右键不自动回正，改为中键回正（保留动画）

src/scene/CesiumGlobe.js

@@ -228,8 +228,9 @@ export class CesiumGlobe {
       },
     ];
 
-    // 阻止右键弹出浏览器菜单
+    // 阻止右键弹出浏览器菜单；阻止中键触发浏览器自动滚动
     scene.canvas.addEventListener('contextmenu', (e) => e.preventDefault());
+    scene.canvas.addEventListener('mousedown', (e) => { if (e.button === 1) e.preventDefault(); });
 
     // 精细化渲染：高清 + 精细地形
     scene.globe.maximumScreenSpaceError = 1.0; // 更精细的地形起伏
@@ -364,16 +365,16 @@ export class CesiumGlobe {
     viewer.screenSpaceEventHandler.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_DOUBLE_CLICK);
   }
 
-  // 右键原生 tilt 松开后自动回位：按下记录相机状态，松开恢复（并清掉 tilt 惯性余力）
+  // 右键原生 tilt：按下记录相机状态；松开不回正。中键：回正（flyTo 动画飞回按下前状态）
   _setupRightRestore() {
     const scene = this.viewer.scene;
     const camera = this.viewer.camera;
     const handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
-    this._rightRestore = null;
+    this._rightHome = null;
 
     handler.setInputAction(() => {
       camera.cancelFlight(); // 取消可能仍在进行的回正动画
-      this._rightRestore = {
+      this._rightHome = {
         position: Cesium.Cartesian3.clone(camera.position),
         direction: Cesium.Cartesian3.clone(camera.direction),
         up: Cesium.Cartesian3.clone(camera.up),
@@ -381,18 +382,22 @@ export class CesiumGlobe {
     }, Cesium.ScreenSpaceEventType.RIGHT_DOWN);
 
     handler.setInputAction(() => {
-      if (!this._rightRestore) return;
-      const s = this._rightRestore;
-      this._rightRestore = null;
+      // 松开右键：只清掉 tilt 惯性余力，不回正
       const tiltState = scene.screenSpaceCameraController._lastInertiaTiltMovement;
       if (tiltState) tiltState.inertiaEnabled = false;
-      // 回正改用 flyTo 渐变，而不是瞬间 setView
+    }, Cesium.ScreenSpaceEventType.RIGHT_UP);
+
+    handler.setInputAction(() => {
+      // 中键：回正（动画飞回）
+      if (!this._rightHome) return;
+      const s = this._rightHome;
+      this._rightHome = null;
       camera.flyTo({
         destination: s.position,
         orientation: { direction: s.direction, up: s.up },
         duration: 0.5,
       });
-    }, Cesium.ScreenSpaceEventType.RIGHT_UP);
+    }, Cesium.ScreenSpaceEventType.MIDDLE_DOWN);
 
     this._rightRestoreHandler = handler;
   }