增加skill、加入界面基础加载

Assets/Scripts/UI/PauseMenu.cs

@@ -0,0 +1,53 @@
+using System.Collections;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+/// <summary>
+/// 暂停菜单：继续游戏 / 回到 Main 场景。
+/// 按钮点击在各自 Button 的 On Click() 里接线（Inspector 配置）。
+/// </summary>
+[DisallowMultipleComponent]
+public class PauseMenu : MonoBehaviour
+{
+    [Tooltip("「回到Main」要加载的场景名，必须已经加进 Build Settings")]
+    [SerializeField] private string mainSceneName = "Main";
+
+    private bool _leaving;
+
+    /// <summary>继续游戏：恢复时间，关掉自己。</summary>
+    public void OnContinueClicked()
+    {
+        Time.timeScale = 1f;
+        Destroy(gameObject);
+    }
+
+    /// <summary>回到 Main：加载 Main 场景，加载完成后卸载当前场景。</summary>
+    public void OnBackToMainClicked()
+    {
+        if (_leaving) return;
+        _leaving = true;
+        Time.timeScale = 1f;
+        StartCoroutine(LoadMainThenUnloadCurrent());
+    }
+
+    private IEnumerator LoadMainThenUnloadCurrent()
+    {
+        Scene currentScene = gameObject.scene;
+
+        AsyncOperation load = SceneManager.LoadSceneAsync(mainSceneName, LoadSceneMode.Additive);
+        if (load == null)
+        {
+            Debug.LogError("[PauseMenu] 场景 \"" + mainSceneName + "\" 加载失败，确认它已加入 Build Settings。", this);
+            _leaving = false;
+            yield break;
+        }
+
+        yield return load;   // 等 Main 加载完成
+
+        Scene loaded = SceneManager.GetSceneByName(mainSceneName);
+        if (loaded.IsValid())
+            SceneManager.SetActiveScene(loaded);
+
+        SceneManager.UnloadSceneAsync(currentScene);   // 卸载当前场景
+    }
+}