Prevent quantity from going to zero

Author: fmasa

common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/character/trappings/detail/QuantityBar.kt

@@ -41,7 +41,7 @@ fun QuantityBar(
                 value = quantity,
                 onIncrement = { onQuantityChange(trapping.quantity + 1) },
                 onDecrement = {
-                    if (quantity > 0) {
+                    if (quantity > 1) {
                         onQuantityChange(quantity - 1)
                     }
                 }

common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/trappings/InventoryItem.kt

@@ -25,6 +25,11 @@ data class InventoryItem(
     @Contextual val containerId: InventoryItemId? = null,
     val trappingType: TrappingType? = null,
 ) : CharacterItem<InventoryItem, Nothing> {
+
+    init {
+        require(quantity > 0) { "Quantity must be greater than 0" }
+    }
+
     companion object {
         const val NAME_MAX_LENGTH = 50
         const val DESCRIPTION_MAX_LENGTH = 200