feat(species): derived verified reference links (GBIF/Wikipedia/Wikispecies)

Add a read-only "Learn more" section on the variety detail that surfaces
verified external references for the linked species, built deterministically
from bundled identifiers — no titles bundled, no network, offline-first:

- GBIF taxon page from the backbone key
- Wikipedia via Wikidata Special:GoToLinkedPage (locale-aware, RTL-safe,
  falls back to the Wikidata item when a language lacks the article)
- Wikispecies from the scientific name

Enrich the bundled catalog (species.json v3) with gbif_key + wikidata_qid for
all 14 species, cross-checked (each QID carries GBIF ID P846 = the key).
Schema already had the columns; seedBundled now persists and backfills them.

The grower's own manual links stay but are demoted (progressive disclosure):
the section only shows when links exist and "Add link" is a low-emphasis
button, since hand-adding a link is the rarer power move.

Pure-Dart link builder is unit-tested; repo persistence/backfill and the
detail-screen section are covered too.

apps/app_seeds/lib/i18n/en.i18n.json

@@ -148,6 +148,10 @@
     "addLink": "Add link",
     "linkUrl": "URL",
     "linkTitle": "Title (optional)",
+    "reference": "Learn more",
+    "refGbif": "GBIF",
+    "refWikipedia": "Wikipedia",
+    "refWikispecies": "Wikispecies",
     "notes": "Notes",
     "addLot": "Add lot",
     "editLot": "Edit lot",

apps/app_seeds/lib/i18n/es.i18n.json

@@ -148,6 +148,10 @@
     "addLink": "Añadir enlace",
     "linkUrl": "URL",
     "linkTitle": "Título (opcional)",
+    "reference": "Saber más",
+    "refGbif": "GBIF",
+    "refWikipedia": "Wikipedia",
+    "refWikispecies": "Wikispecies",
     "notes": "Notas",
     "addLot": "Añadir lote",
     "editLot": "Editar lote",

apps/app_seeds/lib/i18n/strings.g.dart

@@ -4,9 +4,9 @@
 /// To regenerate, run: `dart run slang`
 ///
 /// Locales: 2
-/// Strings: 554 (277 per locale)
+/// Strings: 562 (281 per locale)
 ///
-/// Built on 2026-07-09 at 20:14 UTC
+/// Built on 2026-07-09 at 20:38 UTC
 
 // coverage:ignore-file
 // ignore_for_file: type=lint, unused_import

apps/app_seeds/lib/i18n/strings_en.g.dart

@@ -495,6 +495,18 @@ class Translations$detail$en {
 	/// en: 'Title (optional)'
 	String get linkTitle => 'Title (optional)';
 
+	/// en: 'Learn more'
+	String get reference => 'Learn more';
+
+	/// en: 'GBIF'
+	String get refGbif => 'GBIF';
+
+	/// en: 'Wikipedia'
+	String get refWikipedia => 'Wikipedia';
+
+	/// en: 'Wikispecies'
+	String get refWikispecies => 'Wikispecies';
+
 	/// en: 'Notes'
 	String get notes => 'Notes';
 
@@ -1564,6 +1576,10 @@ extension on Translations {
 			'detail.addLink' => 'Add link',
 			'detail.linkUrl' => 'URL',
 			'detail.linkTitle' => 'Title (optional)',
+			'detail.reference' => 'Learn more',
+			'detail.refGbif' => 'GBIF',
+			'detail.refWikipedia' => 'Wikipedia',
+			'detail.refWikispecies' => 'Wikispecies',
 			'detail.notes' => 'Notes',
 			'detail.addLot' => 'Add lot',
 			'detail.editLot' => 'Edit lot',

apps/app_seeds/lib/i18n/strings_es.g.dart

@@ -288,6 +288,10 @@ class _Translations$detail$es extends Translations$detail$en {
 	@override String get addLink => 'Añadir enlace';
 	@override String get linkUrl => 'URL';
 	@override String get linkTitle => 'Título (opcional)';
+	@override String get reference => 'Saber más';
+	@override String get refGbif => 'GBIF';
+	@override String get refWikipedia => 'Wikipedia';
+	@override String get refWikispecies => 'Wikispecies';
 	@override String get notes => 'Notas';
 	@override String get addLot => 'Añadir lote';
 	@override String get editLot => 'Editar lote';
@@ -1030,6 +1034,10 @@ extension on TranslationsEs {
 			'detail.addLink' => 'Añadir enlace',
 			'detail.linkUrl' => 'URL',
 			'detail.linkTitle' => 'Título (opcional)',
+			'detail.reference' => 'Saber más',
+			'detail.refGbif' => 'GBIF',
+			'detail.refWikipedia' => 'Wikipedia',
+			'detail.refWikispecies' => 'Wikispecies',
 			'detail.notes' => 'Notas',
 			'detail.addLot' => 'Añadir lote',
 			'detail.editLot' => 'Editar lote',