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/utils/pluginBridgeHost.ts

@@ -13,6 +13,7 @@ export function createPluginBridgeHostContext(input: {
   plugin: PluginBridgeManifestContract;
   routeKey: string;
   serverInstanceId?: string;
+  pageQuery?: Record<string, string>;
   themeTokens: PluginBridgeThemeTokens;
 }): PluginBridgeHostContext {
   const page = input.plugin.pages.find((candidate) => candidate.key === input.routeKey);
@@ -26,6 +27,7 @@ export function createPluginBridgeHostContext(input: {
     pluginId: input.plugin.id,
     routeKey: input.routeKey,
     serverInstanceId: input.serverInstanceId,
+    pageQuery: { ...(input.pageQuery ?? {}) },
     themeTokens: input.themeTokens,
     permissions,
     bridgeActions,