feat(species): auto-classify variety species from its label

Infer the catalog species a free-text variety label names ("Maiz de la
abuela" -> Zea mays) and prefill the category from the species family.

- Pure, testable matcher (domain/species_autoclassify.dart): whole-word,
  accent/case-insensitive, Unicode-aware (any script), longest-name-wins,
  ambiguous names left unclassified, light plural fold.
- Quick-add and draft naming auto-link the species when the field is empty
  (non-destructive; an explicit category is kept).
- Edit sheet offers a one-tap suggestion from the typed name.

Tests: matcher unit, repository integration, SpeciesRepository.classifyLabel,
and an edit-sheet widget test.

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

@@ -630,6 +630,9 @@ class Translations$editVariety$en {
 	/// en: 'Search a species…'
 	String get speciesHint => 'Search a species…';
 
+	/// en: 'Suggested from the name'
+	String get speciesSuggested => 'Suggested from the name';
+
 	/// en: 'Organic'
 	String get organic => 'Organic';
 
@@ -1642,6 +1645,7 @@ extension on Translations {
 			'editVariety.notes' => 'Notes',
 			'editVariety.species' => 'Species (from catalog)',
 			'editVariety.speciesHint' => 'Search a species…',
+			'editVariety.speciesSuggested' => 'Suggested from the name',
 			'editVariety.organic' => 'Organic',
 			'editVariety.organicHint' => 'Grown organically (eco)',
 			'addLot.title' => 'Add lot',