feat(channels): add google chat adapter and webhook route

src/daemon/channels.ts

@@ -1,6 +1,6 @@
 import type { Config } from '../config/index.js';
 import type { HookEngine } from '../hooks/index.js';
-import { ChannelRegistry, TelegramAdapter, WebChatAdapter, DiscordAdapter, SlackAdapter, WhatsAppAdapter, MatrixAdapter, SignalAdapter, TeamsAdapter, PairingManager } from '../channels/index.js';
+import { ChannelRegistry, TelegramAdapter, WebChatAdapter, DiscordAdapter, SlackAdapter, WhatsAppAdapter, MatrixAdapter, SignalAdapter, TeamsAdapter, GoogleChatAdapter, PairingManager } from '../channels/index.js';
 import { CronScheduler, WebhookHandler, GmailWatcher } from '../automation/index.js';
 import type { GatewayServer } from '../gateway/index.js';
 
@@ -113,6 +113,19 @@ export function registerChannels(deps: ChannelsDeps): ChannelsResult {
     gateway.setTeamsHandler(teamsAdapter);
   }
 
+  // Register Google Chat adapter (if configured)
+  if (config.google_chat) {
+    const googleChatAdapter = new GoogleChatAdapter({
+      serviceAccountKeyFile: config.google_chat.service_account_key_file,
+      serviceAccountJson: config.google_chat.service_account_json,
+      webhookToken: config.google_chat.webhook_token,
+      allowedSpaceNames: config.google_chat.allowed_space_names.length > 0 ? config.google_chat.allowed_space_names : undefined,
+      requireMention: config.google_chat.require_mention,
+    });
+    channelRegistry.register(googleChatAdapter);
+    gateway.setGoogleChatHandler(googleChatAdapter);
+  }
+
   // Register WebChat adapter (wraps the gateway)
   const webChatAdapter = new WebChatAdapter({ gateway });
   channelRegistry.register(webChatAdapter);