feat(inventory): photo-first drafts + on-device OCR (digitization R2+R4)

Lower the bulk-digitization cliff with two more routes on top of the
already-landed CSV import and "save and add another":

- Photo-first drafts (capture now, catalogue later): burst-capture
  photos (camera or multi-gallery) into unnamed draft varieties, shown
  in a "to catalogue" tray, hidden from the main list until named.
  Adds Variety.isDraft (schema), addDraftVariety/watchDrafts/nameDraft,
  the triage sheet and the inventory banner.
- On-device OCR label suggestion (Tesseract, offline, no Google): a
  "Suggest name from photo" button in the naming dialog behind a
  LabelTextExtractor interface (Tesseract on Android/iOS, no-op
  elsewhere). Reads the largest print via hOCR bounding boxes, drops
  boilerplate/low-confidence noise, preprocesses (grayscale, contrast,
  upscale) and sweeps rotations (0-315 deg) so tilted packets still
  read. Bundles tessdata_fast eng+spa; validated on-device against real
  packets. The photo is written to a temp file deleted immediately in a
  finally block (the plugin needs a path) - a bounded, documented
  exception to no-plaintext-at-rest.

This commit also carries the co-developed schema evolution v5 to v8 that
shares these files (organic flag, species viability years, crop
calendar, lot provenance/abundance/preservation format, condition
checks) plus their exports/migrations and i18n.

Tests: CSV/draft/OCR unit + widget + migration green in isolation.
Note: the full widget suite currently hangs (>10 min) - under investigation.

apps/app_seeds/lib/di/injector.dart

@@ -1,6 +1,8 @@
 import 'dart:io';
 
 import 'package:commons_core/commons_core.dart';
+import 'package:flutter/services.dart' show rootBundle;
+import 'package:flutter/widgets.dart';
 import 'package:get_it/get_it.dart';
 import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
@@ -10,11 +12,16 @@ import '../data/species_repository.dart';
 import '../data/variety_repository.dart';
 import '../db/database.dart';
 import '../db/encrypted_executor.dart';
+import '../i18n/strings.g.dart';
 import '../security/secret_store.dart';
 import '../security/secure_key_store.dart';
 import '../services/export_import_service.dart';
 import '../services/file_picker_file_service.dart';
 import '../services/file_service.dart';
+import '../services/ocr/label_text_extractor.dart';
+import '../services/ocr/ocr_language.dart';
+import '../services/ocr/tesseract_label_extractor.dart';
+import '../services/onboarding_store.dart';
 
 /// The app's service locator. Kept to the composition root — widgets get their
 /// repositories from here (or via BlocProvider), never by reaching into it deep
@@ -24,7 +31,8 @@ final GetIt getIt = GetIt.instance;
 /// Wires the encrypted DB, keystore and repositories. Call once from `main`
 /// before `runApp`; the DB key must exist before the DB opens.
 Future<void> configureDependencies() async {
-  final keyStore = SecureKeyStore(store: FlutterSecretStore());
+  final secretStore = FlutterSecretStore();
+  final keyStore = SecureKeyStore(store: secretStore);
   final dbKeyHex = await keyStore.databaseKeyHex();
   final rootSeedHex = await keyStore.rootSeedHex();
 
@@ -48,12 +56,23 @@ Future<void> configureDependencies() async {
 
   const fileService = FilePickerFileService();
 
+  // OCR label suggestions only where a native Tesseract engine exists; every
+  // other platform (desktop, web) degrades to the no-op and hides the button.
+  // The language pack(s) follow the user's locale(s) — never a fixed region —
+  // limited to what we actually bundle, always unioned with the Latin baseline.
+  final LabelTextExtractor labelExtractor =
+      (Platform.isAndroid || Platform.isIOS)
+      ? TesseractLabelExtractor(language: await _resolveOcrLanguage())
+      : const NoOpLabelTextExtractor();
+
   getIt
     ..registerSingleton<SecureKeyStore>(keyStore)
     ..registerSingleton<AppDatabase>(database)
     ..registerSingleton<SpeciesRepository>(speciesRepository)
     ..registerSingleton<VarietyRepository>(varietyRepository)
     ..registerSingleton<FileService>(fileService)
+    ..registerSingleton<LabelTextExtractor>(labelExtractor)
+    ..registerSingleton<OnboardingStore>(OnboardingStore(secretStore))
     ..registerSingleton<ExportImportService>(
       ExportImportService(repository: varietyRepository, files: fileService),
     );
@@ -63,3 +82,18 @@ Future<File> _databaseFile() async {
   final dir = await getApplicationDocumentsDirectory();
   return File(p.join(dir.path, 'tane_inventory.sqlite'));
 }
+
+/// Picks the Tesseract language pack(s) for the current locale(s), limited to
+/// the bundled packs listed in `tessdata_config.json`. Prefers the app's chosen
+/// language, then the device's ordered locales.
+Future<String> _resolveOcrLanguage() async {
+  final available = parseAvailableOcrLanguages(
+    await rootBundle.loadString('assets/tessdata_config.json'),
+  );
+  final preferred = <String>[
+    LocaleSettings.currentLocale.languageCode,
+    for (final l in WidgetsBinding.instance.platformDispatcher.locales)
+      l.languageCode,
+  ];
+  return resolveOcrLanguages(preferredLocales: preferred, available: available);
+}