接入菜单导航并改造通用按钮交互

- 将 CommonButton 改为基于 Unity Button 实现，保留原有 pointer enter、click、pointer exit 三类事件配置，同时接入 Selectable/Button 的导航、选中和提交能力。补充 CommonButton 自定义 Inspector，保留项目自定义事件与背景配置的编辑体验。

- 同步调整菜单相关 UI，将 StartMenuForm 迁移为 MenuForm，并更新 UIForm 配置、菜单 Controller/Form 以及相关 prefab 引用。更新多个 UI prefab 和通用按钮 prefab，使菜单、商店、角色选择、道具展示等界面能够使用新的按钮选中与导航交互。

Assets/GameMain/UI/UIForms/SelectRoleForm.prefab

@@ -2157,6 +2157,11 @@ PrefabInstance:
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     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
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+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -2383,6 +2388,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
+      objectReference: {fileID: 0}
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -2609,6 +2619,16 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Transition
+      value: 0
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       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -2835,6 +2855,16 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Transition
+      value: 0
+      objectReference: {fileID: 0}
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -3061,6 +3091,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -3556,6 +3591,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
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       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -3782,6 +3822,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -4008,6 +4053,16 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Transition
+      value: 0
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       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -4234,6 +4289,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
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+      value: 1
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -4460,6 +4520,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
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       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -4686,6 +4751,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
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         type: 3}
       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size
@@ -4912,6 +4982,11 @@ PrefabInstance:
     serializedVersion: 3
     m_TransformParent: {fileID: 6124030385652187818}
     m_Modifications:
+    - target: {fileID: 3813327180119752992, guid: 78595a129d0438c44b2d52720e9c0edd,
+        type: 3}
+      propertyPath: m_Enabled
+      value: 1
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       propertyPath: _onClickAction.m_PersistentCalls.m_Calls.Array.size