Replace Three.js globe with Cesium

Migrate the globe view to a Cesium viewer with Esri satellite
imagery and terrain, dropping the custom blue-marble texture and
dot-bead rendering. Add vite-plugin-cesium and a container element
for the viewer.

Also rework the binder leather and suede materials with dedicated
normal maps, and refine timeline labels and page hole sizing.

src/data/worldMap.js

@@ -1,49 +0,0 @@
-// 简化的大陆轮廓（经纬度多边形），用于生成点阵风格的地球。
-// 坐标 [lng, lat]，用于艺术化表达，不求精确。
-
-export const CONTINENTS = [
-  { name: '北美洲', poly: [[-168,66],[-140,70],[-90,72],[-60,60],[-55,52],[-65,45],[-75,35],[-80,25],[-90,29],[-97,26],[-97,22],[-105,20],[-110,23],[-117,33],[-125,40],[-125,49],[-135,58],[-150,60],[-165,60],[-168,66]] },
-  { name: '格陵兰', poly: [[-45,60],[-55,70],[-40,83],[-20,80],[-22,70],[-32,60],[-45,60]] },
-  { name: '南美洲', poly: [[-77,8],[-60,5],[-51,2],[-35,-5],[-40,-15],[-48,-25],[-58,-35],[-65,-40],[-68,-50],[-72,-53],[-75,-45],[-72,-35],[-70,-20],[-76,-12],[-80,-3],[-77,8]] },
-  { name: '欧洲', poly: [[-9,43],[-9,37],[3,43],[10,44],[12,48],[8,54],[10,58],[18,58],[25,60],[30,60],[40,68],[30,70],[20,70],[10,64],[5,62],[-5,58],[-9,43]] },
-  { name: '不列颠', poly: [[-5,50],[-2,53],[-2,57],[-5,58],[-4,54],[-5,50]] },
-  { name: '冰岛', poly: [[-22,64],[-18,66],[-14,65],[-20,63],[-22,64]] },
-  { name: '非洲', poly: [[-6,35],[10,37],[20,32],[32,31],[37,18],[43,11],[40,-3],[40,-11],[35,-20],[30,-30],[20,-35],[15,-28],[12,-18],[13,-9],[8,5],[0,5],[-9,5],[-15,10],[-17,15],[-13,25],[-6,35]] },
-  { name: '马达加斯加', poly: [[44,-12],[48,-16],[50,-16],[47,-25],[44,-22],[44,-12]] },
-  { name: '阿拉伯', poly: [[35,30],[43,12],[52,15],[58,22],[55,26],[48,30],[35,30]] },
-  { name: '亚洲', poly: [[27,40],[45,42],[55,46],[60,50],[70,55],[90,60],[120,68],[160,70],[180,66],[180,60],[160,58],[140,52],[135,44],[125,39],[120,32],[112,21],[108,13],[104,8],[98,8],[95,16],[92,22],[85,20],[80,12],[77,7],[74,14],[70,21],[66,25],[60,25],[55,27],[48,29],[40,31],[32,34],[27,40]] },
-  { name: '日本', poly: [[130,31],[140,35],[142,42],[145,44],[140,40],[135,34],[130,31]] },
-  { name: '东南亚', poly: [[98,6],[102,-2],[106,-6],[114,-8],[120,-3],[110,3],[104,2],[98,6]] },
-  { name: '新几内亚', poly: [[131,-1],[138,-3],[145,-6],[147,-9],[140,-8],[134,-4],[131,-1]] },
-  { name: '澳大利亚', poly: [[114,-22],[122,-18],[130,-12],[138,-17],[146,-19],[153,-28],[150,-37],[140,-38],[130,-32],[120,-34],[114,-22]] },
-  { name: '新西兰', poly: [[172,-34],[175,-38],[178,-38],[173,-41],[168,-46],[167,-45],[170,-40],[172,-34]] },
-];
-
-// 判断点是否在多边形内（射线法）
-function pointInPoly(lng, lat, poly) {
-  let inside = false;
-  for (let i = 0, j = poly.length - 1; i < poly.length; j = i++) {
-    const [xi, yi] = poly[i];
-    const [xj, yj] = poly[j];
-    if ((yi > lat) !== (yj > lat) && lng < ((xj - xi) * (lat - yi)) / (yj - yi) + xi) {
-      inside = !inside;
-    }
-  }
-  return inside;
-}
-
-// 生成陆地点阵（经纬度网格）
-export function landPoints(step = 2.2) {
-  const pts = [];
-  for (let lat = -62; lat <= 74; lat += step) {
-    for (let lng = -180; lng < 180; lng += step) {
-      for (const c of CONTINENTS) {
-        if (pointInPoly(lng, lat, c.poly)) {
-          pts.push([lng, lat]);
-          break;
-        }
-      }
-    }
-  }
-  return pts;
-}