feat: 将 demo 项目转化为 HTTP 拨测监控工具

新增 YAML 配置解析（Bun 内置 YAML）、SQLite 数据存储（bun:sqlite）、按 interval 分组并发拨测引擎、REST API（/api/summary、/api/targets、/api/targets/:id/history、/api/targets/:id/trend）、React 前端 Dashboard（统计卡片、目标表格、可展开详情面板、recharts 趋势图）。CLI 简化为仅接受配置文件路径。移除 /api/demo 路由和相关 demo 代码。保留 /health、静态资源服务和 SPA fallback。

scripts/build.ts

@@ -98,14 +98,34 @@ ${assetEntries.join("\n")}
 async function writeGeneratedEntry() {
   await writeFile(
     generatedEntryPath,
-    `import { readRuntimeConfig } from "../src/server/config";
+    `import { loadConfig } from "../src/server/checker/config-loader";
+import { ProbeStore } from "../src/server/checker/store";
+import { ProbeEngine } from "../src/server/checker/engine";
 import { startServer } from "../src/server/server";
+import { readRuntimeConfig } from "../src/server/config";
 import { staticAssets } from "./static-assets";
 
-startServer({
-  config: readRuntimeConfig(),
-  mode: "production",
-  staticAssets,
+async function main() {
+  const { configPath } = readRuntimeConfig();
+  const config = await loadConfig(configPath);
+
+  const store = new ProbeStore(config.dataDir + "/probe.db");
+  store.syncTargets(config.targets);
+
+  const engine = new ProbeEngine(store, config.targets);
+  engine.start();
+
+  startServer({
+    config: { host: config.host, port: config.port },
+    mode: "production",
+    staticAssets,
+    store,
+  });
+}
+
+void main().catch((error) => {
+  console.error("启动失败:", error instanceof Error ? error.message : error);
+  process.exit(1);
 });
 `,
   );