fix(editor): rotation drag accumulates without wrap (UE session semantics)

Dragging rotation hit a wall at the wrap point: each frame re-read
euler from the quat and wrapped to [0,360), so dragging past 360
snapped the display back to 0 (and backwards dragging wrapped up to
360) -- values "jumped around" instead of accumulating.

Port UE TransformDetails session semantics: the rotation row shows a
local mirror value while the user edits it (accumulating freely in
both directions, never wrapping), and re-syncs from the quat only on
foreign changes (gizmo drag, physics writeback, entity switch).
Detection is exact component-wise quat equality: the mirror quat comes
from the same QuatFromEuler used by SetRotation, so an untouched pair
compares bit-equal, while any foreign writeback -- including sub-0.05
degree gizmo steps that a dot-product threshold would miss -- differs
in at least one float. Edit frames skip the check (mirror leads the
quat by one drag delta), gated on the previous frame's item-active
state.

Engine/include/Engine/ECS/Components.h

@@ -98,13 +98,20 @@ namespace Engine::ECS {
         TransformComponent& SetPosition(const glm::vec3& p) { if (m_Position != p) { m_Position = p; m_Dirty = true; } return *this; }
         // 欧拉角（度）入口：UI/游戏逻辑用。转 quat 存（q = qy·qx·qz，
         // 与原 Ry·Rx·Rz 合成严格同构；不能用 glm::quat(euler) ctor——
-        // 那是 ZYX 航向序，语义不同）
+        // 那是 ZYX 航向序，语义不同）。输入域无限制：三角函数周期性
+        // 自动归一（720 ≡ -45 ≡ 315），编辑器拖动累计值直接喂
         TransformComponent& SetRotation(const glm::vec3& r)
+        {
+            return SetRotationQuat(QuatFromEuler(r));
+        }
+        // 欧拉（度）→ quat 的唯一转换点（qy·qx·qz）。static 供编辑器
+        // mirror 的旋转等价检测复用（同一公式构造 → dot 判定严格）
+        static glm::quat QuatFromEuler(const glm::vec3& r)
         {
             const glm::quat qx = glm::angleAxis(glm::radians(r.x), glm::vec3(1, 0, 0));
             const glm::quat qy = glm::angleAxis(glm::radians(r.y), glm::vec3(0, 1, 0));
             const glm::quat qz = glm::angleAxis(glm::radians(r.z), glm::vec3(0, 0, 1));
-            return SetRotationQuat(qy * qx * qz);
+            return qy * qx * qz;
         }
         // 四元数直写（UE FTransform 语义）：Gizmo 拖拽/物理写回用，
         // 不经欧拉往返 → 零漂移、无万向锁