Send user trajectories from the user list into a focused live map

- Open 「用户轨迹」 straight on the live map instead of a drawer, carrying the
  server, the focused user and a start/end window through the plugin page hash.
- Default that window to one hour before the user's last seen time and keep the
  plugin page query available to bundles through the host context.
- Replace the time range preset gate with always visible start/end datetime
  fields plus a quick-range select, so the user list rebuilds from the window.
- Drop the bulky trajectory list and draw one compact colour legend under the
  map, keeping a stable colour per identity and restricting vehicle tracks to
  the vehicles the selected users actually rode.

plugins/examples/scum-server-plugin/manifest.json

@@ -3,7 +3,7 @@
   "id": "game.scum",
   "name": "SCUM Server",
   "description": "First-party SCUM game server operations plugin with platform-mediated lifecycle and plugin-owned RCON data flows.",
-  "version": "0.1.22",
+  "version": "0.1.23",
   "kind": "game-plugin",
   "tags": [
     "scum",