fix(receipt-import): map standard milk away from lactose-free branch

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

@@ -489,6 +489,32 @@ export class ReceiptImportService {
       if (hit) return hit;
     }
 
+    // ── Regel: Vanlig mjölk (inte laktosfri/allergi) ───────────────────
+    const hasMilkSignal =
+      /\bmjolk\b/.test(normalized) ||
+      /\bstandardmjolk\b/.test(normalized) ||
+      /\bstandmjolk\b/.test(normalized) ||
+      /\besl\b/.test(normalized);
+    const hasLactoseFreeSignal =
+      /\blaktosfri\b/.test(normalized) ||
+      /\blactose\s*free\b/.test(normalized);
+
+    if (hasMilkSignal && !hasPlantOrAllergySignal && !hasLactoseFreeSignal) {
+      const l3StandardMilk = findCategory({
+        name: 'standardmjölk',
+        startsWith: 'mejeri, ost & ägg > mjölk > ',
+      });
+      const hit = toSuggestion(l3StandardMilk, 'high');
+      if (hit) return hit;
+
+      const l2Milk = findCategory({
+        name: 'mjölk',
+        startsWith: 'mejeri, ost & ägg > ',
+      });
+      const fallbackHit = toSuggestion(l2Milk, 'high');
+      if (fallbackHit) return fallbackHit;
+    }
+
     // ── Regel: Te ────────────────────────────────────────────────────────
     const isTea =
       /\bte\b/.test(normalized) ||
@@ -634,6 +660,39 @@ export class ReceiptImportService {
       };
     }
 
+    const hasMilkSignal =
+      /\bmjolk\b/.test(normalized) ||
+      /\bstandardmjolk\b/.test(normalized) ||
+      /\bstandmjolk\b/.test(normalized) ||
+      /\besl\b/.test(normalized);
+    const hasLactoseFreeSignal =
+      /\blaktosfri\b/.test(normalized) ||
+      /\blactose\s*free\b/.test(normalized);
+
+    if (hasMilkSignal && !hasLactoseFreeSignal) {
+      const isWrongLactoseFreeBranch =
+        suggestion.path.toLowerCase().includes('allergi mejeri > laktosfri mjölk');
+      if (isWrongLactoseFreeBranch) {
+        const l3StandardMilk = categories.find(
+          (c) =>
+            c.name.toLowerCase() === 'standardmjölk' &&
+            c.path.toLowerCase().startsWith('mejeri, ost & ägg > mjölk > '),
+        );
+        if (l3StandardMilk) {
+          this.logger.log(
+            `AI contradiction-guard: "${rawName}" remappas från "${suggestion.path}" till "${l3StandardMilk.path}"`,
+          );
+          return {
+            categoryId: l3StandardMilk.id,
+            categoryName: l3StandardMilk.name,
+            path: l3StandardMilk.path,
+            confidence: 'high',
+            usedFallback: true,
+          };
+        }
+      }
+    }
+
     const hasCreamSignal =
       /\bvispgradde\b/.test(normalized) ||
       /\bmatlagningsgradde\b/.test(normalized) ||
@@ -648,8 +707,7 @@ export class ReceiptImportService {
       /\brisdryck\b/.test(normalized) ||
       /\bplant\b/.test(normalized);
 
-    if (!hasCreamSignal || hasPlantOrAllergySignal) return suggestion;
-
+    if (hasCreamSignal && !hasPlantOrAllergySignal) {
       const aiPath = suggestion.path.toLowerCase();
       const isOutsideDairy = !aiPath.startsWith('mejeri, ost & ägg > matlagning');
       if (!isOutsideDairy) return suggestion;
@@ -672,4 +730,7 @@ export class ReceiptImportService {
         usedFallback: true,
       };
     }
+
+    return suggestion;
+  }
 }