fix(hub): default to OpenRouter Sonnet model

hub/src/server.ts

@@ -8,12 +8,12 @@
  * loop are ADR-0003-authorized (chat must match binding).
  *
  * Env (see .env.example):
- *  DATABASE_URL, OPENROUTER_API_KEY, FEISHU_APP_ID/SECRET/BOT_OPEN_ID, PORT
+ *  DATABASE_URL, ANTHROPIC_AUTH_TOKEN, FEISHU_APP_ID/SECRET/BOT_OPEN_ID, PORT
  */
 import "dotenv/config";
 import Fastify from "fastify";
 import { prisma } from "./db.js";
-import { InMemoryModelRegistry } from "./agent/models.js";
+import { createDefaultModelRegistry } from "./agent/defaultModels.js";
 import { createLarkClient, startFeishuListenerWithClient, type FeishuRuntime } from "./feishu/client.js";
 import { makeTriggerHandler } from "./feishu/trigger.js";
 
@@ -54,17 +54,9 @@ async function main(): Promise<void> {
 
   app.get("/api/healthz", async () => ({ ok: true, ts: Date.now() }));
 
-  // Model registry (role-as-data, ADR-0017). Claude Code SDK uses model
-  // aliases like 'sonnet', 'haiku' — the registry maps roles to these.
-  const models = new InMemoryModelRegistry(
-    [
-      { id: "claude-sonnet-4-20250514", label: "Claude Sonnet", toolCapable: true },
-    ],
-    [
-      { id: "draft", label: "草稿", defaultModel: "claude-sonnet-4-20250514" },
-      { id: "review", label: "审校", defaultModel: "claude-sonnet-4-20250514" },
-    ],
-  );
+  // Model registry (role-as-data, ADR-0017). Defaults are OpenRouter model
+  // slugs; ANTHROPIC_DEFAULT_SONNET_MODEL can override the role default.
+  const models = createDefaultModelRegistry();
 
   // --- Feishu listener ---
   const feishuConfig = { appId: feishuAppId, appSecret: feishuAppSecret, botOpenId: feishuBotOpenId };