Merge branch 'worktree-print-labels': print seed labels with QR

# Conflicts:
#	apps/app_seeds/lib/i18n/strings.g.dart
#	apps/app_seeds/lib/ui/inventory_list_screen.dart

apps/app_seeds/test/services/label_sheet_service_test.dart

@@ -0,0 +1,92 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tane/services/file_service.dart';
+import 'package:tane/services/label_sheet_service.dart';
+
+/// Captures the bytes handed to the save dialog instead of touching disk.
+class _RecordingFileService implements FileService {
+  Uint8List? saved;
+  String? savedName;
+
+  @override
+  Future<String?> saveFile({
+    required String suggestedName,
+    required Uint8List bytes,
+  }) async {
+    saved = bytes;
+    savedName = suggestedName;
+    return '/dev/null/$suggestedName';
+  }
+
+  @override
+  Future<Uint8List?> pickFileBytes({List<String>? allowedExtensions}) async =>
+      null;
+}
+
+const _labels = [
+  LabelSheetLabel(
+    varietyLabel: 'Acelga de Perales',
+    commonName: 'Acelga',
+    scientificName: 'Beta vulgaris',
+    details: '2006 · Perales',
+    qrData: 'tanemaki://seed?v=Acelga+de+Perales&y=2006',
+  ),
+  LabelSheetLabel(
+    varietyLabel: 'Alubia de Tolosa',
+    qrData: 'tanemaki://seed?v=Alubia+de+Tolosa',
+  ),
+];
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  for (final format in LabelSheetFormat.values) {
+    test('buildPdf renders a well-formed PDF for $format', () async {
+      final service = LabelSheetService(files: _RecordingFileService());
+      final bytes = await service.buildPdf(labels: _labels, format: format);
+
+      // %PDF header + non-trivial body; text content is compressed, so the
+      // human-readable assertions live in the widget/data tests.
+      expect(String.fromCharCodes(bytes.take(5)), '%PDF-');
+      expect(bytes.length, greaterThan(1000));
+    });
+  }
+
+  test('buildPdf renders a name-only label (no optional fields)', () async {
+    final service = LabelSheetService(files: _RecordingFileService());
+    final bytes = await service.buildPdf(
+      labels: const [
+        LabelSheetLabel(varietyLabel: 'Maíz', qrData: 'tanemaki://seed?v=Maíz'),
+      ],
+      format: LabelSheetFormat.stickers,
+    );
+    expect(String.fromCharCodes(bytes.take(5)), '%PDF-');
+  });
+
+  test('buildPdf honours an RTL text direction', () async {
+    final service = LabelSheetService(files: _RecordingFileService());
+    final bytes = await service.buildPdf(
+      labels: const [
+        LabelSheetLabel(varietyLabel: 'بامية', qrData: 'tanemaki://seed?v=x'),
+      ],
+      format: LabelSheetFormat.cards,
+      rtl: true,
+    );
+    expect(String.fromCharCodes(bytes.take(5)), '%PDF-');
+  });
+
+  test('saveLabels hands the PDF to the save dialog', () async {
+    final files = _RecordingFileService();
+    final service = LabelSheetService(files: files);
+    final saved = await service.saveLabels(
+      labels: _labels,
+      format: LabelSheetFormat.cards,
+      suggestedName: 'tanemaki-labels-2026-07-10.pdf',
+    );
+
+    expect(saved, isTrue);
+    expect(files.savedName, 'tanemaki-labels-2026-07-10.pdf');
+    expect(String.fromCharCodes(files.saved!.take(5)), '%PDF-');
+  });
+}