style: update analyze API to use JSON body

app/routes.ts

@@ -4,4 +4,5 @@ export default [
   index("routes/landing.tsx"),
   route("api/alpaca/account", "routes/api/alpaca/account.ts"),
   route("stocks", "routes/stocks.tsx"),
+  route("analyze", "routes/analyze.tsx"),
 ] satisfies RouteConfig;

app/routes/api/analyze.ts

@@ -2,9 +2,9 @@ import { OpenRouterClient } from "../../lib/openrouter";
 import { TradingGraph } from "../../agents/tradingGraph";
 
 export async function action({ request }: { request: Request }) {
-  const formData = await request.formData();
-  const ticker = formData.get("ticker") as string;
-  const date = formData.get("date") as string;
+  const body = await request.json();
+  const ticker = body.ticker?.toUpperCase();
+  const date = body.date || new Date().toISOString().split("T")[0];
 
   if (!ticker) {
     return Response.json({ error: "ticker is required" }, { status: 400 });
@@ -19,7 +19,7 @@ export async function action({ request }: { request: Request }) {
   const graph = new TradingGraph(client);
 
   const input = {
-    financialData: `Financial data for ${ticker} as of ${date || "latest"}`,
+    financialData: `Financial data for ${ticker} as of ${date}`,
     technicalData: {
       prices: [100, 102, 101, 103, 105],
       sma: 102,
@@ -35,7 +35,7 @@ export async function action({ request }: { request: Request }) {
 
   try {
     const decision = await graph.propagate(ticker, input);
-    return Response.json({ decision, ticker, date });
+    return Response.json(decision);
   } catch (error) {
     const message = error instanceof Error ? error.message : "Unknown error";
     return Response.json({ error: message }, { status: 500 });