Save ticker and last decision to DB; add order suggestion UI; upsert stocks with execution details; ensure analysis saves ticker

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/routes/api/stocks/index.ts

@@ -23,8 +23,26 @@ export async function action({ request }: { request: Request }) {
     return Response.json({ success: true });
   }
 
-  const stock = await db.stock.create({
-    data: { ticker },
+  // Optional fields to save/update
+  const lastDecision = formData.get("lastDecision")?.toString();
+  const lastExplanation = formData.get("lastExplanation")?.toString();
+  const lastExecutionPlan = formData.get("lastExecutionPlan")?.toString();
+
+  // Upsert the stock record so ticker is ensured and optional fields are saved
+  const stock = await db.stock.upsert({
+    where: { ticker },
+    update: {
+      lastDecision: lastDecision ?? undefined,
+      lastExplanation: lastExplanation ?? undefined,
+      lastExecutionPlan: lastExecutionPlan ?? undefined,
+    },
+    create: {
+      ticker,
+      lastDecision: lastDecision ?? undefined,
+      lastExplanation: lastExplanation ?? undefined,
+      lastExecutionPlan: lastExecutionPlan ?? undefined,
+    },
   });
+
   return Response.json(stock);
 }