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.

platform_web/contracts/page.ts

@@ -10,6 +10,7 @@ export interface PageParams {
   serverId?: string;
   pluginId?: string;
   routeKey?: string;
+  pageQuery?: Record<string, string>;
 }
 
 export interface PageRoute {

platform_web/contracts/pluginBridge.ts

@@ -121,6 +121,7 @@ export interface PluginBridgeHostContext {
   pluginId: string;
   routeKey: string;
   serverInstanceId?: string;
+  pageQuery: Record<string, string>;
   themeTokens: PluginBridgeThemeTokens;
   permissions: PluginPermission[];
   bridgeActions: PluginBridgeAction[];