feat(receipt-import): enhance bread category detection and improve session management

Co-authored-by: Copilot <copilot@github.com>

flutter/lib/features/import/utils/receipt_import_utils.dart

@@ -83,6 +83,15 @@ double? extractMultipackCountFromRawName(String rawName) {
   return double.tryParse(match.group(1)!);
 }
 
+double? extractPieceCountFromRawName(String rawName) {
+  final match = RegExp(
+    r'(\d+(?:[\.,]\d+)?)\s*st\b',
+    caseSensitive: false,
+  ).firstMatch(rawName);
+  if (match == null) return null;
+  return double.tryParse(match.group(1)!.replaceAll(',', '.'));
+}
+
 // ── Paketfältsinferens ────────────────────────────────────────────────────────
 
 typedef PackageFields = ({
@@ -102,6 +111,18 @@ PackageFields inferPackageFields({
   final safeCount = (quantity != null && quantity > 0) ? quantity : 1.0;
   final extracted = extractPackageSizeFromRawName(rawName);
   final multipackCount = extractMultipackCountFromRawName(rawName);
+  final pieceCount = extractPieceCountFromRawName(rawName);
+
+  // Exempel: "SALAMI PEPPAR 150G 2st" ska ge pack=150g och antal förpackningar=2.
+  if (extracted != null && pieceCount != null && pieceCount > 0) {
+    return (
+      packQuantity: extracted.packQuantity,
+      packUnit: extracted.packUnit,
+      packageCount: pieceCount,
+      totalQuantity: extracted.packQuantity * pieceCount,
+      totalUnit: extracted.packUnit,
+    );
+  }
 
   // Om rånamnet innehåller storlek (t.ex. "5dl") och enhet saknas eller är
   // paketliknande — använd extraherad storlek.
@@ -132,11 +153,14 @@ PackageFields inferPackageFields({
   }
 
   if (isPackageLikeUnit(normalizedUnit) && extracted != null) {
+    final packageCount = pieceCount != null && pieceCount > 0
+        ? pieceCount
+        : quantity;
     return (
       packQuantity: extracted.packQuantity,
       packUnit: extracted.packUnit,
-      packageCount: quantity,
-      totalQuantity: extracted.packQuantity * quantity,
+      packageCount: packageCount,
+      totalQuantity: extracted.packQuantity * packageCount,
       totalUnit: extracted.packUnit,
     );
   }