feat(block1): bundled species catalog + autocomplete link

Add a small curated catalog of Iberian horticultural species and let a variety
be linked to it from the edit sheet.

- assets/catalog/species.json: 14 species with botanical family and ES/EN
  common names (wikidata_qid/gbif_key deferred to the varilla enrichment).
- SpeciesRepository: idempotent seedBundled (is_bundled rows, keyed by
  scientific name) + search by scientific/common name with a locale-best label.
  Seeded on startup from DI.
- VarietyRepository.linkSpecies: sets species_id and prefills category from the
  species' family when empty (never overwrites an existing category).
  VarietyDetail now carries the scientific name.
- Edit sheet gains a live species-search field; the detail view shows the
  scientific name (italic). i18n strings added (ES/EN).

Tests: catalog parse, idempotent seeding, search by scientific/common name,
linkSpecies prefill semantics, and a widget test for the autocomplete → link →
scientific-name-shown flow. Full suite: 32 passing, 0 skipped.

apps/app_seeds/lib/di/injector.dart

@@ -5,6 +5,8 @@ import 'package:get_it/get_it.dart';
 import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
 
+import '../data/species_catalog.dart';
+import '../data/species_repository.dart';
 import '../data/variety_repository.dart';
 import '../db/database.dart';
 import '../db/encrypted_executor.dart';
@@ -31,9 +33,14 @@ Future<void> configureDependencies() async {
   // slice of the root seed. It becomes the user's public key in the social layer.
   final nodeId = rootSeedHex.substring(0, 16);
 
+  // Seed the bundled species catalog (idempotent) before the UI opens.
+  final speciesRepository = SpeciesRepository(database, idGen: IdGen());
+  await speciesRepository.seedBundled(await loadBundledSpecies());
+
   getIt
     ..registerSingleton<SecureKeyStore>(keyStore)
     ..registerSingleton<AppDatabase>(database)
+    ..registerSingleton<SpeciesRepository>(speciesRepository)
     ..registerSingleton<VarietyRepository>(
       VarietyRepository(database, idGen: IdGen(), nodeId: nodeId),
     );