feat(offers): asking price on lots, published with sale offers (schema v11)

The data model always meant sale offers to carry an informational price
(data-model §2.8, sharing-model §4.4); with offer state collapsed onto
the Lot, the price lives there. Null amount on a sell lot = 'to be
agreed' — the NIP-99 event simply omits the price tag.

- schema v11: Lots.price_amount/price_currency, guarded migration,
  schema dump + generated schema_v11 for the round-trip test
- ShareableLot/VarietyLot carry the price (sell-only in shareableLots);
  addLot/updateLot persist it and clear it when the lot leaves sale
- OffersCubit.publishLots forwards it (outbox flush picks it up free)
- lot sheet: price + currency inputs revealed only on 'For sale', with
  the €/Ğ1/hours quick-picks extracted to a shared CurrencyQuickPicks
  widget (reused by the sale sheet)
- backup JSON round-trips the new columns
- i18n share.price/priceHint in en/es/pt/ast

apps/app_seeds/lib/data/export_import/inventory_json_codec.dart

@@ -79,6 +79,8 @@ class InventoryJsonCodec {
             'originPlace': l.originPlace,
             'abundance': l.abundance?.name,
             'preservationFormat': l.preservationFormat?.name,
+            'priceAmount': l.priceAmount,
+            'priceCurrency': l.priceCurrency,
           },
       ],
       'vernacularNames': [
@@ -338,6 +340,8 @@ class InventoryJsonCodec {
             PreservationFormat.values,
             m['preservationFormat'],
           ),
+          priceAmount: (m['priceAmount'] as num?)?.toDouble(),
+          priceCurrency: m['priceCurrency'] as String?,
         );
       }),
       vernacularNames: _rows(root, 'vernacularNames', (m) {

apps/app_seeds/lib/data/variety_repository.dart

@@ -226,6 +226,8 @@ class ShareableLot extends Equatable {
     this.category,
     this.harvestYear,
     this.isOrganic = false,
+    this.priceAmount,
+    this.priceCurrency,
   });
 
   final String lotId;
@@ -246,9 +248,23 @@ class ShareableLot extends Equatable {
   /// filter the market for it.
   final bool isOrganic;
 
+  /// Asking price, only populated for [OfferStatus.sell] lots. Null amount on
+  /// a sale means "price to be agreed" — the offer publishes without a price.
+  final double? priceAmount;
+  final String? priceCurrency;
+
   @override
-  List<Object?> get props =>
+  List<Object?> get props => [
-      [lotId, varietyId, summary, offerStatus, category, harvestYear, isOrganic];
+    lotId,
+    varietyId,
+    summary,
+    offerStatus,
+    category,
+    harvestYear,
+    isOrganic,
+    priceAmount,
+    priceCurrency,
+  ];
 }
 
 /// One germination test on a lot; [rate] is derived (0..1), null when it can't
@@ -322,6 +338,8 @@ class VarietyLot extends Equatable {
     this.abundance,
     this.preservationFormat,
     this.offerStatus = OfferStatus.private,
+    this.priceAmount,
+    this.priceCurrency,
     this.germinationTests = const [],
     this.conditionChecks = const [],
   });
@@ -354,6 +372,11 @@ class VarietyLot extends Equatable {
   /// the network is Block 2.
   final OfferStatus offerStatus;
 
+  /// Asking price, meaningful when [offerStatus] is `sell`. Null amount means
+  /// "price to be agreed".
+  final double? priceAmount;
+  final String? priceCurrency;
+
   final List<GerminationEntry> germinationTests;
 
   /// Storage-condition checks, most-recent first (`conditionChecks.first` = last).
@@ -377,6 +400,8 @@ class VarietyLot extends Equatable {
     abundance,
     preservationFormat,
     offerStatus,
+    priceAmount,
+    priceCurrency,
     germinationTests,
     conditionChecks,
   ];
@@ -1281,9 +1306,12 @@ class VarietyRepository {
     Abundance? abundance,
     PreservationFormat? preservationFormat,
     OfferStatus offerStatus = OfferStatus.private,
+    double? priceAmount,
+    String? priceCurrency,
   }) async {
     final (created, updated) = await _stamp();
     final id = idGen.newId();
+    final forSale = offerStatus == OfferStatus.sell;
     await _db
         .into(_db.lots)
         .insert(
@@ -1306,6 +1334,8 @@ class VarietyRepository {
             abundance: Value(abundance),
             preservationFormat: Value(preservationFormat),
             offerStatus: Value(offerStatus),
+            priceAmount: Value(forSale ? priceAmount : null),
+            priceCurrency: Value(forSale ? priceCurrency : null),
           ),
         );
     return id;
@@ -1326,8 +1356,13 @@ class VarietyRepository {
     Abundance? abundance,
     PreservationFormat? preservationFormat,
     OfferStatus offerStatus = OfferStatus.private,
+    double? priceAmount,
+    String? priceCurrency,
   }) async {
     final (_, updated) = await _stamp();
+    // Price only makes sense on a lot offered for sale; clearing the sale
+    // status clears the price with it.
+    final forSale = offerStatus == OfferStatus.sell;
     await (_db.update(_db.lots)..where((l) => l.id.equals(lotId))).write(
       LotsCompanion(
         type: Value(type),
@@ -1343,6 +1378,8 @@ class VarietyRepository {
         abundance: Value(abundance),
         preservationFormat: Value(preservationFormat),
         offerStatus: Value(offerStatus),
+        priceAmount: Value(forSale ? priceAmount : null),
+        priceCurrency: Value(forSale ? priceCurrency : null),
         updatedAt: Value(updated),
         lastAuthor: Value(nodeId),
       ),
@@ -1580,6 +1617,12 @@ class VarietyRepository {
             category: v.category,
             harvestYear: l.harvestYear,
             isOrganic: v.isOrganic,
+            priceAmount: l.offerStatus == OfferStatus.sell
+                ? l.priceAmount
+                : null,
+            priceCurrency: l.offerStatus == OfferStatus.sell
+                ? l.priceCurrency
+                : null,
           ),
     ];
   }
@@ -2363,6 +2406,8 @@ class VarietyRepository {
       abundance: l.abundance,
       preservationFormat: l.preservationFormat,
       offerStatus: l.offerStatus,
+      priceAmount: l.priceAmount,
+      priceCurrency: l.priceCurrency,
       germinationTests: germinationTests,
       conditionChecks: conditionChecks,
       quantity: hasQuantity

apps/app_seeds/lib/db/database.dart

@@ -31,7 +31,7 @@ class AppDatabase extends _$AppDatabase {
 
   /// Current schema version; also stamped into interchange exports so an
   /// importer knows which app generation wrote the file (data-model §7).
-  static const int currentSchemaVersion = 10;
+  static const int currentSchemaVersion = 11;
 
   @override
   int get schemaVersion => currentSchemaVersion;
@@ -153,6 +153,16 @@ class AppDatabase extends _$AppDatabase {
           await m.createTable(sales);
         }
       }
+      // v11: asking price on Lots — published with "sell" market offers.
+      // Guarded (see the v7 note above).
+      if (from < 11) {
+        if (!await _hasColumn('lots', 'price_amount')) {
+          await m.addColumn(lots, lots.priceAmount);
+        }
+        if (!await _hasColumn('lots', 'price_currency')) {
+          await m.addColumn(lots, lots.priceCurrency);
+        }
+      }
     },
   );
 

apps/app_seeds/lib/db/database.g.dart

@@ -3266,6 +3266,28 @@ class $LotsTable extends Lots with TableInfo<$LotsTable, Lot> {
       ).withConverter<PreservationFormat?>(
         $LotsTable.$converterpreservationFormatn,
       );
+  static const VerificationMeta _priceAmountMeta = const VerificationMeta(
+    'priceAmount',
+  );
+  @override
+  late final GeneratedColumn<double> priceAmount = GeneratedColumn<double>(
+    'price_amount',
+    aliasedName,
+    true,
+    type: DriftSqlType.double,
+    requiredDuringInsert: false,
+  );
+  static const VerificationMeta _priceCurrencyMeta = const VerificationMeta(
+    'priceCurrency',
+  );
+  @override
+  late final GeneratedColumn<String> priceCurrency = GeneratedColumn<String>(
+    'price_currency',
+    aliasedName,
+    true,
+    type: DriftSqlType.string,
+    requiredDuringInsert: false,
+  );
   @override
   List<GeneratedColumn> get $columns => [
     id,
@@ -3289,6 +3311,8 @@ class $LotsTable extends Lots with TableInfo<$LotsTable, Lot> {
     originPlace,
     abundance,
     preservationFormat,
+    priceAmount,
+    priceCurrency,
   ];
   @override
   String get aliasedName => _alias ?? actualTableName;
@@ -3429,6 +3453,24 @@ class $LotsTable extends Lots with TableInfo<$LotsTable, Lot> {
         ),
       );
     }
+    if (data.containsKey('price_amount')) {
+      context.handle(
+        _priceAmountMeta,
+        priceAmount.isAcceptableOrUnknown(
+          data['price_amount']!,
+          _priceAmountMeta,
+        ),
+      );
+    }
+    if (data.containsKey('price_currency')) {
+      context.handle(
+        _priceCurrencyMeta,
+        priceCurrency.isAcceptableOrUnknown(
+          data['price_currency']!,
+          _priceCurrencyMeta,
+        ),
+      );
+    }
     return context;
   }
 
@@ -3532,6 +3574,14 @@ class $LotsTable extends Lots with TableInfo<$LotsTable, Lot> {
           data['${effectivePrefix}preservation_format'],
         ),
       ),
+      priceAmount: attachedDatabase.typeMapping.read(
+        DriftSqlType.double,
+        data['${effectivePrefix}price_amount'],
+      ),
+      priceCurrency: attachedDatabase.typeMapping.read(
+        DriftSqlType.string,
+        data['${effectivePrefix}price_currency'],
+      ),
     );
   }
 
@@ -3600,6 +3650,17 @@ class Lot extends DataClass implements Insertable<Lot> {
   /// How the (seed) lot is physically conserved — see [PreservationFormat].
   /// Distinct from [storageLocation]. Optional.
   final PreservationFormat? preservationFormat;
+
+  /// Asking price when [offerStatus] is `sell` (data-model §2.8 puts price on
+  /// the Offer; with offer state collapsed onto the Lot, it lives here and is
+  /// published with the market offer). Informational only — money changes
+  /// hands off-platform, never in-app. Null amount on a sell lot means
+  /// "price to be agreed" (the offer publishes without a price).
+  final double? priceAmount;
+
+  /// Free-text currency, like [Sales.currency]: "€", "Ğ1", a local/time
+  /// currency. Never assumed (sharing-model §6).
+  final String? priceCurrency;
   const Lot({
     required this.id,
     required this.createdAt,
@@ -3622,6 +3683,8 @@ class Lot extends DataClass implements Insertable<Lot> {
     this.originPlace,
     this.abundance,
     this.preservationFormat,
+    this.priceAmount,
+    this.priceCurrency,
   });
   @override
   Map<String, Expression> toColumns(bool nullToAbsent) {
@@ -3683,6 +3746,12 @@ class Lot extends DataClass implements Insertable<Lot> {
         $LotsTable.$converterpreservationFormatn.toSql(preservationFormat),
       );
     }
+    if (!nullToAbsent || priceAmount != null) {
+      map['price_amount'] = Variable<double>(priceAmount);
+    }
+    if (!nullToAbsent || priceCurrency != null) {
+      map['price_currency'] = Variable<String>(priceCurrency);
+    }
     return map;
   }
 
@@ -3733,6 +3802,12 @@ class Lot extends DataClass implements Insertable<Lot> {
       preservationFormat: preservationFormat == null && nullToAbsent
           ? const Value.absent()
           : Value(preservationFormat),
+      priceAmount: priceAmount == null && nullToAbsent
+          ? const Value.absent()
+          : Value(priceAmount),
+      priceCurrency: priceCurrency == null && nullToAbsent
+          ? const Value.absent()
+          : Value(priceCurrency),
     );
   }
 
@@ -3773,6 +3848,8 @@ class Lot extends DataClass implements Insertable<Lot> {
       preservationFormat: $LotsTable.$converterpreservationFormatn.fromJson(
         serializer.fromJson<String?>(json['preservationFormat']),
       ),
+      priceAmount: serializer.fromJson<double?>(json['priceAmount']),
+      priceCurrency: serializer.fromJson<String?>(json['priceCurrency']),
     );
   }
   @override
@@ -3808,6 +3885,8 @@ class Lot extends DataClass implements Insertable<Lot> {
       'preservationFormat': serializer.toJson<String?>(
         $LotsTable.$converterpreservationFormatn.toJson(preservationFormat),
       ),
+      'priceAmount': serializer.toJson<double?>(priceAmount),
+      'priceCurrency': serializer.toJson<String?>(priceCurrency),
     };
   }
 
@@ -3833,6 +3912,8 @@ class Lot extends DataClass implements Insertable<Lot> {
     Value<String?> originPlace = const Value.absent(),
     Value<Abundance?> abundance = const Value.absent(),
     Value<PreservationFormat?> preservationFormat = const Value.absent(),
+    Value<double?> priceAmount = const Value.absent(),
+    Value<String?> priceCurrency = const Value.absent(),
   }) => Lot(
     id: id ?? this.id,
     createdAt: createdAt ?? this.createdAt,
@@ -3863,6 +3944,10 @@ class Lot extends DataClass implements Insertable<Lot> {
     preservationFormat: preservationFormat.present
         ? preservationFormat.value
         : this.preservationFormat,
+    priceAmount: priceAmount.present ? priceAmount.value : this.priceAmount,
+    priceCurrency: priceCurrency.present
+        ? priceCurrency.value
+        : this.priceCurrency,
   );
   Lot copyWithCompanion(LotsCompanion data) {
     return Lot(
@@ -3915,6 +4000,12 @@ class Lot extends DataClass implements Insertable<Lot> {
       preservationFormat: data.preservationFormat.present
           ? data.preservationFormat.value
           : this.preservationFormat,
+      priceAmount: data.priceAmount.present
+          ? data.priceAmount.value
+          : this.priceAmount,
+      priceCurrency: data.priceCurrency.present
+          ? data.priceCurrency.value
+          : this.priceCurrency,
     );
   }
 
@@ -3941,7 +4032,9 @@ class Lot extends DataClass implements Insertable<Lot> {
           ..write('originName: $originName, ')
           ..write('originPlace: $originPlace, ')
           ..write('abundance: $abundance, ')
-          ..write('preservationFormat: $preservationFormat')
+          ..write('preservationFormat: $preservationFormat, ')
+          ..write('priceAmount: $priceAmount, ')
+          ..write('priceCurrency: $priceCurrency')
           ..write(')'))
         .toString();
   }
@@ -3969,6 +4062,8 @@ class Lot extends DataClass implements Insertable<Lot> {
     originPlace,
     abundance,
     preservationFormat,
+    priceAmount,
+    priceCurrency,
   ]);
   @override
   bool operator ==(Object other) =>
@@ -3994,7 +4089,9 @@ class Lot extends DataClass implements Insertable<Lot> {
           other.originName == this.originName &&
           other.originPlace == this.originPlace &&
           other.abundance == this.abundance &&
-          other.preservationFormat == this.preservationFormat);
+          other.preservationFormat == this.preservationFormat &&
+          other.priceAmount == this.priceAmount &&
+          other.priceCurrency == this.priceCurrency);
 }
 
 class LotsCompanion extends UpdateCompanion<Lot> {
@@ -4019,6 +4116,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
   final Value<String?> originPlace;
   final Value<Abundance?> abundance;
   final Value<PreservationFormat?> preservationFormat;
+  final Value<double?> priceAmount;
+  final Value<String?> priceCurrency;
   final Value<int> rowid;
   const LotsCompanion({
     this.id = const Value.absent(),
@@ -4042,6 +4141,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
     this.originPlace = const Value.absent(),
     this.abundance = const Value.absent(),
     this.preservationFormat = const Value.absent(),
+    this.priceAmount = const Value.absent(),
+    this.priceCurrency = const Value.absent(),
     this.rowid = const Value.absent(),
   });
   LotsCompanion.insert({
@@ -4066,6 +4167,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
     this.originPlace = const Value.absent(),
     this.abundance = const Value.absent(),
     this.preservationFormat = const Value.absent(),
+    this.priceAmount = const Value.absent(),
+    this.priceCurrency = const Value.absent(),
     this.rowid = const Value.absent(),
   }) : id = Value(id),
        createdAt = Value(createdAt),
@@ -4094,6 +4197,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
     Expression<String>? originPlace,
     Expression<String>? abundance,
     Expression<String>? preservationFormat,
+    Expression<double>? priceAmount,
+    Expression<String>? priceCurrency,
     Expression<int>? rowid,
   }) {
     return RawValuesInsertable({
@@ -4118,6 +4223,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
       if (originPlace != null) 'origin_place': originPlace,
       if (abundance != null) 'abundance': abundance,
       if (preservationFormat != null) 'preservation_format': preservationFormat,
+      if (priceAmount != null) 'price_amount': priceAmount,
+      if (priceCurrency != null) 'price_currency': priceCurrency,
       if (rowid != null) 'rowid': rowid,
     });
   }
@@ -4144,6 +4251,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
     Value<String?>? originPlace,
     Value<Abundance?>? abundance,
     Value<PreservationFormat?>? preservationFormat,
+    Value<double?>? priceAmount,
+    Value<String?>? priceCurrency,
     Value<int>? rowid,
   }) {
     return LotsCompanion(
@@ -4168,6 +4277,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
       originPlace: originPlace ?? this.originPlace,
       abundance: abundance ?? this.abundance,
       preservationFormat: preservationFormat ?? this.preservationFormat,
+      priceAmount: priceAmount ?? this.priceAmount,
+      priceCurrency: priceCurrency ?? this.priceCurrency,
       rowid: rowid ?? this.rowid,
     );
   }
@@ -4250,6 +4361,12 @@ class LotsCompanion extends UpdateCompanion<Lot> {
         ),
       );
     }
+    if (priceAmount.present) {
+      map['price_amount'] = Variable<double>(priceAmount.value);
+    }
+    if (priceCurrency.present) {
+      map['price_currency'] = Variable<String>(priceCurrency.value);
+    }
     if (rowid.present) {
       map['rowid'] = Variable<int>(rowid.value);
     }
@@ -4280,6 +4397,8 @@ class LotsCompanion extends UpdateCompanion<Lot> {
           ..write('originPlace: $originPlace, ')
           ..write('abundance: $abundance, ')
           ..write('preservationFormat: $preservationFormat, ')
+          ..write('priceAmount: $priceAmount, ')
+          ..write('priceCurrency: $priceCurrency, ')
           ..write('rowid: $rowid')
           ..write(')'))
         .toString();
@@ -11663,6 +11782,8 @@ typedef $$LotsTableCreateCompanionBuilder =
       Value<String?> originPlace,
       Value<Abundance?> abundance,
       Value<PreservationFormat?> preservationFormat,
+      Value<double?> priceAmount,
+      Value<String?> priceCurrency,
       Value<int> rowid,
     });
 typedef $$LotsTableUpdateCompanionBuilder =
@@ -11688,6 +11809,8 @@ typedef $$LotsTableUpdateCompanionBuilder =
       Value<String?> originPlace,
       Value<Abundance?> abundance,
       Value<PreservationFormat?> preservationFormat,
+      Value<double?> priceAmount,
+      Value<String?> priceCurrency,
       Value<int> rowid,
     });
 
@@ -11812,6 +11935,16 @@ class $$LotsTableFilterComposer extends Composer<_$AppDatabase, $LotsTable> {
     column: $table.preservationFormat,
     builder: (column) => ColumnWithTypeConverterFilters(column),
   );
+
+  ColumnFilters<double> get priceAmount => $composableBuilder(
+    column: $table.priceAmount,
+    builder: (column) => ColumnFilters(column),
+  );
+
+  ColumnFilters<String> get priceCurrency => $composableBuilder(
+    column: $table.priceCurrency,
+    builder: (column) => ColumnFilters(column),
+  );
 }
 
 class $$LotsTableOrderingComposer extends Composer<_$AppDatabase, $LotsTable> {
@@ -11926,6 +12059,16 @@ class $$LotsTableOrderingComposer extends Composer<_$AppDatabase, $LotsTable> {
     column: $table.preservationFormat,
     builder: (column) => ColumnOrderings(column),
   );
+
+  ColumnOrderings<double> get priceAmount => $composableBuilder(
+    column: $table.priceAmount,
+    builder: (column) => ColumnOrderings(column),
+  );
+
+  ColumnOrderings<String> get priceCurrency => $composableBuilder(
+    column: $table.priceCurrency,
+    builder: (column) => ColumnOrderings(column),
+  );
 }
 
 class $$LotsTableAnnotationComposer
@@ -12030,6 +12173,16 @@ class $$LotsTableAnnotationComposer
     column: $table.preservationFormat,
     builder: (column) => column,
   );
+
+  GeneratedColumn<double> get priceAmount => $composableBuilder(
+    column: $table.priceAmount,
+    builder: (column) => column,
+  );
+
+  GeneratedColumn<String> get priceCurrency => $composableBuilder(
+    column: $table.priceCurrency,
+    builder: (column) => column,
+  );
 }
 
 class $$LotsTableTableManager
@@ -12082,6 +12235,8 @@ class $$LotsTableTableManager
                 Value<Abundance?> abundance = const Value.absent(),
                 Value<PreservationFormat?> preservationFormat =
                     const Value.absent(),
+                Value<double?> priceAmount = const Value.absent(),
+                Value<String?> priceCurrency = const Value.absent(),
                 Value<int> rowid = const Value.absent(),
               }) => LotsCompanion(
                 id: id,
@@ -12105,6 +12260,8 @@ class $$LotsTableTableManager
                 originPlace: originPlace,
                 abundance: abundance,
                 preservationFormat: preservationFormat,
+                priceAmount: priceAmount,
+                priceCurrency: priceCurrency,
                 rowid: rowid,
               ),
           createCompanionCallback:
@@ -12131,6 +12288,8 @@ class $$LotsTableTableManager
                 Value<Abundance?> abundance = const Value.absent(),
                 Value<PreservationFormat?> preservationFormat =
                     const Value.absent(),
+                Value<double?> priceAmount = const Value.absent(),
+                Value<String?> priceCurrency = const Value.absent(),
                 Value<int> rowid = const Value.absent(),
               }) => LotsCompanion.insert(
                 id: id,
@@ -12154,6 +12313,8 @@ class $$LotsTableTableManager
                 originPlace: originPlace,
                 abundance: abundance,
                 preservationFormat: preservationFormat,
+                priceAmount: priceAmount,
+                priceCurrency: priceCurrency,
                 rowid: rowid,
               ),
           withReferenceMapper: (p0) => p0

apps/app_seeds/lib/db/tables.dart

@@ -109,6 +109,17 @@ class Lots extends Table with SyncColumns {
   /// Distinct from [storageLocation]. Optional.
   TextColumn get preservationFormat =>
       textEnum<PreservationFormat>().nullable()();
+
+  /// Asking price when [offerStatus] is `sell` (data-model §2.8 puts price on
+  /// the Offer; with offer state collapsed onto the Lot, it lives here and is
+  /// published with the market offer). Informational only — money changes
+  /// hands off-platform, never in-app. Null amount on a sell lot means
+  /// "price to be agreed" (the offer publishes without a price).
+  RealColumn get priceAmount => real().nullable()();
+
+  /// Free-text currency, like [Sales.currency]: "€", "Ğ1", a local/time
+  /// currency. Never assumed (sharing-model §6).
+  TextColumn get priceCurrency => text().nullable()();
 }
 
 /// Optional germination history for a Lot; percent is derived in code.

apps/app_seeds/lib/i18n/ast.i18n.json

@@ -303,6 +303,8 @@
     "add": "¿Compártesla?",
     "title": "¿Compártesla?",
     "nudge": "Tienes a esgaya: podríes compartir un poco.",
+    "price": "Preciu",
+    "priceHint": "Déxalu baleru p'alcordalu depués",
     "private": "Namás pa min",
     "gift": "Pa regalar",
     "exchange": "Pa trocar",

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

@@ -304,6 +304,8 @@
     "add": "Do you share it?",
     "title": "Do you share it?",
     "nudge": "You have plenty — you could share some.",
+    "price": "Price",
+    "priceHint": "Leave it empty to agree it later",
     "private": "Just for me",
     "gift": "To give away",
     "exchange": "To swap",

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

@@ -303,6 +303,8 @@
     "add": "¿La compartes?",
     "title": "¿La compartes?",
     "nudge": "Tienes de sobra: podrías compartir un poco.",
+    "price": "Precio",
+    "priceHint": "Déjalo vacío para acordarlo luego",
     "private": "Solo para mí",
     "gift": "Para regalar",
     "exchange": "Para intercambiar",

apps/app_seeds/lib/i18n/pt.i18n.json

@@ -300,6 +300,8 @@
     "add": "Partilhas esta?",
     "title": "Partilhas esta?",
     "nudge": "Tens de sobra: podias partilhar um pouco.",
+    "price": "Preço",
+    "priceHint": "Deixa vazio para combinar depois",
     "private": "Só para mim",
     "gift": "Para dar",
     "exchange": "Para trocar",

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

@@ -4,9 +4,9 @@
 /// To regenerate, run: `dart run slang`
 ///
 /// Locales: 4
-/// Strings: 1968 (492 per locale)
+/// Strings: 1976 (494 per locale)
 ///
-/// Built on 2026-07-11 at 05:50 UTC
+/// Built on 2026-07-11 at 06:00 UTC
 
 // coverage:ignore-file
 // ignore_for_file: type=lint, unused_import

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

@@ -547,6 +547,8 @@ class _Translations$share$ast extends Translations$share$en {
 	@override String get add => '¿Compártesla?';
 	@override String get title => '¿Compártesla?';
 	@override String get nudge => 'Tienes a esgaya: podríes compartir un poco.';
+	@override String get price => 'Preciu';
+	@override String get priceHint => 'Déxalu baleru p\'alcordalu depués';
 	@override String get private => 'Namás pa min';
 	@override String get gift => 'Pa regalar';
 	@override String get exchange => 'Pa trocar';
@@ -1501,6 +1503,8 @@ extension on TranslationsAst {
 			'share.add' => '¿Compártesla?',
 			'share.title' => '¿Compártesla?',
 			'share.nudge' => 'Tienes a esgaya: podríes compartir un poco.',
+			'share.price' => 'Preciu',
+			'share.priceHint' => 'Déxalu baleru p\'alcordalu depués',
 			'share.private' => 'Namás pa min',
 			'share.gift' => 'Pa regalar',
 			'share.exchange' => 'Pa trocar',

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

@@ -988,6 +988,12 @@ class Translations$share$en {
 	/// en: 'You have plenty — you could share some.'
 	String get nudge => 'You have plenty — you could share some.';
 
+	/// en: 'Price'
+	String get price => 'Price';
+
+	/// en: 'Leave it empty to agree it later'
+	String get priceHint => 'Leave it empty to agree it later';
+
 	/// en: 'Just for me'
 	String get private => 'Just for me';
 
@@ -2473,6 +2479,8 @@ extension on Translations {
 			'share.add' => 'Do you share it?',
 			'share.title' => 'Do you share it?',
 			'share.nudge' => 'You have plenty — you could share some.',
+			'share.price' => 'Price',
+			'share.priceHint' => 'Leave it empty to agree it later',
 			'share.private' => 'Just for me',
 			'share.gift' => 'To give away',
 			'share.exchange' => 'To swap',

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

@@ -547,6 +547,8 @@ class _Translations$share$es extends Translations$share$en {
 	@override String get add => '¿La compartes?';
 	@override String get title => '¿La compartes?';
 	@override String get nudge => 'Tienes de sobra: podrías compartir un poco.';
+	@override String get price => 'Precio';
+	@override String get priceHint => 'Déjalo vacío para acordarlo luego';
 	@override String get private => 'Solo para mí';
 	@override String get gift => 'Para regalar';
 	@override String get exchange => 'Para intercambiar';
@@ -1503,6 +1505,8 @@ extension on TranslationsEs {
 			'share.add' => '¿La compartes?',
 			'share.title' => '¿La compartes?',
 			'share.nudge' => 'Tienes de sobra: podrías compartir un poco.',
+			'share.price' => 'Precio',
+			'share.priceHint' => 'Déjalo vacío para acordarlo luego',
 			'share.private' => 'Solo para mí',
 			'share.gift' => 'Para regalar',
 			'share.exchange' => 'Para intercambiar',

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

@@ -544,6 +544,8 @@ class _Translations$share$pt extends Translations$share$en {
 	@override String get add => 'Partilhas esta?';
 	@override String get title => 'Partilhas esta?';
 	@override String get nudge => 'Tens de sobra: podias partilhar um pouco.';
+	@override String get price => 'Preço';
+	@override String get priceHint => 'Deixa vazio para combinar depois';
 	@override String get private => 'Só para mim';
 	@override String get gift => 'Para dar';
 	@override String get exchange => 'Para trocar';
@@ -1497,6 +1499,8 @@ extension on TranslationsPt {
 			'share.add' => 'Partilhas esta?',
 			'share.title' => 'Partilhas esta?',
 			'share.nudge' => 'Tens de sobra: podias partilhar um pouco.',
+			'share.price' => 'Preço',
+			'share.priceHint' => 'Deixa vazio para combinar depois',
 			'share.private' => 'Só para mim',
 			'share.gift' => 'Para dar',
 			'share.exchange' => 'Para trocar',

apps/app_seeds/lib/state/offers_cubit.dart

@@ -284,6 +284,8 @@ class OffersCubit extends Cubit<OffersState> {
           areaGeohash: areaGeohash,
           category: lot.category,
           isOrganic: lot.isOrganic,
+          priceAmount: lot.priceAmount,
+          priceCurrency: lot.priceCurrency,
           imageUrl: await _coverThumbnail(lot.varietyId),
         );
         final result = await transport.publish(offer);

apps/app_seeds/lib/state/variety_detail_cubit.dart

@@ -81,6 +81,8 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     Abundance? abundance,
     PreservationFormat? preservationFormat,
     OfferStatus offerStatus = OfferStatus.private,
+    double? priceAmount,
+    String? priceCurrency,
   }) => _repo.addLot(
     varietyId: varietyId,
     type: type,
@@ -93,6 +95,8 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     abundance: abundance,
     preservationFormat: preservationFormat,
     offerStatus: offerStatus,
+    priceAmount: priceAmount,
+    priceCurrency: priceCurrency,
   );
 
   Future<void> updateLot({
@@ -107,6 +111,8 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     Abundance? abundance,
     PreservationFormat? preservationFormat,
     OfferStatus offerStatus = OfferStatus.private,
+    double? priceAmount,
+    String? priceCurrency,
   }) => _repo.updateLot(
     lotId: lotId,
     type: type,
@@ -119,6 +125,8 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     abundance: abundance,
     preservationFormat: preservationFormat,
     offerStatus: offerStatus,
+    priceAmount: priceAmount,
+    priceCurrency: priceCurrency,
   );
 
   Future<void> deleteLot(String lotId) => _repo.softDeleteLot(lotId);

apps/app_seeds/lib/ui/currency_quick_picks.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+import '../i18n/strings.g.dart';
+
+/// One-tap currency chips bound to a free-text [controller]. Ğ1 sits quietly
+/// among the familiar ones — offered, never imposed — and free text still
+/// takes anything else (sharing-model §6). Shared by the sale sheet, the lot
+/// price field and the hand-over sheet so every money-ish input feels the same.
+class CurrencyQuickPicks extends StatelessWidget {
+  const CurrencyQuickPicks({
+    required this.controller,
+    required this.keyPrefix,
+    required this.onChanged,
+    super.key,
+  });
+
+  final TextEditingController controller;
+
+  /// Namespaces the chip [Key]s (e.g. `sale` → `sale.currencyChip.€`).
+  final String keyPrefix;
+
+  /// Fires after a chip toggles the controller text (for `setState`).
+  final VoidCallback onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    final t = context.t;
+    return Wrap(
+      spacing: 8,
+      children: [
+        for (final c in ['€', 'Ğ1', t.sale.hours])
+          ChoiceChip(
+            key: Key('$keyPrefix.currencyChip.$c'),
+            label: Text(c),
+            selected: controller.text.trim() == c,
+            onSelected: (sel) {
+              controller.text = sel ? c : '';
+              onChanged();
+            },
+          ),
+      ],
+    );
+  }
+}

apps/app_seeds/lib/ui/sale_sheet.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import '../data/variety_repository.dart';
 import '../db/enums.dart';
 import '../i18n/strings.g.dart';
+import 'currency_quick_picks.dart';
 import 'theme.dart';
 
 /// Opens the "record a sale" sheet. Optionally pre-attached to [varietyId]
@@ -140,22 +141,10 @@ class _SaleSheetState extends State<_SaleSheet> {
               ],
             ),
             const SizedBox(height: 8),
-            // Quick picks so a currency is one tap. Ğ1 sits quietly among the
+            CurrencyQuickPicks(
-            // familiar ones — offered, never imposed — and free text still takes
+              controller: _currency,
-            // anything else.
+              keyPrefix: 'sale',
-            Wrap(
+              onChanged: () => setState(() {}),
-              spacing: 8,
-              children: [
-                for (final c in ['€', 'Ğ1', t.sale.hours])
-                  ChoiceChip(
-                    key: Key('sale.currencyChip.$c'),
-                    label: Text(c),
-                    selected: _currency.text.trim() == c,
-                    onSelected: (sel) => setState(() {
-                      _currency.text = sel ? c : '';
-                    }),
-                  ),
-              ],
             ),
             const SizedBox(height: 12),
             TextField(

apps/app_seeds/lib/ui/variety_detail_screen.dart

@@ -16,6 +16,7 @@ import '../domain/seed_viability.dart';
 import '../domain/species_reference_links.dart';
 import '../i18n/strings.g.dart';
 import '../state/variety_detail_cubit.dart';
+import 'currency_quick_picks.dart';
 import 'harvest_date_picker.dart';
 import 'photo_pick.dart';
 import 'plantare_sheet.dart';
@@ -1464,6 +1465,18 @@ Future<void> _showLotSheet(
       existing?.originName != null || existing?.originPlace != null;
   var showAbundance = existing?.abundance != null;
   var showShare = selectedShare != OfferStatus.private;
+  final existingPrice = existing?.priceAmount;
+  final priceAmountCtrl = TextEditingController(
+    // Drop a trailing .0 so the field shows "5", not "5.0".
+    text: existingPrice == null
+        ? ''
+        : (existingPrice == existingPrice.roundToDouble()
+              ? existingPrice.toInt().toString()
+              : existingPrice.toString()),
+  );
+  final priceCurrencyCtrl = TextEditingController(
+    text: existing?.priceCurrency ?? '',
+  );
   return showModalBottomSheet<void>(
     context: context,
     isScrollControlled: true,
@@ -1660,6 +1673,49 @@ Future<void> _showLotSheet(
                             style: Theme.of(sheetContext).textTheme.bodySmall,
                           ),
                         ),
+                      // Price only when selling — informational, agreed and
+                      // paid off-app. Empty amount = "to be agreed".
+                      if (selectedShare == OfferStatus.sell) ...[
+                        const SizedBox(height: 12),
+                        Row(
+                          crossAxisAlignment: CrossAxisAlignment.start,
+                          children: [
+                            Expanded(
+                              child: TextField(
+                                key: const Key('lot.priceAmount'),
+                                controller: priceAmountCtrl,
+                                keyboardType:
+                                    const TextInputType.numberWithOptions(
+                                      decimal: true,
+                                    ),
+                                decoration: InputDecoration(
+                                  labelText: t.share.price,
+                                  helperText: t.share.priceHint,
+                                  border: const OutlineInputBorder(),
+                                ),
+                              ),
+                            ),
+                            const SizedBox(width: 12),
+                            Expanded(
+                              child: TextField(
+                                key: const Key('lot.priceCurrency'),
+                                controller: priceCurrencyCtrl,
+                                decoration: InputDecoration(
+                                  labelText: t.sale.currency,
+                                  border: const OutlineInputBorder(),
+                                ),
+                                onChanged: (_) => setState(() {}),
+                              ),
+                            ),
+                          ],
+                        ),
+                        const SizedBox(height: 8),
+                        CurrencyQuickPicks(
+                          controller: priceCurrencyCtrl,
+                          keyPrefix: 'lot',
+                          onChanged: () => setState(() {}),
+                        ),
+                      ],
                     ],
                     // Layer 2: advanced seed-bank details, collapsed by default.
                     // Only for seed lots, and (condition checks) an existing lot.
@@ -1710,6 +1766,10 @@ Future<void> _showLotSheet(
                   onPressed: () {
                     final originName = _nullIfBlank(originNameCtrl.text);
                     final originPlace = _nullIfBlank(originPlaceCtrl.text);
+                    final priceAmount = double.tryParse(
+                      priceAmountCtrl.text.replaceAll(',', '.').trim(),
+                    );
+                    final priceCurrency = _nullIfBlank(priceCurrencyCtrl.text);
                     if (editing) {
                       cubit.updateLot(
                         lotId: existing.id,
@@ -1723,6 +1783,8 @@ Future<void> _showLotSheet(
                         abundance: selectedAbundance,
                         preservationFormat: selectedPreservation,
                         offerStatus: selectedShare,
+                        priceAmount: priceAmount,
+                        priceCurrency: priceCurrency,
                       );
                     } else {
                       cubit.addLot(
@@ -1736,6 +1798,8 @@ Future<void> _showLotSheet(
                         abundance: selectedAbundance,
                         preservationFormat: selectedPreservation,
                         offerStatus: selectedShare,
+                        priceAmount: priceAmount,
+                        priceCurrency: priceCurrency,
                       );
                     }
                     Navigator.of(sheetContext).pop();

apps/app_seeds/test/data/shareable_lots_test.dart

@@ -40,4 +40,71 @@ void main() {
     final lots = await repo.shareableLots();
     expect(lots.where((l) => l.lotId == privateId), isEmpty);
   });
+
+  test('sell lots expose their asking price; other statuses never do',
+      () async {
+    final repo = newTestRepository(db);
+    final varietyId = await repo.addQuickVariety(label: 'Calabaza');
+    final sellId = await repo.addLot(
+      varietyId: varietyId,
+      offerStatus: OfferStatus.sell,
+      priceAmount: 3.5,
+      priceCurrency: 'Ğ1',
+    );
+    // Price passed on a gift lot is dropped, not stored.
+    final giftId = await repo.addLot(
+      varietyId: varietyId,
+      offerStatus: OfferStatus.shared,
+      priceAmount: 99,
+      priceCurrency: '€',
+    );
+
+    final lots = await repo.shareableLots();
+    final sell = lots.singleWhere((l) => l.lotId == sellId);
+    expect(sell.priceAmount, 3.5);
+    expect(sell.priceCurrency, 'Ğ1');
+    final gift = lots.singleWhere((l) => l.lotId == giftId);
+    expect(gift.priceAmount, isNull);
+    expect(gift.priceCurrency, isNull);
+  });
+
+  test('a sell lot without amount is "to be agreed" — shareable, no price',
+      () async {
+    final repo = newTestRepository(db);
+    final varietyId = await repo.addQuickVariety(label: 'Lechuga');
+    final sellId = await repo.addLot(
+      varietyId: varietyId,
+      offerStatus: OfferStatus.sell,
+    );
+
+    final lots = await repo.shareableLots();
+    final sell = lots.singleWhere((l) => l.lotId == sellId);
+    expect(sell.priceAmount, isNull);
+  });
+
+  test('moving a lot out of sale clears its stored price', () async {
+    final repo = newTestRepository(db);
+    final varietyId = await repo.addQuickVariety(label: 'Haba');
+    final lotId = await repo.addLot(
+      varietyId: varietyId,
+      offerStatus: OfferStatus.sell,
+      priceAmount: 2,
+      priceCurrency: '€',
+    );
+
+    await repo.updateLot(
+      lotId: lotId,
+      type: LotType.seed,
+      offerStatus: OfferStatus.shared,
+      // Price args still sent by the form; must be ignored off-sale.
+      priceAmount: 2,
+      priceCurrency: '€',
+    );
+
+    final detail = await repo.watchVariety(varietyId).first;
+    final lot = detail!.lots.singleWhere((l) => l.id == lotId);
+    expect(lot.priceAmount, isNull);
+    expect(lot.priceCurrency, isNull);
+    expect(lot.offerStatus, OfferStatus.shared);
+  });
 }

apps/app_seeds/test/db/migration_test.dart

@@ -11,19 +11,19 @@ void main() {
     verifier = SchemaVerifier(GeneratedHelper());
   });
 
-  test('freshly created database matches the exported schema v10', () async {
+  test('freshly created database matches the exported schema v11', () async {
-    final schema = await verifier.schemaAt(10);
+    final schema = await verifier.schemaAt(11);
     final db = AppDatabase(schema.newConnection());
-    await verifier.migrateAndValidate(db, 10);
+    await verifier.migrateAndValidate(db, 11);
     await db.close();
   });
 
-  // Every historical version upgrades cleanly to the current schema (v10).
+  // Every historical version upgrades cleanly to the current schema (v11).
-  for (var from = 1; from <= 9; from++) {
+  for (var from = 1; from <= 10; from++) {
-    test('upgrades v$from → v10 and matches the fresh schema', () async {
+    test('upgrades v$from → v11 and matches the fresh schema', () async {
       final connection = await verifier.startAt(from);
       final db = AppDatabase(connection);
-      await verifier.migrateAndValidate(db, 10);
+      await verifier.migrateAndValidate(db, 11);
       await db.close();
     });
   }

apps/app_seeds/test/db/schema/schema.dart

@@ -14,6 +14,7 @@ import 'schema_v7.dart' as v7;
 import 'schema_v8.dart' as v8;
 import 'schema_v9.dart' as v9;
 import 'schema_v10.dart' as v10;
+import 'schema_v11.dart' as v11;
 
 class GeneratedHelper implements SchemaInstantiationHelper {
   @override
@@ -39,10 +40,12 @@ class GeneratedHelper implements SchemaInstantiationHelper {
         return v9.DatabaseAtV9(db);
       case 10:
         return v10.DatabaseAtV10(db);
+      case 11:
+        return v11.DatabaseAtV11(db);
       default:
         throw MissingSchemaException(version, versions);
     }
   }
 
-  static const versions = const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+  static const versions = const [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
 }

apps/app_seeds/test/state/offers_cubit_test.dart

@@ -294,6 +294,43 @@ void main() {
       await cubit.close();
     });
 
+    test('publishLots carries the lot asking price on sale offers', () async {
+      final transport = FakeOfferTransport();
+      final cubit = OffersCubit(transport);
+      await cubit.publishLots(
+        const [
+          ShareableLot(
+            lotId: 'lot-sale',
+            varietyId: 'var-1',
+            summary: 'Tomate',
+            offerStatus: OfferStatus.sell,
+            priceAmount: 3.5,
+            priceCurrency: 'Ğ1',
+          ),
+          // "To be agreed": sale without a figure publishes without a price.
+          ShareableLot(
+            lotId: 'lot-negotiable',
+            varietyId: 'var-2',
+            summary: 'Judía',
+            offerStatus: OfferStatus.sell,
+          ),
+        ],
+        authorPubkeyHex: 'ab' * 32,
+        areaGeohash: 'sp3e9',
+      );
+
+      await cubit.discover('sp3');
+      await pumpEventQueue();
+      final sale = cubit.state.offers.singleWhere((o) => o.id == 'lot-sale');
+      expect(sale.type, OfferType.sale);
+      expect(sale.priceAmount, 3.5);
+      expect(sale.priceCurrency, 'Ğ1');
+      final negotiable =
+          cubit.state.offers.singleWhere((o) => o.id == 'lot-negotiable');
+      expect(negotiable.priceAmount, isNull);
+      await cubit.close();
+    });
+
     test('publishLots embeds an inline thumbnail data-URI on the offer',
         () async {
       final transport = FakeOfferTransport();