feat: 우선순위 중복 시 기존 항목을 NONE으로 초기화하도록 수정

app/src/main/java/com/laseroptek/raman/ui/screens/home/preset/PresetLoadPopup.kt

@@ -646,7 +646,7 @@ fun PresetLoadPopup(
                                     Timber.d("onClick - Confirm Save")
 
                                     // Check empty names and conflict priority exist in the preset viewmodel's presetList
-                                    val listToValidate = presetViewModel.presetList.value
+                                    var listToValidate = presetViewModel.presetList.value
 
                                     // Check for any presets with an empty name
                                     val hasEmptyName =
@@ -678,18 +678,32 @@ fun PresetLoadPopup(
                                     }
 
                                     // Check for duplicate priorities (ignoring priority 0)
-                                    val priorityConflicts = listToValidate
-                                        .filter { it.priority > 0 } // Only consider prioritized items
-                                        .groupBy { it.priority }   // Group them by priority
-                                        .any { it.value.size > 1 } // Check if any group is larger than 1
+                                    val duplicatePriorityGroups = listToValidate
+                                        .filter { it.priority > 0 }
+                                        .groupBy { it.priority }
+                                        .filter { it.value.size > 1 }
 
-                                    if (priorityConflicts) {
-                                        Toast.makeText(
-                                            context,
-                                            "There are duplicate priorities. Please ensure each priority is unique.",
-                                            Toast.LENGTH_LONG
-                                        ).show()
-                                        return@noRippleClickable // Stop the process
+                                    if (duplicatePriorityGroups.isNotEmpty()) {
+                                        val resolvedList = listToValidate.map { it.copy() }.toMutableList()
+                                        val selectedPreset = resolvedList.getOrNull(selectedPresetIndex)
+
+                                        duplicatePriorityGroups.forEach { (priorityValue, presets) ->
+                                            val keeperId = presets
+                                                .firstOrNull { preset ->
+                                                    selectedPreset != null && preset.id == selectedPreset.id
+                                                }
+                                                ?.id
+                                                ?: presets.first().id
+
+                                            resolvedList.forEachIndexed { index, preset ->
+                                                if (preset.priority == priorityValue && preset.id != keeperId) {
+                                                    resolvedList[index] = preset.copy(priority = 0)
+                                                }
+                                            }
+                                        }
+
+                                        presetViewModel.setPresetList(resolvedList)
+                                        listToValidate = resolvedList
                                     }
 
                                     Timber.d("Validation successful. Saving list to MainViewModel.")