feat(gateway): add system.services and dashboard services grid

src/gateway/server.ts

@@ -27,6 +27,7 @@ import {
   createRoutingHandlers,
   createHistoryHandlers,
 } from './handlers/index.js';
+import { discoverServices } from './handlers/services.js';
 import type { TokenUsageEntry } from './handlers/system.js';
 import type { SessionManager } from '../session/manager.js';
 import type { Config } from '../config/index.js';
@@ -39,6 +40,7 @@ import type { MemoryStore } from '../memory/store.js';
 import type { CommandRegistry } from '../commands/index.js';
 import type { ComponentRegistry } from '../intents/index.js';
 import type { RoutingPolicy } from '../routing/index.js';
+import type { ChannelRegistry } from '../channels/index.js';
 
 export interface GatewayServerConfig {
   port: number;
@@ -58,7 +60,7 @@ export interface GatewayServerConfig {
   config?: Config;
   /** Optional callback for system.restart. Should trigger graceful shutdown + process restart. */
   restart?: () => Promise<void>;
-  channelRegistry?: { list(): Array<{ readonly name: string; readonly status: string }> };
+  channelRegistry?: ChannelRegistry;
   /** Optional webhook handler for inbound webhook HTTP routes. */
   webhookHandler?: WebhookHandler;
   /** Optional Gmail handler for Pub/Sub push notifications. */
@@ -116,6 +118,9 @@ export class GatewayServer {
       getChannels: this.config.channelRegistry
         ? () => this.config.channelRegistry!.list().map(a => ({ name: a.name, status: a.status }))
         : undefined,
+      getServices: this.config.config && this.config.channelRegistry
+        ? () => discoverServices(this.config.config!, this.config.channelRegistry!)
+        : undefined,
       getUsage: () => ({
         totalSessions: this.config.sessionManager.listSessions().length,
         activeConnections: this.sessionBridge.connectionCount,