CustomizeAppBuilder(builder)
+            .WithInterFont()
+            .With(new FontManagerOptions
+            {
+                DefaultFamilyName = "avares://DodoSSH.Client.Shell/Assets/Fonts#Montserrat",
+                FontFallbacks =
+                [
+                    new FontFallback { FontFamily = new FontFamily("avares://Avalonia.Fonts.Inter/Assets#Inter") },
+                ],
+            });
 }