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-TW.json

@@ -219,48 +219,19 @@
       "geofilesUpdateDialogDesc": "這將更新所有文件。",
       "geofilesUpdateAll": "全部更新",
       "geofileUpdatePopover": "地理檔案更新成功",
-      "customGeoTitle": "自訂 GeoSite / GeoIP",
-      "customGeoAdd": "新增",
-      "customGeoType": "類型",
-      "customGeoAlias": "別名",
-      "customGeoUrl": "URL",
-      "customGeoEnabled": "啟用",
-      "customGeoLastUpdated": "上次更新",
-      "customGeoExtColumn": "路由 (ext:…)",
-      "customGeoToastUpdateAll": "所有自訂來源已更新",
-      "customGeoActions": "操作",
-      "customGeoEdit": "編輯",
-      "customGeoDelete": "刪除",
-      "customGeoDownload": "立即更新",
-      "customGeoModalAdd": "新增自訂 geo",
-      "customGeoModalEdit": "編輯自訂 geo",
-      "customGeoModalSave": "儲存",
-      "customGeoDeleteConfirm": "刪除此自訂 geo 來源？",
-      "customGeoRoutingHint": "在路由規則中將值欄寫為 ext:檔案.dat:標籤（替換標籤）。",
-      "customGeoInvalidId": "無效的資源 ID",
-      "customGeoAliasesError": "載入自訂 geo 別名失敗",
-      "customGeoValidationAlias": "別名只能包含小寫字母、數字、- 和 _",
-      "customGeoValidationUrl": "URL 必須以 http:// 或 https:// 開頭",
-      "customGeoAliasPlaceholder": "a-z 0-9 _ -",
-      "customGeoAliasLabelSuffix": "（自訂）",
-      "customGeoToastList": "自訂 geo 清單",
-      "customGeoToastAdd": "新增自訂 geo",
-      "customGeoToastUpdate": "更新自訂 geo",
-      "customGeoToastDelete": "自訂 geofile「{{ .fileName }}」已刪除",
-      "customGeoToastDownload": "geofile「{{ .fileName }}」已更新",
-      "customGeoErrInvalidType": "類型必須是 geosite 或 geoip",
-      "customGeoErrAliasRequired": "請填寫別名",
-      "customGeoErrAliasPattern": "別名包含不允許的字元",
-      "customGeoErrAliasReserved": "此別名已保留",
-      "customGeoErrUrlRequired": "請填寫 URL",
-      "customGeoErrInvalidUrl": "URL 無效",
-      "customGeoErrUrlScheme": "URL 必須使用 http 或 https",
-      "customGeoErrUrlHost": "URL 主機無效",
-      "customGeoErrDuplicateAlias": "此類型已使用該別名",
-      "customGeoErrNotFound": "找不到自訂 geo 來源",
-      "customGeoErrDownload": "下載失敗",
-      "customGeoErrUpdateAllIncomplete": "有一個或多個自訂 geo 來源更新失敗",
-      "customGeoEmpty": "尚無自訂 geo 來源 — 點擊「新增」以建立",
+      "geodataTitle": "Geodata 自動更新",
+      "geodataHint": "Xray 會按排程下載這些檔案並熱重載，無需重啟。URL 必須為 HTTPS。檔案必須已存在於 bin 目錄中，Xray 才能對其更新。",
+      "geodataCron": "更新排程 (cron)",
+      "geodataOutbound": "透過出站下載（可選）",
+      "geodataFile": "檔案名稱",
+      "geodataAddFile": "新增檔案",
+      "geodataSaveRestart": "儲存並重啟 Xray",
+      "geodataConfirmTitle": "儲存 geodata 設定？",
+      "geodataConfirmContent": "將更新 Xray 設定範本並重啟 Xray。",
+      "geodataInvalidUrl": "每個檔案都需要 HTTPS 位址。",
+      "geodataInvalidFile": "檔案名稱必須是純檔名，例如 geosite_custom.dat（不能包含路徑）。",
+      "geodataInvalidCron": "Cron 必須為 5 段，例如 0 4 * * *",
+      "geodataEmpty": "尚未設定檔案。路由規則中可透過 ext:geosite_custom.dat:category 引用檔案。",
       "dontRefresh": "安裝中，請勿重新整理此頁面",
       "logs": "記錄",
       "config": "配置",