fix: use request URL for base URL in stock detail loader

- Fix TypeError from undefined BASE_URL in loader
- Use request.url to construct base URL dynamically

app/routes/analyze.ticker.tsx

@@ -10,16 +10,20 @@ interface LoaderData {
   orders: any[];
 }
 
-export async function loader({ params }: { params: { ticker: string } }) {
+export async function loader({ params, request }: { params: { ticker: string }; request: Request }) {
   const ticker = params.ticker?.toUpperCase() || "";
   
+  // Build base URL from request for server-side fetches
+  const url = new URL(request.url);
+  const baseUrl = `${url.protocol}//${url.host}`;
+  
   // Fetch position
-  const posRes = await fetch(`${process.env.BASE_URL}/api/alpaca/positions`);
+  const posRes = await fetch(`${baseUrl}/api/alpaca/positions`);
   const positions = posRes.ok ? await posRes.json() : [];
   const position = positions.find((p: any) => p.ticker === ticker)?.qty ?? null;
 
   // Fetch orders
-  const ordRes = await fetch(`${process.env.BASE_URL}/api/alpaca/orders`);
+  const ordRes = await fetch(`${baseUrl}/api/alpaca/orders`);
   const ordersData = ordRes.ok ? await ordRes.json() : { orders: [] };
   const orders = ordersData.orders?.filter((o: any) => o.symbol === ticker) || [];