fix: 언어에 따라 비교값이 달라질 수 있는 문제 해결

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: opficdev

DevLog/Presentation/ViewModel/TodoManageViewModel.swift

@@ -87,7 +87,7 @@ final class TodoManageViewModel: Store {
         }
 
         if SystemTodoCategory.allCases.contains(where: {
-            SystemTodoCategoryItem(from: $0).localizedName.caseInsensitiveCompare(trimmedCategoryName) == .orderedSame
+            $0.rawValue.caseInsensitiveCompare(trimmedCategoryName) == .orderedSame
         }) {
             return false
         }