feat: enhance ingredient matching rules with keyword matching and add chocolate detection

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

@@ -68,12 +68,11 @@ function hasPorkLikeSignal(normalized: string): boolean {
     normalized.includes('bacn') ||
     normalized.includes('baco') ||
     /\bbac[a-z0-9]{1,5}\b/.test(normalized) ||
-    /\bsidflask\b/.test(normalized) ||
-    /\bpancetta\b/.test(normalized) ||
-    /\bflask\b/.test(normalized) ||
-    /\bflaskfile\b/.test(normalized) ||
-    /\bkarr[eé]\b/.test(normalized) ||
-    /\bkotlett\b/.test(normalized)
+    normalized.includes('sidflask') ||
+    normalized.includes('pancetta') ||
+    normalized.includes('flask') ||
+    normalized.includes('karre') ||
+    normalized.includes('kotlett')
   );
 }
 
@@ -699,6 +698,24 @@ export class ReceiptImportService {
       if (hit) return hit;
     }
 
+    // ── Regel: Choklad & spreads (Nutella, sjokolade, m.m.) ─────────────
+    const hasChocolateSignal =
+      normalized.includes('nutella') ||
+      normalized.includes('chocolate') ||
+      normalized.includes('choklad') ||
+      normalized.includes('sjokolade') ||
+      normalized.includes('kakao') ||
+      normalized.includes('spreads');
+
+    if (hasChocolateSignal) {
+      const chocolate = findCategory({
+        name: 'choklad & spreads',
+        includes: 'sötsaker',
+      });
+      const hit = toSuggestion(chocolate, 'high');
+      if (hit) return hit;
+    }
+
     // ── Regel: Korvfamiljen ─────────────────────────────────────────────
     const hasSausageSignal =
       /\bkorv\b/.test(normalized) ||