feat: add stock detail page with chart, position, and orders

- Add /api/alpaca/orders endpoint for order history
- Add TradingView chart component for candlestick visualization
- Add /analyze/:ticker route with position and orders display
- Make ticker cells in analyze page clickable for navigation

tests/orders.test.ts

@@ -0,0 +1,8 @@
+import { test, expect } from "@playwright/test";
+
+test("GET /api/alpaca/orders returns orders list", async ({ page }) => {
+  const res = await page.request.get("/api/alpaca/orders");
+  expect(res.ok()).toBeTruthy();
+  const data = await res.json();
+  expect(data.orders).toBeDefined();
+});