fix(quick-add): wrap sheet action row to prevent overflow on small screens

The Cancel / Save-and-add-another / Save actions were a fixed Row that
could not shrink, so on narrow phones and long locales (es/pt/de/fr) the
buttons overflowed the right edge (the clipped 'Guardar'). Replace it with
an OverflowBar that wraps onto stacked, end-aligned lines when they don't
fit; move the added-count onto its own line above.

Guard it in small_screen_overflow_test.dart across the long locales.

apps/app_seeds/lib/ui/quick_add_sheet.dart

@@ -83,20 +83,27 @@ class QuickAddSheet extends StatelessWidget {
                 ),
                 if (state.expanded) const _MoreSection(),
                 const SizedBox(height: 8),
-                Row(
+                if (state.addedCount > 0)
+                  Padding(
+                    padding: const EdgeInsetsDirectional.only(bottom: 4),
+                    child: Text(
+                      t.quickAdd.addedCount(n: state.addedCount),
+                      style: Theme.of(context).textTheme.bodySmall,
+                    ),
+                  ),
+                // OverflowBar wraps the actions onto stacked lines when the
+                // labels don't fit the width (small phones, long locales),
+                // instead of clipping with a RenderFlex overflow.
+                OverflowBar(
+                  alignment: MainAxisAlignment.end,
+                  spacing: 8,
+                  overflowSpacing: 4,
+                  overflowAlignment: OverflowBarAlignment.end,
                   children: [
                     TextButton(
                       onPressed: () => Navigator.of(context).pop(),
                       child: Text(t.quickAdd.cancel),
                     ),
-                    if (state.addedCount > 0) ...[
-                      const SizedBox(width: 8),
-                      Text(
-                        t.quickAdd.addedCount(n: state.addedCount),
-                        style: Theme.of(context).textTheme.bodySmall,
-                      ),
-                    ],
-                    const Spacer(),
                     TextButton(
                       key: const Key('quickAdd.saveAndAddAnother'),
                       onPressed: state.submitting
@@ -104,7 +111,6 @@ class QuickAddSheet extends StatelessWidget {
                           : cubit.submitAndAddAnother,
                       child: Text(t.quickAdd.saveAndAddAnother),
                     ),
-                    const SizedBox(width: 8),
                     FilledButton(
                       key: const Key('quickAdd.save'),
                       onPressed: state.submitting ? null : cubit.submit,

apps/app_seeds/test/ui/small_screen_overflow_test.dart

@@ -20,8 +20,11 @@ import 'package:tane/ui/inventory_list_screen.dart';
 import 'package:tane/ui/market_screen.dart';
 import 'package:tane/ui/plantares_screen.dart';
 import 'package:tane/ui/profile_screen.dart';
+import 'package:tane/ui/quick_add_sheet.dart';
 import 'package:tane/ui/sales_screen.dart';
 import 'package:tane/ui/settings_screen.dart';
+import 'package:tane/state/quick_add_cubit.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 
 import '../support/test_support.dart';
 
@@ -322,6 +325,35 @@ void main() {
     await disposeTree(tester);
   });
 
+  // The quick-add sheet's action row (Cancel / "Save & add another" / Save) is
+  // the one modal we DO guard: unlike the height concern that excludes sheets
+  // above, this is a *horizontal* overflow (three text buttons + the longest
+  // "Guardar y añadir otra" label don't fit a narrow phone). We give it a
+  // bounded height by pumping it inside a Scaffold body, so only the width
+  // constraint bites — reproducing the reported "Guardar cut off" report.
+  for (final locale in longLocales) {
+    testWidgets('quick-add action row fits a small screen (${locale.languageCode})',
+        (tester) async {
+      final db = newTestDatabase();
+      addTearDown(db.close);
+      final repo = newTestRepository(db);
+      await pumpSmall(
+        tester,
+        wrapScreen(
+          repository: repo,
+          locale: locale,
+          child: Scaffold(
+            body: BlocProvider(
+              create: (_) => QuickAddCubit(repo),
+              child: const QuickAddSheet(),
+            ),
+          ),
+        ),
+      );
+      await disposeTree(tester);
+    });
+  }
+
   // NOTE: the variety-detail screen is deliberately NOT overflow-checked here.
   // It reports a ~2px overflow on a RenderFlex that is already DISPOSED/DEFUNCT
   // — a transient stale frame while its cubit's Drift stream rebuilds during