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

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

backend/src/receipt-import/receipt-import.service.ts

@@ -60,6 +60,22 @@ function hasPorkLikeSignal(normalized: string): boolean {
   );
 }
 
+function hasBreadLikeSignal(normalized: string): boolean {
+  return (
+    /\brostbrod\b/.test(normalized) ||
+    /\brost\s*n\s*toast\b/.test(normalized) ||
+    /\broast\s*n\s*toast\b/.test(normalized) ||
+    /\btoastbrod\b/.test(normalized) ||
+    /\bformbrod\b/.test(normalized) ||
+    /\blantbrod\b/.test(normalized) ||
+    /\bfullkornsbrod\b/.test(normalized) ||
+    /\bfranska\b/.test(normalized) ||
+    /\blimpa\b/.test(normalized) ||
+    /\bbrod\b/.test(normalized) ||
+    /\btoast\b/.test(normalized)
+  );
+}
+
 function inferPackageDebugFromRawName(rawName: string): {
   packageCount: number;
   packQuantity: number | null;
@@ -465,6 +481,24 @@ export class ReceiptImportService {
     );
   }
 
+  private resolveBreadCategory(
+    categories: Awaited<ReturnType<CategoriesService['findFlattened']>>,
+  ) {
+    return (
+      categories.find(
+        (c) =>
+          c.name.toLowerCase() === 'rostbröd' &&
+          c.path.toLowerCase().startsWith('bröd & kakor > bröd > '),
+      ) ||
+      categories.find(
+        (c) =>
+          c.name.toLowerCase() === 'bröd' &&
+          c.path.toLowerCase() === 'bröd & kakor > bröd',
+      ) ||
+      categories.find((c) => c.path.toLowerCase() === 'bröd & kakor')
+    );
+  }
+
   private applyHardCategoryOverrides(
     signalText: string,
     suggestion: CategorySuggestion,
@@ -531,6 +565,14 @@ export class ReceiptImportService {
     // ── Regel: Kött/chark (bacon/fläsk m.m.) ────────────────────────────
     const hasPorkSignal = hasPorkLikeSignal(normalized);
 
+    const hasToastBreadSignal = hasBreadLikeSignal(normalized);
+
+    if (hasToastBreadSignal) {
+      const bread = this.resolveBreadCategory(categories);
+      const hit = toSuggestion(bread, 'high');
+      if (hit) return hit;
+    }
+
     if (hasPorkSignal) {
       const l3Pork = this.resolvePorkCategory(categories);
       const hit = toSuggestion(l3Pork, 'high');
@@ -975,6 +1017,28 @@ export class ReceiptImportService {
       };
     }
 
+    const hasToastBreadSignal = hasBreadLikeSignal(normalized);
+
+    if (hasToastBreadSignal) {
+      const aiPath = suggestion.path.toLowerCase();
+      const isOutsideBread = !aiPath.startsWith('bröd & kakor > bröd');
+      if (!isOutsideBread) return suggestion;
+
+      const bread = this.resolveBreadCategory(categories);
+      if (!bread) return suggestion;
+
+      this.logger.log(
+        `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${bread.path}"`,
+      );
+      return {
+        categoryId: bread.id,
+        categoryName: bread.name,
+        path: bread.path,
+        confidence: 'high',
+        usedFallback: true,
+      };
+    }
+
     return suggestion;
   }
 }