feat: bootstrap personal stock agent

tests/symbols.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest";
+import { normalizeSymbol } from "../src/agent/symbols";
+
+describe("normalizeSymbol", () => {
+  it.each([
+    ["600519", { symbol: "600519", market: "CN", display: "600519.SS" }],
+    ["000001.SZ", { symbol: "000001", market: "CN", display: "000001.SZ" }],
+    ["00700.hk", { symbol: "00700", market: "HK", display: "00700.HK" }],
+    ["AAPL", { symbol: "AAPL", market: "US", display: "AAPL" }],
+    ["msft.us", { symbol: "MSFT", market: "US", display: "MSFT" }]
+  ])("normalizes %s", (input, expected) => {
+    expect(normalizeSymbol(input)).toEqual(expected);
+  });
+
+  it("rejects empty and unsupported symbols", () => {
+    expect(() => normalizeSymbol("")).toThrow("Stock symbol is required");
+    expect(() => normalizeSymbol("!!!")).toThrow("Unsupported stock symbol");
+  });
+});