feat: Heritage Globe - 中国文物全球分布地图

- Next.js + MapLibre GL 3D 地球
- CARTO dark-matter vector 底图
- 动态星空背景（闪烁、漂移、流星）
- 经纬网格线（graticule）
- 文物数据图层与朝代/类别筛选
- 中国风信息弹窗
- 中英双语 i18n
- LayerPanel + MapControls 浮动面板

messages/zh.json

@@ -0,0 +1,85 @@
+{
+  "nav": {
+    "title": "中国文物全球分布",
+    "search": "搜索文物或博物馆...",
+    "languageSwitch": "English",
+    "mapLink": "文物地图",
+    "signIn": "登录",
+    "home": "首页",
+    "about": "关于",
+    "privacy": "隐私",
+    "terms": "条款"
+  },
+  "map": {
+    "layers": "图层",
+    "filters": "筛选器",
+    "reset": "重置",
+    "zoomIn": "放大",
+    "zoomOut": "缩小",
+    "myLocation": "定位到我的位置"
+  },
+  "sidebar": {
+    "operatingRelics": "文物分布",
+    "technology": "类别",
+    "sortByName": "按名称排序",
+    "sortByImportance": "按重要性排序",
+    "showAll": "显示全部",
+    "hideAll": "隐藏全部",
+    "displayHint": "勾选图层以控制文物在地图上的显示。可按朝代与类别分别筛选。",
+    "clustering": "聚类显示",
+    "labels": "地点标签",
+    "on": "开启",
+    "off": "关闭",
+    "savedViews": "保存视图",
+    "cinematic": "电影视图",
+    "share": "分享链接",
+    "screenshot": "截图",
+    "feedback": "反馈",
+    "cards": "卡片面板"
+  },
+  "dynasty": {
+    "shang": "商",
+    "zhou": "周",
+    "qin": "秦",
+    "han": "汉",
+    "tang": "唐",
+    "song": "宋",
+    "yuan": "元",
+    "ming": "明",
+    "qing": "清"
+  },
+  "category": {
+    "bronze": "青铜器",
+    "porcelain": "瓷器",
+    "painting": "书画",
+    "jade": "玉器",
+    "sculpture": "雕塑",
+    "calligraphy": "书法",
+    "textile": "织物",
+    "gold": "金银器",
+    "lacquer": "漆器",
+    "ceramic": "陶器"
+  },
+  "filter": {
+    "dynasty": "朝代筛选",
+    "category": "类别筛选",
+    "country": "国家筛选",
+    "protectionLevel": "保护级别"
+  },
+  "detail": {
+    "name": "名称",
+    "dynasty": "朝代",
+    "category": "类别",
+    "year": "年代",
+    "currentLocation": "当前收藏地",
+    "museum": "收藏机构",
+    "description": "描述",
+    "protectionLevel": "保护级别",
+    "viewMore": "查看详情"
+  },
+  "stats": {
+    "totalRelics": "文物总数",
+    "countries": "分布国家",
+    "museums": "收藏机构"
+  }
+}