Give the application a settings area built from what really exists

src/DodoSSH.Client.App/Views/MainWindow.axaml.cs

@@ -111,11 +111,13 @@ internal sealed partial class MainWindow : Window
     /// </remarks>
     private IInputElement KeyboardHome => shell switch
     {
+        // v5c: settings mode has no keyboard-focused control of its own yet — its pages are read-only prose
+        // and buttons, the same shape the account and logs screens already fall back to the window for.
+        { IsSettingsMode: true } => this,
         { IsTerminalShowing: true } => Terminal,
         { Screen: ShellScreen.Keychain } => VaultPane.KeyboardTarget,
         { Screen: ShellScreen.Hosts } => HostsPane.KeyboardTarget,
         { Screen: ShellScreen.KnownHosts } => PinsPane.KeyboardTarget,
-        { Screen: ShellScreen.Import } => ImportPane.KeyboardTarget,
         { Screen: ShellScreen.Snippets } => SnippetsPane.KeyboardTarget,
         { Screen: ShellScreen.Logs } => LogsPane.KeyboardTarget,
         _ => this,
@@ -213,6 +215,25 @@ internal sealed partial class MainWindow : Window
         {
             Palette.HandleKey(e);
         }
+        // v5c: Escape leaves settings mode, the same full-window-state idiom the palette's own Escape
+        // already follows one branch up. Checked after the palette rather than before it: the two states
+        // are mutually exclusive in practice — opening the palette does not enter settings mode and entering
+        // settings does not open the palette — but an Escape while both were somehow true should close the
+        // thing drawn on top, which is the palette.
+        //
+        // v5c: with the importer up, Escape closes only that — the same "closest thing first" rule, and the
+        // same one the titlebar's own back button follows by showing "Back to preferences" rather than
+        // "Back to application" while IsImportOpen is true.
+        else if (e.Key == Key.Escape && viewModel.IsImportOpen)
+        {
+            viewModel.CloseImportCommand.Execute(null);
+            e.Handled = true;
+        }
+        else if (e.Key == Key.Escape && viewModel.IsSettingsMode)
+        {
+            viewModel.LeaveSettingsCommand.Execute(null);
+            e.Handled = true;
+        }
 
         base.OnKeyDown(e);
     }