feat: 场景优化 - 清理重复对象、设置Tags/Colliders、重建Canvas UI、连线Inspector引用

- 删除顶层重复的 GameManager/ExperimentController/InteractionSystem/AnimationController
- 移除Canvas上的旧 HUDController（保留 UIManager）
- 为14个交互定位点设置Tag并添加SphereCollider
- 创建12个自定义Tag（InjuryVisual/Swelling/Pain/VitalSigns/Neuro/BandagePos1-3/Ankle/PaddingPos/SplintLeft/SplintRight）
- 完全重建Canvas UI子对象结构以匹配 UIManager 脚本
- 连线 ExperimentFlowCoordinator 和 UIManager 的所有 serialized fields
- 编译零错误，游戏画面正常显示

Assets/Scripts/UI/UIManager.cs

@@ -1,10 +1,9 @@
 using UnityEngine;
 using UnityEngine.UI;
-using TMPro;
 
 /// <summary>
 /// UI 中央调度器：引用所有子面板，绑定 StepManager 事件。
-/// 挂在 Canvas GameObject 上。
+/// 挂在 Canvas GameObject 上。使用原生 Text（非 TMP）。
 /// </summary>
 public class UIManager : MonoBehaviour
 {
@@ -14,15 +13,15 @@ public class UIManager : MonoBehaviour
 
     [Header("=== 顶部提示栏 ===")]
     [SerializeField] private GameObject _tipPanel;
-    [SerializeField] private TMP_Text _tipText;
+    [SerializeField] private Text _tipText;
 
-    [Header("=== 详细操作说明（甲方补充 - 学习模式） ===")]
+    [Header("=== 详细操作说明面板 ===")]
     [SerializeField] private GameObject _detailPanel;
-    [SerializeField] private TMP_Text _detailText;
+    [SerializeField] private Text _detailText;
 
     [Header("=== 对话气泡 ===")]
     [SerializeField] private GameObject _dialogueBubble;
-    [SerializeField] private TMP_Text _dialogueText;
+    [SerializeField] private Text _dialogueText;
 
     [Header("=== 画中画视频 ===")]
     [SerializeField] private VideoController _videoController;
@@ -33,17 +32,17 @@ public class UIManager : MonoBehaviour
     [SerializeField] private Button _btnNext;
     [SerializeField] private Button _btnSwitchMode;
     [SerializeField] private Button _btnReturn;
-    [SerializeField] private TMP_Text _btnSwitchModeLabel;
+    [SerializeField] private Text _btnSwitchModeLabel;
 
     [Header("=== 底部进度条 ===")]
     [SerializeField] private Slider _progressBar;
-    [SerializeField] private TMP_Text _progressText;
+    [SerializeField] private Text _progressText;
 
     [Header("=== 弹窗 ===")]
     [SerializeField] private ExamPopup _examPopup;
     [SerializeField] private ScoreDisplay _scoreDisplay;
 
-    [Header("=== 底部主菜单图标 ===")]
+    [Header("=== 底部图标 ===")]
     [SerializeField] private Button _btnCPR;
     [SerializeField] private Button _btnFracture;
     [SerializeField] private Button _btnSprain;
@@ -57,6 +56,11 @@ public class UIManager : MonoBehaviour
 
     private void Start()
     {
+        if (_stepManager == null)
+            _stepManager = FindObjectOfType<StepManager>();
+        if (_interactionSystem == null)
+            _interactionSystem = FindObjectOfType<InteractionSystem>();
+
         BindEvents();
         BindButtons();
     }
@@ -78,14 +82,13 @@ public class UIManager : MonoBehaviour
 
     private void BindButtons()
     {
-        _btnFullScreen?.onClick.AddListener(ToggleFullScreen);
-        _btnPrevious?.onClick.AddListener(OnPreviousClicked);
-        _btnNext?.onClick.AddListener(OnNextClicked);
-        _btnSwitchMode?.onClick.AddListener(OnSwitchModeClicked);
-        _btnReturn?.onClick.AddListener(OnReturnClicked);
-
-        _btnLimbFixation?.onClick.AddListener(() => _stepManager?.SwitchFixation(FixationMethod.LimbFixation));
-        _btnSplintFixation?.onClick.AddListener(() => _stepManager?.SwitchFixation(FixationMethod.SplintFixation));
+        if (_btnFullScreen) _btnFullScreen.onClick.AddListener(ToggleFullScreen);
+        if (_btnPrevious) _btnPrevious.onClick.AddListener(OnPreviousClicked);
+        if (_btnNext) _btnNext.onClick.AddListener(OnNextClicked);
+        if (_btnSwitchMode) _btnSwitchMode.onClick.AddListener(OnSwitchModeClicked);
+        if (_btnReturn) _btnReturn.onClick.AddListener(OnReturnClicked);
+        if (_btnLimbFixation) _btnLimbFixation.onClick.AddListener(() => _stepManager?.SwitchFixation(FixationMethod.LimbFixation));
+        if (_btnSplintFixation) _btnSplintFixation.onClick.AddListener(() => _stepManager?.SwitchFixation(FixationMethod.SplintFixation));
     }
 
     #endregion
@@ -131,17 +134,17 @@ public class UIManager : MonoBehaviour
         int cur = _stepManager.CurrentStepIndex + 1;
         int total = _stepManager.TotalSteps;
         if (_progressBar != null) _progressBar.value = (float)cur / total;
-        if (_progressText != null) _progressText.text = $"{cur}/{total}";
+        if (_progressText != null) _progressText.text = cur + "/" + total;
     }
 
     private void UpdateNavigationButtons()
     {
         if (_stepManager == null) return;
-        _btnPrevious.interactable = _stepManager.CurrentStepIndex > 0;
-        bool isLast = _stepManager.CurrentStepIndex >= _stepManager.TotalSteps - 1;
-        if (_btnNext != null)
+        if (_btnPrevious) _btnPrevious.interactable = _stepManager.CurrentStepIndex > 0;
+        if (_btnNext)
         {
-            var label = _btnNext.GetComponentInChildren<TMP_Text>();
+            var label = _btnNext.GetComponentInChildren<Text>();
+            bool isLast = _stepManager.CurrentStepIndex >= _stepManager.TotalSteps - 1;
             if (label != null) label.text = isLast ? "完成" : "下一步";
         }
     }
@@ -171,13 +174,9 @@ public class UIManager : MonoBehaviour
         var gm = GameManager.Instance;
         if (gm == null) return;
         if (gm.CurrentMode == ExperimentMode.Exam)
-        {
             _scoreDisplay?.ShowExamScore();
-        }
         else
-        {
             _scoreDisplay?.ShowNotesOnly();
-        }
     }
 
     #endregion
@@ -196,17 +195,18 @@ public class UIManager : MonoBehaviour
 
     private void OnNextClicked()
     {
-        if (_stepManager.Mode == ExperimentMode.Exam)
+        if (_stepManager != null && _stepManager.Mode == ExperimentMode.Exam)
         {
             var step = _stepManager.GetCurrentStep();
             if (step != null && step.CompleteType != StepCompleteType.MultipleChoice)
                 _stepManager.OnStepInteractionComplete(1f);
         }
-        _stepManager.NextStep();
+        _stepManager?.NextStep();
     }
 
     private void OnSwitchModeClicked()
     {
+        if (_stepManager == null) return;
         var newMode = _stepManager.Mode == ExperimentMode.Learn
             ? ExperimentMode.Exam : ExperimentMode.Learn;
         _stepManager.SwitchMode(newMode);
@@ -214,7 +214,7 @@ public class UIManager : MonoBehaviour
 
     private void OnReturnClicked()
     {
-        UnityEngine.SceneManagement.SceneManager.LoadScene("MainMenu");
+        UnityEngine.SceneManagement.SceneManager.LoadScene("main");
     }
 
     #endregion