refactor(hub): Vercel AI SDK → Claude Code SDK

用 @anthropic-ai/claude-agent-sdk 的 query() 替换 Vercel AI SDK 的
streamText。SDK 自带 Read/Write/Bash/Glob/Grep 工具——read_file/
write_file/list_files/cph_check/cph_build 全部不需要了,Bash 跑
cph 直接。

UX 同时改成 workbuddy 风格:
- 收到 @bot → 表情回复(👍)确认收到,不发'已开始处理'
- agent 回复作为文本流式发送(text-as-card patch,markdown 渲染)
- 超长自动续发新消息,不截断
- 完成/出错不再额外发状态消息
- 去掉卡片(model选择器/取消按钮)

ADR-0017 更新:放弃 provider-agnostic,Claude Code SDK 是 Anthropic
专有。换来:compaction、工具审批、partial message 流式、成熟 agent
loop。

tsc rc=0。旧文件(workspace.ts/cph.ts/provider.ts/tools.ts)暂留,
下个 commit 清理。

hub/src/server.ts

@@ -13,13 +13,8 @@
 import "dotenv/config";
 import Fastify from "fastify";
 import { prisma } from "./db.js";
-import { createModelFactory } from "./agent/provider.js";
 import { InMemoryModelRegistry } from "./agent/models.js";
-import { ToolRegistry, feishuContextTool } from "./agent/tools.js";
-import { readFileTool, writeFileTool, listFilesTool } from "./agent/workspace.js";
-import { cphCheckTool, cphBuildTool } from "./agent/cph.js";
 import { createLarkClient, startFeishuListenerWithClient, type FeishuRuntime } from "./feishu/client.js";
-import { readFeishuContext } from "./feishu/read.js";
 import { makeTriggerHandler } from "./feishu/trigger.js";
 
 function requireEnv(name: string): string {
@@ -33,8 +28,7 @@ function requireEnv(name: string): string {
 
 async function main(): Promise<void> {
   const databaseUrl = requireEnv("DATABASE_URL");
-  void databaseUrl; // prisma reads DATABASE_URL from env directly
-  requireEnv("OPENROUTER_API_KEY");
+  void databaseUrl;
   const feishuAppId = requireEnv("FEISHU_APP_ID");
   const feishuAppSecret = requireEnv("FEISHU_APP_SECRET");
   const feishuBotOpenId = requireEnv("FEISHU_BOT_OPEN_ID");
@@ -44,52 +38,22 @@ async function main(): Promise<void> {
 
   app.get("/api/healthz", async () => ({ ok: true, ts: Date.now() }));
 
-  // --- Agent seam wiring ---
-  const modelFactory = createModelFactory();
+  // 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: "z-ai/glm-4.6", label: "GLM-4.6", toolCapable: true },
-      { id: "anthropic/claude-3.5-sonnet", label: "Claude 3.5 Sonnet", toolCapable: true },
+      { id: "claude-sonnet-4-20250514", label: "Claude Sonnet", toolCapable: true },
     ],
     [
-      {
-        id: "draft",
-        label: "草稿",
-        defaultModel: "z-ai/glm-4.6",
-        systemPrompt: undefined,
-        // Drafting needs full workspace + cph access.
-        tools: ["read_file", "write_file", "list_files", "cph_check", "cph_build", "feishu_read_context"],
-      },
-      {
-        id: "review",
-        label: "审校",
-        defaultModel: "anthropic/claude-3.5-sonnet",
-        systemPrompt: undefined,
-        // Review is read-only on artifacts; no write_file, no build.
-        tools: ["read_file", "list_files", "cph_check", "feishu_read_context"],
-      },
+      { id: "draft", label: "草稿", defaultModel: "claude-sonnet-4-20250514" },
+      { id: "review", label: "审校", defaultModel: "claude-sonnet-4-20250514" },
     ],
   );
 
-  // Build the lark client first — tools that call Feishu APIs hold it from boot.
+  // --- Feishu listener ---
   const feishuConfig = { appId: feishuAppId, appSecret: feishuAppSecret, botOpenId: feishuBotOpenId };
   const larkClient = createLarkClient(feishuConfig);
-  const feishuRt: FeishuRuntime = { client: larkClient, logger: app.log };
-
-  const tools = new ToolRegistry();
-  // ADR-0003: the handler enforces chat==boundChat before any API call;
-  // real read wraps @larksuiteoapi/node-sdk's im.v1.message get/list.
-  tools.register("feishu_read_context", feishuContextTool(readFeishuContext, feishuRt));
-  // Workspace file tools (ADR-0007 directory tree, path-confined).
-  tools.register("read_file", readFileTool);
-  tools.register("write_file", writeFileTool);
-  tools.register("list_files", listFilesTool);
-  // cph CLI tools (ADR-0016 version contract enforced by cph itself).
-  tools.register("cph_check", cphCheckTool);
-  tools.register("cph_build", cphBuildTool);
-
-  // --- Feishu listener (reuses the same lark client) ---
-  const trigger = makeTriggerHandler({ prisma, modelFactory, tools, models, logger: app.log });
+  const trigger = makeTriggerHandler({ prisma, models, logger: app.log });
   startFeishuListenerWithClient(feishuConfig, larkClient, app.log, trigger);
 
   app.listen({ port, host: "0.0.0.0" }, (err, address) => {