Merge branch 'claude/nostalgic-wright-acfc25': inline offer photos

Market offers carry a small base64 data-URI thumbnail embedded in the Nostr
event (no media server); full photo stays in the encrypted inventory. Blossom
alternative parked on branch parked/offer-photos-blossom.

# Conflicts:
#	apps/app_seeds/lib/i18n/strings.g.dart

apps/app_seeds/test/ui/market_offer_detail_screen_test.dart

@@ -6,6 +6,7 @@ import 'package:tane/i18n/strings.g.dart';
 import 'package:tane/services/social_service.dart';
 import 'package:tane/services/social_settings.dart';
 import 'package:tane/ui/market_offer_detail_screen.dart';
+import 'package:tane/ui/market_widgets.dart';
 
 import '../support/test_support.dart';
 
@@ -25,7 +26,7 @@ Widget _wrap(MarketOfferDetailScreen screen) {
   );
 }
 
-Offer _offer({bool organic = false}) => Offer(
+Offer _offer({bool organic = false, String? imageUrl}) => Offer(
       id: 'lot-1',
       authorPubkeyHex: 'ab' * 32,
       summary: 'Tomate rosa de Barbastro',
@@ -33,6 +34,7 @@ Offer _offer({bool organic = false}) => Offer(
       category: 'Solanaceae',
       approxGeohash: 'sp3e9',
       isOrganic: organic,
+      imageUrl: imageUrl,
     );
 
 void main() {
@@ -70,4 +72,34 @@ void main() {
 
     expect(find.byKey(const Key('offerDetail.contact')), findsNothing);
   });
+
+  testWidgets('shows a hero image when the offer has a photo', (tester) async {
+    final social = await SocialService.fromRootSeedHex('00' * 32);
+    final settings = SocialSettings(InMemorySecretStore());
+    await settings.setRelayUrls(const []);
+
+    await tester.pumpWidget(_wrap(MarketOfferDetailScreen(
+      offer: _offer(imageUrl: 'https://media.example/abc.jpg'),
+      social: social,
+      settings: settings,
+    )));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(OfferHeroImage), findsOneWidget);
+  });
+
+  testWidgets('shows no hero image when the offer has none', (tester) async {
+    final social = await SocialService.fromRootSeedHex('00' * 32);
+    final settings = SocialSettings(InMemorySecretStore());
+    await settings.setRelayUrls(const []);
+
+    await tester.pumpWidget(_wrap(MarketOfferDetailScreen(
+      offer: _offer(),
+      social: social,
+      settings: settings,
+    )));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(OfferHeroImage), findsNothing);
+  });
 }

apps/app_seeds/test/ui/market_widgets_test.dart

@@ -0,0 +1,62 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tane/ui/market_widgets.dart';
+
+Widget _wrap(Widget child) => MaterialApp(home: Scaffold(body: Center(child: child)));
+
+/// A 1×1 PNG as an inline data URI — the shape offers actually publish.
+const _dataUri =
+    'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lE'
+    'QVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==';
+
+void main() {
+  testWidgets('OfferThumbnail renders an inline data-URI from memory',
+      (tester) async {
+    await tester.pumpWidget(
+      _wrap(const OfferThumbnail(url: _dataUri, semanticLabel: 'Photo')),
+    );
+    await tester.pump();
+
+    expect(find.byType(Image), findsOneWidget);
+    // Decoded fine — no broken-image placeholder.
+    expect(find.byIcon(Icons.image_not_supported_outlined), findsNothing);
+  });
+
+  testWidgets('OfferThumbnail builds a network image', (tester) async {
+    await tester.pumpWidget(
+      _wrap(const OfferThumbnail(
+        url: 'https://media.example/abc.jpg',
+        semanticLabel: 'Photo',
+      )),
+    );
+    // The image widget is present; its loadingBuilder/errorBuilder handle the
+    // remote fetch, so we only assert the widget is wired (no network in tests).
+    expect(find.byType(Image), findsOneWidget);
+  });
+
+  testWidgets('OfferThumbnail falls back to a placeholder when the load fails',
+      (tester) async {
+    await tester.pumpWidget(
+      _wrap(const OfferThumbnail(
+        url: 'https://media.example/missing.jpg',
+        semanticLabel: 'Photo',
+      )),
+    );
+    // Let the (failed) network fetch resolve; the errorBuilder then shows a
+    // neutral icon instead of a broken image.
+    await tester.pump();
+    await tester.pump(const Duration(seconds: 1));
+
+    expect(find.byIcon(Icons.image_not_supported_outlined), findsOneWidget);
+  });
+
+  testWidgets('OfferHeroImage builds a network image', (tester) async {
+    await tester.pumpWidget(
+      _wrap(const OfferHeroImage(
+        url: 'https://media.example/abc.jpg',
+        semanticLabel: 'Photo',
+      )),
+    );
+    expect(find.byType(Image), findsOneWidget);
+  });
+}