feat: bootstrap personal stock agent

tests/watchlistStore.test.ts

@@ -0,0 +1,44 @@
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { WatchlistStore } from "../src/agent/watchlistStore";
+
+let tempDir: string | undefined;
+
+afterEach(async () => {
+  if (tempDir) {
+    await rm(tempDir, { force: true, recursive: true });
+    tempDir = undefined;
+  }
+});
+
+describe("WatchlistStore", () => {
+  it("adds normalized stocks once and persists them", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "stock-agent-"));
+    const path = join(tempDir, "watchlist.json");
+    const store = new WatchlistStore(path);
+
+    await store.add("aapl", "Apple");
+    await store.add("AAPL", "Duplicate");
+    await store.add("00700.HK", "Tencent");
+
+    expect(await store.list()).toEqual([
+      expect.objectContaining({ display: "AAPL", market: "US", name: "Apple" }),
+      expect.objectContaining({ display: "00700.HK", market: "HK", name: "Tencent" })
+    ]);
+
+    const reloaded = new WatchlistStore(path);
+    expect(await reloaded.list()).toHaveLength(2);
+  });
+
+  it("removes stocks by any supported symbol form", async () => {
+    tempDir = await mkdtemp(join(tmpdir(), "stock-agent-"));
+    const store = new WatchlistStore(join(tempDir, "watchlist.json"));
+
+    await store.add("600519", "Kweichow Moutai");
+    await store.remove("600519.SS");
+
+    expect(await store.list()).toEqual([]);
+  });
+});