feat(engine): C++ native script system (ScriptBehavior + registry)

ScriptComponent stores only a script name string (POD, serializable);
instances are reconciled by ScriptRuntime each frame (PhysicsWorld
pattern): orphan/rename cleanup with OnDestroy, per-name instantiation
from a file-level self-registering registry (ENGINE_REGISTER_SCRIPT),
OnCreate on bind, OnUpdate after physics step on scaled dt. Engine
framerate loop only sees the base interface, so future Lua/C# behaviors
plug in as foreign ScriptBehavior implementations with zero engine
changes. Ships a Spinner sample script and Inspector script picker.

App/editor/InspectorPanel.cpp

@@ -9,6 +9,7 @@
 #include "Engine/ECS/Components.h"
 #include "Engine/Renderer/Model.h"
 #include "Engine/Physics/PhysicsWorld.h"   // Apply Impulse 调试（GetPhysics 门面）
+#include "Engine/Scripting/Script.h"       // 脚本下拉（ScriptRegistry::Names）
 
 #include <imgui.h>
 
@@ -126,6 +127,11 @@ void InspectorPanel::Draw(const EditorContext& ctx, entt::entity selected)
         {
             reg.emplace<Engine::ECS::CharacterControllerComponent>(selected);
         }
+        if (!reg.all_of<Engine::ECS::ScriptComponent>(selected) &&
+            ImGui::MenuItem("Script"))
+        {
+            reg.emplace<Engine::ECS::ScriptComponent>(selected);
+        }
         ImGui::EndPopup();
     }
     ImGui::Separator();
@@ -428,6 +434,39 @@ void InspectorPanel::Draw(const EditorContext& ctx, entt::entity selected)
         }
     }
 
+    // ---- Script（按名解析注册表脚本；实例生命周期在 ScriptRuntime）----
+    if (auto* sc = reg.try_get<Engine::ECS::ScriptComponent>(selected))
+    {
+        if (ImGui::CollapsingHeader("Script", ImGuiTreeNodeFlags_DefaultOpen))
+        {
+            // 下拉列出全部已注册脚本（注册序）；"<none>" = 清空（对账自动销毁实例）
+            const auto& names = Engine::Scripting::ScriptRegistry::Names();
+            std::vector<const char*> items;
+            items.push_back("<none>");
+            for (const auto& n : names)
+            {
+                items.push_back(n.c_str());
+            }
+            int cur = 0;
+            for (size_t i = 0; i < names.size(); ++i)
+            {
+                if (names[i] == sc->scriptName)
+                {
+                    cur = static_cast<int>(i) + 1;
+                }
+            }
+            if (ImGui::Combo("script", &cur, items.data(),
+                             static_cast<int>(items.size())))
+            {
+                sc->scriptName = (cur <= 0) ? "" : names[static_cast<size_t>(cur) - 1];
+            }
+            if (sc->scriptName.empty())
+            {
+                ImGui::TextDisabled("no script assigned");
+            }
+        }
+    }
+
     // ---- Animation ----
     if (auto* anim = reg.try_get<Engine::ECS::AnimationComponent>(selected))
     {