feat(clipping): add hideSection and recoverSection methods

Add new methods for temporary section plane visibility control:
- hideSection(): Hide section plane temporarily (calls engine.clipping.disabled())
- recoverSection(): Recover hidden section plane (calls engine.clipping.recover())

Update SectionPlaneDialogManager to use hideSection() instead of direct API call.

src/managers/engine-manager.ts

@@ -302,6 +302,28 @@ export class EngineManager extends BaseManager {
         this.engineInstance.setSectionBoxRange(range);
     }
 
+    /**
+     * 隐藏剖切面（临时隐藏，可恢复）
+     * @remarks 配合 recoverSection() 使用
+     */
+    public hideSection(): void {
+        if (!this.engineInstance) {
+            return;
+        }
+        this.engineInstance.hideSection();
+    }
+
+    /**
+     * 恢复剖切面（从隐藏状态恢复）
+     * @remarks 恢复被 hideSection() 隐藏的剖切面
+     */
+    public recoverSection(): void {
+        if (!this.engineInstance) {
+            return;
+        }
+        this.engineInstance.recoverSection();
+    }
+
     /** 激活框选放大功能 */
     public activateZoomBox(): void {
         if (!this.engineInstance) {

src/managers/section-plane-dialog-manager.ts

@@ -48,10 +48,8 @@ export class SectionPlaneDialogManager extends BaseDialogManager {
     protected createContent(): HTMLElement {
         this.panel = new SectionPlanePanel({
             onHide: () => {
-                console.log('[SectionPlaneDialogManager] 隐藏');
-                if (this.registry.engine3d) {
-                    (this.registry.engine3d as any).engine?.clipping?.disabled();
-                }
+                console.log('[SectionPlaneDialogManager] 隐藏剖切面');
+                this.registry.engine3d?.hideSection();
             },
             onReverse: () => {
                 console.log('[SectionPlaneDialogManager] 反向 (not supported in new API)');