* Extended functionalities

* Added different UIs

MealPlan.Api/Services/Generators/IngredientScalingHelper.cs

@@ -0,0 +1,64 @@
+namespace MealPlan.Api.Services.Generators;
+
+public static class IngredientScalingHelper
+{
+    private const decimal CountAmountThreshold = 10m;
+
+    public static (decimal? AmountGrams, string? Unit) ScaleForDietPlan(
+        decimal? amountGrams,
+        string? unit,
+        decimal portions)
+    {
+        if (IsNonQuantifiedUnit(unit))
+        {
+            return (amountGrams, unit);
+        }
+
+        if (amountGrams is not > 0)
+        {
+            return (null, unit);
+        }
+
+        if (IsCountUnit(unit) && amountGrams.Value <= CountAmountThreshold)
+        {
+            var gramsPerUnit = GramsPerCountUnit(unit!);
+            var totalGrams = amountGrams.Value * gramsPerUnit * portions;
+            return (Math.Round(totalGrams, 1), null);
+        }
+
+        // AmountGrams stores weight in grams (even when the display unit says szt./ząbek).
+        return (Math.Round(amountGrams.Value * portions, 1), null);
+    }
+
+    public static bool IsNonQuantifiedUnit(string? unit)
+    {
+        if (string.IsNullOrWhiteSpace(unit)) return false;
+        var u = unit.Trim().ToLowerInvariant();
+        return u is "do smaku" or "optional" or "opcjonalnie" or "szczypta" or "to taste";
+    }
+
+    private static bool IsCountUnit(string? unit)
+    {
+        if (string.IsNullOrWhiteSpace(unit)) return false;
+        var u = NormalizeUnit(unit);
+        return u is "szt" or "sztuka" or "sztuki"
+            or "ząbek" or "zabek" or "zabki" or "clove" or "cloves"
+            or "łyżka" or "lyzka" or "łyżeczka" or "lyzeczka"
+            or "jajko" or "jajka" or "egg" or "eggs";
+    }
+
+    private static decimal GramsPerCountUnit(string unit)
+    {
+        var u = NormalizeUnit(unit);
+        return u switch
+        {
+            "ząbek" or "zabek" or "zabki" or "clove" or "cloves" => 4m,
+            "łyżka" or "lyzka" => 15m,
+            "łyżeczka" or "lyzeczka" => 5m,
+            _ => 60m, // szt., jajko — typical single egg / piece default
+        };
+    }
+
+    private static string NormalizeUnit(string unit) =>
+        unit.Trim().ToLowerInvariant().TrimEnd('.');
+}