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feat(i18n): full RTL/CJK support — fonts, Japanese locale, directional fixes

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Bundle Noto Sans Arabic + Noto Sans JP (SIL OFL 1.1) as per-glyph fallbacks
for both the UI text theme and every generated PDF, so RTL (Arabic) and CJK
render on all platforms — including desktop, where the system font may lack
them — instead of tofu. A shared pdf_fonts.dart centralizes the PDF theme and
the three label/catalog/recovery services reuse it.

Add Japanese (ja) as the CJK reference locale — fittingly, the app's own name
is Japanese (種, tane, 'seed'). Core strings translated; the rest fall back to
English via slang. Wired into supportedLocales (automatic) and the settings
picker.

Fix three physical Alignment.centerLeft -> AlignmentDirectional.centerStart in
variety_detail_screen, and make month-abbreviation and avatar-initial
truncation grapheme-safe (.characters) so CJK text is never cut mid-character.

Tests: CJK/Arabic PDF glyph render, ja locale resolution + English fallback.
The chat-bubble mirroring flagged by the audit was verified correct (already
respects Directionality) and left unchanged.
This commit is contained in:
vjrj 2026-07-14 11:11:19 +02:00
parent 41ea6735d2
commit baa8867287
31 changed files with 686 additions and 104 deletions
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17
apps/app_seeds/lib/services/recovery_sheet_service.dart
View file

@ -1,10 +1,10 @@
import 'dart:typed_data';
import 'package:flutter/services.dart' show rootBundle;
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'file_service.dart';
import 'pdf_fonts.dart';
/// Renders the printable recovery sheet — a QR plus the typed code and short
/// instructions ("keep two paper copies, like your best seed"). All strings
@ -19,22 +19,15 @@ class RecoverySheetService {
required String intro,
required String code,
}) async {
final base = pw.Font.ttf(
await rootBundle.load('assets/fonts/DejaVuSans.ttf'),
);
final bold = pw.Font.ttf(
await rootBundle.load('assets/fonts/DejaVuSans-Bold.ttf'),
);
final doc = pw.Document(
theme: pw.ThemeData.withFont(base: base, bold: bold),
);
final fonts = await loadPdfFonts();
final doc = pw.Document(theme: fonts.theme);
doc.addPage(
pw.Page(
pageFormat: PdfPageFormat.a4,
build: (context) => pw.Column(
crossAxisAlignment: pw.CrossAxisAlignment.start,
children: [
pw.Text(title, style: pw.TextStyle(font: bold, fontSize: 20)),
pw.Text(title, style: pw.TextStyle(font: fonts.bold, fontSize: 20)),
pw.SizedBox(height: 12),
pw.Text(intro, style: const pw.TextStyle(fontSize: 11)),
pw.SizedBox(height: 24),
@ -54,7 +47,7 @@ class RecoverySheetService {
child: pw.Text(
code,
textAlign: pw.TextAlign.center,
style: pw.TextStyle(font: bold, fontSize: 12),
style: pw.TextStyle(font: fonts.bold, fontSize: 12),
),
),
],