StageAnim: stop free-running the wash light sweep clips

"Only one clip" tells you the object has only one state. It does not tell you that state is
playing — that decision belonged to AnimationObjectController, which we do not have. The
takeover rule conflated the two, and wash_ground_b/c/d is where it shows: their single clip
swings the swing_* node 90deg -> 0 -> 90deg every 2.0 s, twelve lamps in lockstep, so the whole
row sits there whipping back and forth. The reference MV has the ground wash lights holding
still and blinking instead.

Same failure shape as the billboard facing behaviour: the target objects were verified, the
behaviour was inferred. Sweep rigs (name contains _wash_, the same test StageController already
uses to identify wash lights) are now skipped and logged.

The mirror ball keeps playing. Its clip winds monotonically to -359 deg about Y, which is a
self-evident idle spin, and the ball does turn in the original. Whether it turns at 1.0x is
still unsupported and stays on the unknown list.

Recorded in the source that this exclusion comes from watching reference footage, not from
bundle data, so a stage whose wash lights genuinely do sweep needs new evidence rather than an
argument from this line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UzXXkLzVC8pNA3JjyUGMbq

Assets/Scripts/umamusume/Gallop/Live/StageAnimationPlayer.cs

@@ -30,20 +30,49 @@ namespace Gallop.Live
     /// blinklight/_wash_/laser/spotlight3d）初始是 inactive 的，要等轨道把它们打开，
     /// 在 inactive 对象上调 Play() 不会生效。镜面球容器
     /// pfb_env_live10149_blinklight_mirrorball_flarelight 正好就是这种情况。
+    ///
+    /// ── 2026-08-07 收窄：wash 灯的扫动 clip 不再 free-run ──
+    ///
+    /// 「只有一个 clip」说明的是**这个物件只有一个状态**，不等于**这个状态一直在播** ——
+    /// 后者正是缺失的 `AnimationObjectController` 负责决定的事，我把两者混为一谈了。
+    ///
+    /// 实测反例：`wash_ground_b/c/d` 的单 clip 是 `swing_*` 节点 90°→0°→90° 的往返扫动，
+    /// 2.0 s 一个来回（12 盏完全同步）。放出来就是一排灯在疯狂摆头，而**原版 MV 里
+    /// 地面 wash 灯是不扫的，只闪**。所以这三个不接管。
+    ///
+    /// 镜面球保留：它的 clip 是绕 Y 单调转到 −359°，是自明的常转 idle，原版里球也确实在转。
+    /// （转速是否 1.0 倍仍无依据，见 CLAUDE.md。）
+    ///
+    /// ⚠ 这条排除是**看参考视频得出的观察**，不是从 bundle 数据推出来的。
+    /// 如果哪个舞台的 wash 灯真的该扫，需要新的证据才能放开，别照着这行反推。
     /// </summary>
     public static class StageAnimationPlayer
     {
+        /// <summary>
+        /// 扫动类灯具的名字特征。命中的不接管 —— 见类注释。
+        /// 和 <see cref="StageController"/> 的 `_wash_` 判据同源，那里也是按名字识别 wash 灯的。
+        /// </summary>
+        private static bool IsSweepRig(string name) => name.Contains("_wash_");
+
         public static void Setup(StageController stage)
         {
             if (stage == null) return;
 
-            int single = 0, ambiguous = 0, empty = 0;
+            int single = 0, ambiguous = 0, empty = 0, sweepSkipped = 0;
             var loggedClipSets = new HashSet<string>();
 
             foreach (var anim in stage.GetComponentsInChildren<Animation>(true))
             {
                 if (anim == null || !anim.playAutomatically) continue;
 
+                if (IsSweepRig(anim.gameObject.name))
+                {
+                    if (sweepSkipped++ == 0)
+                        Debug.Log($"[StageAnim] 跳过扫动类灯具（如 '{anim.gameObject.name}'）：" +
+                                  "单 clip 只说明它只有一个状态，不说明该一直播；原版地面 wash 灯不扫只闪。");
+                    continue;
+                }
+
                 var clips = new List<AnimationClip>();
                 foreach (AnimationState st in anim)
                 {
@@ -80,7 +109,8 @@ namespace Gallop.Live
                 }
             }
 
-            Debug.Log($"[StageAnim] 单 clip 已接管 {single} 个；多 clip 未处理 {ambiguous} 个；无 clip {empty} 个");
+            Debug.Log($"[StageAnim] 单 clip 已接管 {single} 个；扫动类跳过 {sweepSkipped} 个；" +
+                      $"多 clip 未处理 {ambiguous} 个；无 clip {empty} 个");
         }
     }