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

frontend/src/pages/clients/FilterDrawer.tsx

@@ -94,7 +94,7 @@ export default function FilterDrawer({
             value={filters.buckets}
             onChange={(v) => patch('buckets', v as string[])}
           >
-            <Space direction="vertical">
+            <Space orientation="vertical">
               {BUCKET_KEYS.map((k) => (
                 <Checkbox key={k} value={k}>
                   {bucketLabel(k, t)}