physics: character controller (Jolt CharacterVirtual)

- CharacterControllerComponent: capsule params (radius/halfHeight, mass,
  max slope, step height); entity origin = feet via shape offset
- CharacterController per-entity wrapper: gravity integration + grounded
  clamp, ExtendedUpdate (sweep/slide + stick-to-floor + walk-stairs),
  SetLinearVelocity/Jump/IsGrounded facade
- PhysicsWorld: SyncCharacters reconcile (create/rebuild on param
  change, editor-drag teleport), UpdateCharacters after physics Update
  (Jolt recommended order), writes back to Transform
- Inspector: params + grounded/velocity telemetry + jump debug button
- Serialization: params only, state rebuilt by reconcile

App/editor/InspectorPanel.cpp

@@ -121,6 +121,11 @@ void InspectorPanel::Draw(const EditorContext& ctx, entt::entity selected)
         {
             reg.emplace<Engine::ECS::JointComponent>(selected);
         }
+        if (!reg.all_of<Engine::ECS::CharacterControllerComponent>(selected) &&
+            ImGui::MenuItem("Character Controller"))
+        {
+            reg.emplace<Engine::ECS::CharacterControllerComponent>(selected);
+        }
         ImGui::EndPopup();
     }
     ImGui::Separator();
@@ -391,6 +396,38 @@ void InspectorPanel::Draw(const EditorContext& ctx, entt::entity selected)
         }
     }
 
+    // ---- CharacterController（参数编辑；状态在 PhysicsWorld 运行时）----
+    if (auto* cc = reg.try_get<Engine::ECS::CharacterControllerComponent>(selected))
+    {
+        if (ImGui::CollapsingHeader("Character Controller",
+                                    ImGuiTreeNodeFlags_DefaultOpen))
+        {
+            // 实体原点 = 脚底（胶囊底端），总高 = 2*(halfHeight + radius)
+            ImGui::DragFloat("radius", &cc->radius, 0.02f, 0.05f, 5.0f);
+            ImGui::DragFloat("halfHeight", &cc->capsuleHalfHeight, 0.02f, 0.0f, 5.0f);
+            ImGui::DragFloat("mass", &cc->mass, 1.0f, 1.0f, 500.0f, "%.0f");
+            ImGui::DragFloat("max slope deg", &cc->maxSlopeAngle, 1.0f, 1.0f, 89.0f);
+            ImGui::DragFloat("step height", &cc->stepHeight, 0.02f, 0.0f, 2.0f);
+
+            // 遥测（只读）：运行时状态在 PhysicsWorld 的 CharacterController
+            if (auto& phy = ctx.app->GetPhysics(); phy.IsEnabled())
+            {
+                const uint32_t bits =
+                    static_cast<uint32_t>(entt::to_integral(selected));
+                ImGui::Text("grounded: %s",
+                            phy.IsCharacterGrounded(bits) ? "yes" : "no");
+                const glm::vec3 v = phy.GetCharacterVelocity(bits);
+                ImGui::Text("vel: %.2f, %.2f, %.2f m/s", v.x, v.y, v.z);
+
+                // 跳跃调试按钮
+                if (ImGui::Button("Jump"))
+                {
+                    phy.Jump(bits, 5.0f);
+                }
+            }
+        }
+    }
+
     // ---- Animation ----
     if (auto* anim = reg.try_get<Engine::ECS::AnimationComponent>(selected))
     {