fix(fix): 调整对话气泡加载时机与销售态槽位优先级

Enter 中先 LoadBubbles 再 SwitchCamera，避免 me: 释放log 时找不到 Player 槽位。
SalesState 中优先使用 salesManager.bubbleSlotGroup，缺失时回退 ScreenSystem。

Made-with: Cursor

Assets/Scripts/UI/DialogUI/Bubbles/BubbleGroup.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
@@ -55,6 +55,11 @@ namespace AibisDream
                 .Select(item => _bubbleFactory.Create(item))
                 .GroupBy(item => item.Role)
                 .ToDictionary(group => group.Key, group => group.ToArray());
+
+#if UNITY_EDITOR
+            var roleSummary = string.Join(", ", _bubbleDict.Select(kv => $"{kv.Key}({kv.Value.Length})"));
+            Debug.Log($"[BubbleGroup] 已加载 {groupData.dialogViewType}: {roleSummary}", this);
+#endif
         }
 
         #endregion