feat: enhance recipe ingredient model; add raw fields and optional properties for better ingredient handling

flutter/lib/features/recipes/presentation/create_recipe_screen.dart

@@ -191,7 +191,6 @@ class _CreateRecipeScreenState extends ConsumerState<CreateRecipeScreen> {
     for (var i = 0; i < _parsed!.ingredients.length; i++) {
       if (!_included[i]) continue;
       final productId = _selectedProductIds[i];
-      if (productId == null) continue;
       final qty = double.tryParse(
             _qtyControllers[i]!.text.trim().replaceAll(',', '.'),
           ) ??
@@ -207,9 +206,11 @@ class _CreateRecipeScreenState extends ConsumerState<CreateRecipeScreen> {
               .toList()
           : <int>[];
       ingredients.add({
-        'productId': productId,
-        'quantity': qty,
-        'unit': unit,
+        'rawName': ing.rawName,
+        if ((ing.rawLine ?? '').trim().isNotEmpty) 'rawLine': ing.rawLine,
+        if (productId != null) 'productId': productId,
+        if (qty > 0) 'quantity': qty,
+        if (unit.isNotEmpty) 'unit': unit,
         if (note.isNotEmpty) 'note': note,
         if (alternativeProductIds.isNotEmpty)
           'alternativeProductIds': alternativeProductIds,

flutter/lib/features/recipes/presentation/recipe_detail_screen.dart

@@ -396,6 +396,10 @@ class _RecipeBody extends StatelessWidget {
             const SizedBox(height: 12),
             ...recipe.ingredients.map((ing) {
               final qtyStr = ing.quantity == 0 ? '' : _fmtQty(ing.quantity);
+              final ingredientLabel = (ing.rawName.trim().isNotEmpty
+                      ? ing.rawName
+                      : (ing.productName ?? '').trim())
+                  .trim();
               final measureParts = [
                 if (qtyStr.isNotEmpty) qtyStr,
                 if (ing.unit.isNotEmpty) ing.unit,
@@ -430,8 +434,8 @@ class _RecipeBody extends StatelessWidget {
                     Expanded(
                       child: Text(
                         ing.note != null
-                            ? '${ing.productName} (${ing.note})'
-                            : ing.productName,
+                            ? '$ingredientLabel (${ing.note})'
+                            : ingredientLabel,
                         style: theme.textTheme.bodyMedium,
                       ),
                     ),