refactor: use ternary operator for conditional assignments

This PR refactors code that used multi-line if/else statements to use the ternary operator for more concise and readable assignments.

- if statement can be rewritten using the ternary operator: The original code assigned values based on Storage.ExistsAsync(key) with separate if and else blocks, leading to verbose multi-line statements. We have replaced these with single-line ternary expressions in both the generic GetAsync<T> method and the UnifiedSettingsFile loader, reducing code duplication and improving clarity.

> This Autofix was generated by AI. Please review the change before merging.

GFramework.Game/Data/DataRepository.cs

@@ -46,12 +46,8 @@ public class DataRepository(IStorage? storage, DataRepositoryOptions? options =
     {
         var key = location.ToStorageKey();
 
-        T result;
         // 检查存储中是否存在指定键的数据
-        if (await Storage.ExistsAsync(key))
-            result = await Storage.ReadAsync<T>(key);
-        else
-            result = new T();
+        T result = await Storage.ExistsAsync(key) ? await Storage.ReadAsync<T>(key) : new T();
 
         // 如果启用事件功能，则发送数据加载完成事件
         if (_options.EnableEvents)

GFramework.Game/Data/UnifiedSettingsDataRepository.cs

@@ -211,10 +211,7 @@ public class UnifiedSettingsDataRepository(
 
             var key = UnifiedKey;
 
-            if (await Storage.ExistsAsync(key))
-                _file = await Storage.ReadAsync<UnifiedSettingsFile>(key);
-            else
-                _file = new UnifiedSettingsFile { Version = 1 };
+            _file = await Storage.ExistsAsync(key) ? await Storage.ReadAsync<UnifiedSettingsFile>(key) : new UnifiedSettingsFile { Version = 1 };
 
             _loaded = true;
         }