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/test/ui/quick_add_flow_test.dart

@@ -15,7 +15,12 @@ void main() {
       final repo = newTestRepository(db);
 
       await tester.pumpWidget(
-        TranslationProvider(child: TaneApp(repository: repo)),
+        TranslationProvider(
+          child: TaneApp(
+            repository: repo,
+            species: newTestSpeciesRepository(db),
+          ),
+        ),
       );
       await tester.pumpAndSettle();
 

apps/app_seeds/test/ui/variety_detail_screen_test.dart

@@ -1,6 +1,7 @@
 import 'package:commons_core/commons_core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:tane/data/species_repository.dart';
 import 'package:tane/db/database.dart';
 
 import '../support/test_support.dart';
@@ -22,7 +23,13 @@ void main() {
       quantity: const Quantity(kind: QuantityKind.cob),
     );
 
-    await tester.pumpWidget(wrapDetail(repository: repo, varietyId: id));
+    await tester.pumpWidget(
+      wrapDetail(
+        repository: repo,
+        varietyId: id,
+        species: newTestSpeciesRepository(db),
+      ),
+    );
     await tester.pumpAndSettle();
 
     expect(find.text('Maize'), findsOneWidget); // app bar title
@@ -35,7 +42,13 @@ void main() {
     final repo = newTestRepository(db);
     final id = await repo.addQuickVariety(label: 'Old name');
 
-    await tester.pumpWidget(wrapDetail(repository: repo, varietyId: id));
+    await tester.pumpWidget(
+      wrapDetail(
+        repository: repo,
+        varietyId: id,
+        species: newTestSpeciesRepository(db),
+      ),
+    );
     await tester.pumpAndSettle();
 
     await tester.tap(find.byKey(const Key('detail.edit')));
@@ -56,7 +69,13 @@ void main() {
     final repo = newTestRepository(db);
     final id = await repo.addQuickVariety(label: 'Bean');
 
-    await tester.pumpWidget(wrapDetail(repository: repo, varietyId: id));
+    await tester.pumpWidget(
+      wrapDetail(
+        repository: repo,
+        varietyId: id,
+        species: newTestSpeciesRepository(db),
+      ),
+    );
     await tester.pumpAndSettle();
 
     expect(find.text('No lots yet.'), findsOneWidget);
@@ -77,7 +96,13 @@ void main() {
     final repo = newTestRepository(db);
     final id = await repo.addQuickVariety(label: 'Doomed');
 
-    await tester.pumpWidget(wrapDetail(repository: repo, varietyId: id));
+    await tester.pumpWidget(
+      wrapDetail(
+        repository: repo,
+        varietyId: id,
+        species: newTestSpeciesRepository(db),
+      ),
+    );
     await tester.pumpAndSettle();
 
     await tester.tap(find.byKey(const Key('detail.delete')));
@@ -89,4 +114,47 @@ void main() {
     expect(find.text('This seed is no longer here.'), findsOneWidget);
     await disposeTree(tester);
   });
+
+  testWidgets(
+    'linking a species from the edit sheet shows its scientific name',
+    (tester) async {
+      final repo = newTestRepository(db);
+      final species = newTestSpeciesRepository(db);
+      await species.seedBundled(const [
+        SpeciesSeed(
+          scientificName: 'Solanum lycopersicum',
+          family: 'Solanaceae',
+          commonNames: {
+            'en': ['Tomato'],
+          },
+        ),
+      ]);
+      final id = await repo.addQuickVariety(label: "Grandma's tomato");
+
+      await tester.pumpWidget(
+        wrapDetail(repository: repo, varietyId: id, species: species),
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byKey(const Key('detail.edit')));
+      await tester.pumpAndSettle();
+
+      await tester.enterText(
+        find.byKey(const Key('editVariety.species')),
+        'toma',
+      );
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.text('Tomato (Solanum lycopersicum)'));
+      await tester.pumpAndSettle();
+
+      await tester.tap(find.byKey(const Key('editVariety.save')));
+      await tester.pumpAndSettle();
+
+      // Detail now shows the scientific name and the family-prefilled category.
+      expect(find.text('Solanum lycopersicum'), findsOneWidget);
+      expect(find.text('Solanaceae'), findsOneWidget);
+      await disposeTree(tester);
+    },
+  );
 }