fix: simplify sidebar to Applications + Starred + Admin footer

Remove Agents and Routes sections from sidebar. Layout is now:
Header (camel logo + Cameleer) → Search → Applications section →
Starred section (when items exist) → Footer (Admin + API Docs).

Admin accordion: clicking Admin navigates to /admin/rbac and
expands Admin section at top while collapsing Applications and
Starred. Clicking Applications exits admin mode.

Removed buildAgentTreeNodes and buildRouteTreeNodes from
sidebar-utils (no longer needed).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/sidebar-utils.ts

@@ -12,20 +12,12 @@ export interface SidebarRoute {
   routeState?: 'stopped' | 'suspended';
 }
 
-export interface SidebarAgent {
-  id: string;
-  name: string;
-  status: 'live' | 'stale' | 'dead';
-  tps?: number;
-}
-
 export interface SidebarApp {
   id: string;
   name: string;
   health: 'live' | 'stale' | 'dead';
   exchangeCount: number;
   routes: SidebarRoute[];
-  agents: SidebarAgent[];
 }
 
 /* ------------------------------------------------------------------ */
@@ -101,67 +93,6 @@ export function buildAppTreeNodes(
   }));
 }
 
-/**
- * Agents tree — one node per app, agents as children.
- * Paths: /agents/{appId}, /agents/{appId}/{agentId}
- * Badge shows "N/M live".
- */
-export function buildAgentTreeNodes(
-  apps: SidebarApp[],
-  statusDot: (health: string) => ReactNode,
-): SidebarTreeNode[] {
-  return apps.map((app) => {
-    const liveCount = app.agents.filter((a) => a.status === 'live').length;
-    return {
-      id: `agent:${app.id}`,
-      label: app.name,
-      icon: statusDot(app.health),
-      badge: `${liveCount}/${app.agents.length} live`,
-      path: `/agents/${app.id}`,
-      children: app.agents.map((a) => ({
-        id: `agent:${app.id}/${a.id}`,
-        label: a.name,
-        icon: statusDot(a.status),
-        badge: a.tps != null ? `${a.tps.toFixed(1)} msg/s` : undefined,
-        path: `/agents/${app.id}/${a.id}`,
-      })),
-    };
-  });
-}
-
-/**
- * Routes stats tree — one node per app, routes as children.
- * Paths: /routes/{appId}, /routes/{appId}/{routeId}
- */
-export function buildRouteTreeNodes(
-  apps: SidebarApp[],
-  statusDot: (health: string) => ReactNode,
-  chevron: () => ReactNode,
-  stopIcon?: () => ReactNode,
-  pauseIcon?: () => ReactNode,
-): SidebarTreeNode[] {
-  return apps.map((app) => ({
-    id: `route:${app.id}`,
-    label: app.name,
-    icon: statusDot(app.health),
-    badge: `${app.routes.length} routes`,
-    path: `/routes/${app.id}`,
-    children: app.routes.map((r) => ({
-      id: `route:${app.id}/${r.id}`,
-      label: r.name,
-      icon: r.routeState === 'stopped' && stopIcon
-        ? stopIcon()
-        : r.routeState === 'suspended' && pauseIcon
-          ? pauseIcon()
-          : chevron(),
-      badge: r.routeState
-        ? `${r.routeState.toUpperCase()} \u00b7 ${formatCount(r.exchangeCount)}`
-        : formatCount(r.exchangeCount),
-      path: `/routes/${app.id}/${r.id}`,
-    })),
-  }));
-}
-
 /**
  * Admin tree — static 6 nodes.
  */