Profile: let the language picker sheet grow and scroll instead of ove…

lib/ui2/profile/profile.dart

@@ -212,22 +212,28 @@ Future<void> _pickLanguage(BuildContext c) async {
     context: c,
     backgroundColor: p.card,
     showDragHandle: true,
+    // The default sheet is capped at 9/16 of the screen; with seven languages
+    // the list overflowed it. Lift the cap and scroll if it still doesn't fit.
+    isScrollControlled: true,
+    useSafeArea: true, // a full-height sheet must not reach under the status bar
     builder: (sheet) => SafeArea(
-      child: Column(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          for (final code in options)
-            ListTile(
-              title: Text(_languageLabel(sheet, code), style: F.body.copyWith(color: p.ink)),
-              trailing: ctrl.code == code
-                  ? Icon(LucideIcons.check, size: 18, color: p.on(C.blue))
-                  : null,
-              onTap: () async {
-                await ctrl.setCode(code);
-                if (sheet.mounted) Navigator.of(sheet).pop();
-              },
-            ),
-        ],
+      child: SingleChildScrollView(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            for (final code in options)
+              ListTile(
+                title: Text(_languageLabel(sheet, code), style: F.body.copyWith(color: p.ink)),
+                trailing: ctrl.code == code
+                    ? Icon(LucideIcons.check, size: 18, color: p.on(C.blue))
+                    : null,
+                onTap: () async {
+                  await ctrl.setCode(code);
+                  if (sheet.mounted) Navigator.of(sheet).pop();
+                },
+              ),
+          ],
+        ),
       ),
     ),
   );

test/language_picker_sheet_test.dart

@@ -0,0 +1,47 @@
+// The language picker used to overflow its bottom sheet (capped at 9/16 of the
+// screen) once the list grew past what fits. It must lay out without an
+// overflow on a short screen, and every language must stay reachable.
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import 'package:openstrap_edge/l10n/app_localizations.dart';
+import 'package:openstrap_edge/state/locale_controller.dart';
+import 'package:openstrap_edge/ui2/profile/profile.dart';
+import 'package:openstrap_edge/ui2/ui2.dart';
+
+void main() {
+  testWidgets('language sheet scrolls on a short screen and selects the last language',
+      (tester) async {
+    SharedPreferences.setMockInitialValues({});
+    tester.view.physicalSize = const Size(360, 560);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.reset);
+
+    final ctrl = LocaleController.seed(null);
+    await tester.pumpWidget(ChangeNotifierProvider<LocaleController>.value(
+      value: ctrl,
+      child: MaterialApp(
+        theme: buildTheme(Brightness.dark),
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        supportedLocales: AppLocalizations.supportedLocales,
+        home: const ProfileHomeView(stats: ProfileStats(name: 'Sahil')),
+      ),
+    ));
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.text('System default').first);
+    await tester.pumpAndSettle();
+    expect(tester.takeException(), isNull, reason: 'sheet must not overflow');
+
+    final last = find.text('中文');
+    await tester.ensureVisible(last);
+    await tester.pumpAndSettle();
+    await tester.tap(last);
+    await tester.pumpAndSettle();
+
+    expect(ctrl.code, 'zh');
+    expect(find.text('Deutsch'), findsNothing, reason: 'sheet should be dismissed');
+  });
+}