feat(shell): real sprout logo on home + basic Settings screen

- Bundle the real sprout logo (docs/logo.png → assets/logo.png) and show it on
  the home menu instead of a Material icon.
- Settings screen: switch language (Español / English / system) via slang, plus
  an About tile (logo, app name, one-line description). Drawer "Settings" is now
  active and routes to /settings.

Tests: drawer Settings opens the screen and shows the language options. 54 green.

apps/app_seeds/lib/app.dart

@@ -10,6 +10,7 @@ import 'state/inventory_cubit.dart';
 import 'state/variety_detail_cubit.dart';
 import 'ui/home_screen.dart';
 import 'ui/inventory_list_screen.dart';
+import 'ui/settings_screen.dart';
 import 'ui/theme.dart';
 import 'ui/variety_detail_screen.dart';
 
@@ -27,6 +28,10 @@ class TaneApp extends StatelessWidget {
     return GoRouter(
       routes: [
         GoRoute(path: '/', builder: (context, state) => const HomeScreen()),
+        GoRoute(
+          path: '/settings',
+          builder: (context, state) => const SettingsScreen(),
+        ),
         GoRoute(
           path: '/inventory',
           builder: (context, state) => BlocProvider(

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

@@ -23,6 +23,14 @@
     "following": "Following",
     "settings": "Settings"
   },
+  "settings": {
+    "language": "Language",
+    "systemLanguage": "System language",
+    "langEs": "Español",
+    "langEn": "English",
+    "about": "About",
+    "aboutText": "Local-first, encrypted inventory for traditional seeds. AGPL-3.0."
+  },
   "inventory": {
     "title": "Inventory",
     "searchHint": "Search seeds",

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

@@ -23,6 +23,14 @@
     "following": "Siguiendo",
     "settings": "Ajustes"
   },
+  "settings": {
+    "language": "Idioma",
+    "systemLanguage": "Idioma del sistema",
+    "langEs": "Español",
+    "langEn": "English",
+    "about": "Acerca de",
+    "aboutText": "Inventario local y cifrado para semillas tradicionales. AGPL-3.0."
+  },
   "inventory": {
     "title": "Inventario",
     "searchHint": "Buscar semillas",

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

@@ -4,9 +4,9 @@
 /// To regenerate, run: `dart run slang`
 ///
 /// Locales: 2
-/// Strings: 244 (122 per locale)
+/// Strings: 256 (128 per locale)
 ///
-/// Built on 2026-07-08 at 10:27 UTC
+/// Built on 2026-07-08 at 12:01 UTC
 
 // coverage:ignore-file
 // ignore_for_file: type=lint, unused_import

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

@@ -44,6 +44,7 @@ class Translations with BaseTranslations<AppLocale, Translations> {
 	late final Translations$common$en common = Translations$common$en.internal(_root);
 	late final Translations$home$en home = Translations$home$en.internal(_root);
 	late final Translations$menu$en menu = Translations$menu$en.internal(_root);
+	late final Translations$settings$en settings = Translations$settings$en.internal(_root);
 	late final Translations$inventory$en inventory = Translations$inventory$en.internal(_root);
 	late final Translations$quickAdd$en quickAdd = Translations$quickAdd$en.internal(_root);
 	late final Translations$detail$en detail = Translations$detail$en.internal(_root);
@@ -139,6 +140,33 @@ class Translations$menu$en {
 	String get settings => 'Settings';
 }
 
+// Path: settings
+class Translations$settings$en {
+	Translations$settings$en.internal(this._root);
+
+	final Translations _root; // ignore: unused_field
+
+	// Translations
+
+	/// en: 'Language'
+	String get language => 'Language';
+
+	/// en: 'System language'
+	String get systemLanguage => 'System language';
+
+	/// en: 'Español'
+	String get langEs => 'Español';
+
+	/// en: 'English'
+	String get langEn => 'English';
+
+	/// en: 'About'
+	String get about => 'About';
+
+	/// en: 'Local-first, encrypted inventory for traditional seeds. AGPL-3.0.'
+	String get aboutText => 'Local-first, encrypted inventory for traditional seeds. AGPL-3.0.';
+}
+
 // Path: inventory
 class Translations$inventory$en {
 	Translations$inventory$en.internal(this._root);
@@ -752,6 +780,12 @@ extension on Translations {
 			'menu.wishlist' => 'Wishlist',
 			'menu.following' => 'Following',
 			'menu.settings' => 'Settings',
+			'settings.language' => 'Language',
+			'settings.systemLanguage' => 'System language',
+			'settings.langEs' => 'Español',
+			'settings.langEn' => 'English',
+			'settings.about' => 'About',
+			'settings.aboutText' => 'Local-first, encrypted inventory for traditional seeds. AGPL-3.0.',
 			'inventory.title' => 'Inventory',
 			'inventory.searchHint' => 'Search seeds',
 			'inventory.empty' => 'No seeds yet. Tap + to add your first.',

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

@@ -43,6 +43,7 @@ class TranslationsEs extends Translations with BaseTranslations<AppLocale, Trans
 	@override late final _Translations$common$es common = _Translations$common$es._(_root);
 	@override late final _Translations$home$es home = _Translations$home$es._(_root);
 	@override late final _Translations$menu$es menu = _Translations$menu$es._(_root);
+	@override late final _Translations$settings$es settings = _Translations$settings$es._(_root);
 	@override late final _Translations$inventory$es inventory = _Translations$inventory$es._(_root);
 	@override late final _Translations$quickAdd$es quickAdd = _Translations$quickAdd$es._(_root);
 	@override late final _Translations$detail$es detail = _Translations$detail$es._(_root);
@@ -106,6 +107,21 @@ class _Translations$menu$es extends Translations$menu$en {
 	@override String get settings => 'Ajustes';
 }
 
+// Path: settings
+class _Translations$settings$es extends Translations$settings$en {
+	_Translations$settings$es._(TranslationsEs root) : this._root = root, super.internal(root);
+
+	final TranslationsEs _root; // ignore: unused_field
+
+	// Translations
+	@override String get language => 'Idioma';
+	@override String get systemLanguage => 'Idioma del sistema';
+	@override String get langEs => 'Español';
+	@override String get langEn => 'English';
+	@override String get about => 'Acerca de';
+	@override String get aboutText => 'Inventario local y cifrado para semillas tradicionales. AGPL-3.0.';
+}
+
 // Path: inventory
 class _Translations$inventory$es extends Translations$inventory$en {
 	_Translations$inventory$es._(TranslationsEs root) : this._root = root, super.internal(root);
@@ -529,6 +545,12 @@ extension on TranslationsEs {
 			'menu.wishlist' => 'Lista de deseos',
 			'menu.following' => 'Siguiendo',
 			'menu.settings' => 'Ajustes',
+			'settings.language' => 'Idioma',
+			'settings.systemLanguage' => 'Idioma del sistema',
+			'settings.langEs' => 'Español',
+			'settings.langEn' => 'English',
+			'settings.about' => 'Acerca de',
+			'settings.aboutText' => 'Inventario local y cifrado para semillas tradicionales. AGPL-3.0.',
 			'inventory.title' => 'Inventario',
 			'inventory.searchHint' => 'Buscar semillas',
 			'inventory.empty' => 'Aún no hay semillas. Toca + para añadir la primera.',

apps/app_seeds/lib/ui/app_drawer.dart

@@ -38,7 +38,14 @@ class AppDrawer extends StatelessWidget {
             _SoonItem(icon: Icons.group_outlined, label: t.menu.following),
             const Spacer(),
             const Divider(),
-            _SoonItem(icon: Icons.settings_outlined, label: t.menu.settings),
+            _ActiveItem(
+              icon: const Icon(Icons.settings_outlined),
+              label: t.menu.settings,
+              onTap: () {
+                Navigator.of(context).pop();
+                context.go('/settings');
+              },
+            ),
           ],
         ),
       ),

apps/app_seeds/lib/ui/home_screen.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
-import 'package:material_symbols_icons/symbols.dart';
 
 import '../i18n/strings.g.dart';
 import 'app_drawer.dart';
@@ -31,11 +30,10 @@ class HomeScreen extends StatelessWidget {
                   mainAxisSize: MainAxisSize.min,
                   crossAxisAlignment: CrossAxisAlignment.stretch,
                   children: [
-                    const Icon(
-                      Symbols.eco,
-                      size: 120,
-                      color: seedGreen,
-                      fill: 1,
+                    Image.asset(
+                      'assets/logo.png',
+                      height: 140,
+                      fit: BoxFit.contain,
                     ),
                     const SizedBox(height: 40),
                     _MenuButton(

apps/app_seeds/lib/ui/settings_screen.dart

@@ -0,0 +1,86 @@
+import 'package:flutter/material.dart';
+
+import '../i18n/strings.g.dart';
+import 'theme.dart';
+
+/// Basic settings: app language and an "about" section.
+class SettingsScreen extends StatelessWidget {
+  const SettingsScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final t = context.t;
+    final current = TranslationProvider.of(context).flutterLocale.languageCode;
+    return Scaffold(
+      appBar: AppBar(title: Text(t.menu.settings)),
+      body: ListView(
+        children: [
+          _SectionHeader(t.settings.language),
+          _LanguageTile(
+            label: t.settings.langEs,
+            selected: current == 'es',
+            onTap: () => LocaleSettings.setLocale(AppLocale.es),
+          ),
+          _LanguageTile(
+            label: t.settings.langEn,
+            selected: current == 'en',
+            onTap: () => LocaleSettings.setLocale(AppLocale.en),
+          ),
+          ListTile(
+            leading: const Icon(Icons.smartphone_outlined),
+            title: Text(t.settings.systemLanguage),
+            onTap: () => LocaleSettings.useDeviceLocale(),
+          ),
+          const Divider(),
+          _SectionHeader(t.settings.about),
+          ListTile(
+            leading: Image.asset('assets/logo.png', width: 32),
+            title: Text(t.app.title),
+            subtitle: Text(t.settings.aboutText),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _SectionHeader extends StatelessWidget {
+  const _SectionHeader(this.text);
+
+  final String text;
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(16, 16, 16, 4),
+      child: Text(
+        text,
+        style: Theme.of(context).textTheme.titleSmall?.copyWith(
+          color: seedGreenDark,
+          fontWeight: FontWeight.w600,
+        ),
+      ),
+    );
+  }
+}
+
+class _LanguageTile extends StatelessWidget {
+  const _LanguageTile({
+    required this.label,
+    required this.selected,
+    required this.onTap,
+  });
+
+  final String label;
+  final bool selected;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      title: Text(label),
+      trailing: selected ? const Icon(Icons.check, color: seedGreen) : null,
+      onTap: onTap,
+    );
+  }
+}