refactor: replace custom geo manager with Xray-core native geodata auto-update

Remove the panel-side custom geo download feature (service, controller,
/panel/api/custom-geo/* endpoints, CustomGeoResource model, UI tab) in
favor of Xray-core's native geodata section
(https://xtls.github.io/config/geodata.html).

- pass the top-level "geodata" key through xray.Config so it survives
  the template round-trip into the generated config
- add a Geodata Auto-Update section to the Xray Updates modal that
  edits geodata (cron schedule, download outbound, asset list) in the
  config template and restarts Xray on save
- previously downloaded geo files in the bin folder keep working in
  ext: routing rules; the orphaned custom_geo_resources table is left
  in place so existing source URLs stay recoverable

internal/web/translation/zh-CN.json

@@ -219,48 +219,19 @@
       "geofilesUpdateDialogDesc": "这将更新所有文件。",
       "geofilesUpdateAll": "全部更新",
       "geofileUpdatePopover": "地理文件更新成功",
-      "customGeoTitle": "自定义 GeoSite / GeoIP",
-      "customGeoAdd": "添加",
-      "customGeoType": "类型",
-      "customGeoAlias": "别名",
-      "customGeoUrl": "URL",
-      "customGeoEnabled": "启用",
-      "customGeoLastUpdated": "上次更新",
-      "customGeoExtColumn": "路由 (ext:…)",
-      "customGeoToastUpdateAll": "所有自定义来源已更新",
-      "customGeoActions": "操作",
-      "customGeoEdit": "编辑",
-      "customGeoDelete": "删除",
-      "customGeoDownload": "立即更新",
-      "customGeoModalAdd": "添加自定义 geo",
-      "customGeoModalEdit": "编辑自定义 geo",
-      "customGeoModalSave": "保存",
-      "customGeoDeleteConfirm": "删除此自定义 geo 源？",
-      "customGeoRoutingHint": "在路由规则中将值列写为 ext:文件.dat:标签（替换标签）。",
-      "customGeoInvalidId": "无效的资源 ID",
-      "customGeoAliasesError": "加载自定义 geo 别名失败",
-      "customGeoValidationAlias": "别名只能包含小写字母、数字、- 和 _",
-      "customGeoValidationUrl": "URL 必须以 http:// 或 https:// 开头",
-      "customGeoAliasPlaceholder": "a-z 0-9 _ -",
-      "customGeoAliasLabelSuffix": "（自定义）",
-      "customGeoToastList": "自定义 geo 列表",
-      "customGeoToastAdd": "添加自定义 geo",
-      "customGeoToastUpdate": "更新自定义 geo",
-      "customGeoToastDelete": "自定义 geofile「{{ .fileName }}」已删除",
-      "customGeoToastDownload": "geofile「{{ .fileName }}」已更新",
-      "customGeoErrInvalidType": "类型必须是 geosite 或 geoip",
-      "customGeoErrAliasRequired": "请填写别名",
-      "customGeoErrAliasPattern": "别名包含不允许的字符",
-      "customGeoErrAliasReserved": "该别名已保留",
-      "customGeoErrUrlRequired": "请填写 URL",
-      "customGeoErrInvalidUrl": "URL 无效",
-      "customGeoErrUrlScheme": "URL 必须使用 http 或 https",
-      "customGeoErrUrlHost": "URL 主机无效",
-      "customGeoErrDuplicateAlias": "此类型下已使用该别名",
-      "customGeoErrNotFound": "未找到自定义 geo 源",
-      "customGeoErrDownload": "下载失败",
-      "customGeoErrUpdateAllIncomplete": "有一个或多个自定义 geo 源更新失败",
-      "customGeoEmpty": "暂无自定义 geo 源 — 点击「添加」以创建",
+      "geodataTitle": "Geodata 自动更新",
+      "geodataHint": "Xray 会按计划下载这些文件并热重载，无需重启。URL 必须为 HTTPS。文件必须已存在于 bin 目录中，Xray 才能对其更新。",
+      "geodataCron": "更新计划 (cron)",
+      "geodataOutbound": "通过出站下载（可选）",
+      "geodataFile": "文件名",
+      "geodataAddFile": "添加文件",
+      "geodataSaveRestart": "保存并重启 Xray",
+      "geodataConfirmTitle": "保存 geodata 设置？",
+      "geodataConfirmContent": "将更新 Xray 配置模板并重启 Xray。",
+      "geodataInvalidUrl": "每个文件都需要 HTTPS 地址。",
+      "geodataInvalidFile": "文件名必须是纯文件名，例如 geosite_custom.dat（不能包含路径）。",
+      "geodataInvalidCron": "Cron 必须为 5 段，例如 0 4 * * *",
+      "geodataEmpty": "尚未配置文件。路由规则中可通过 ext:geosite_custom.dat:category 引用文件。",
       "dontRefresh": "安装中，请勿刷新此页面",
       "logs": "日志",
       "config": "配置",