多轮审查和修复

Assets/Scripts/UI/SaveIndicator.cs

@@ -0,0 +1,59 @@
+using System.Collections;
+using UnityEngine;
+using BaseGames.Core.Events;
+
+namespace BaseGames.UI
+{
+    /// <summary>
+    /// 右下角存档进行中提示（架构 10_UIModule §7.6）。
+    /// 订阅 EVT_SaveIndicatorVisible（BoolEventChannelSO）：true = 淡入，false = 淡出。
+    /// </summary>
+    [RequireComponent(typeof(CanvasGroup))]
+    public class SaveIndicator : MonoBehaviour
+    {
+        [SerializeField] private CanvasGroup        _cg;
+        [SerializeField] private float              _fadeDuration = 0.2f;
+
+        [Header("Event Channel")]
+        [SerializeField] private BoolEventChannelSO _onSaveIndicatorVisible;  // EVT_SaveIndicatorVisible
+
+        private Coroutine _fadeCoroutine;
+        private readonly CompositeDisposable _subs = new();
+
+        private void Awake()
+        {
+            if (_cg == null) _cg = GetComponent<CanvasGroup>();
+            _cg.alpha = 0f;
+        }
+
+        private void OnEnable()
+        {
+            _onSaveIndicatorVisible?.Subscribe(OnVisibilityChanged).AddTo(_subs);
+        }
+        private void OnDisable()
+        {
+            _subs.Clear();
+        }
+
+        private void OnVisibilityChanged(bool visible) => FadeTo(visible ? 1f : 0f);
+
+        private void FadeTo(float target)
+        {
+            if (_fadeCoroutine != null) StopCoroutine(_fadeCoroutine);
+            _fadeCoroutine = StartCoroutine(FadeCoroutine(target));
+        }
+
+        private IEnumerator FadeCoroutine(float target)
+        {
+            float start   = _cg.alpha;
+            float elapsed = 0f;
+            while (elapsed < _fadeDuration)
+            {
+                _cg.alpha = Mathf.Lerp(start, target, elapsed / _fadeDuration);
+                elapsed  += Time.unscaledDeltaTime;
+                yield return null;
+            }
+            _cg.alpha = target;
+        }
+    }
+}