Add production condition retrieval smoke test

apps/web/app/api/feedback/route.ts

@@ -0,0 +1,57 @@
+import { NextResponse } from "next/server";
+
+export const runtime = "nodejs";
+
+const API_GATEWAY_URL =
+  process.env.API_GATEWAY_URL ?? process.env.AI_SERVICE_URL ?? "http://localhost:8000";
+
+export async function POST(request: Request) {
+  let traceId: string;
+  let rating: "helpful" | "not_helpful";
+  let comment: string | null;
+  let conversationId: string | null;
+
+  try {
+    const body = await request.json();
+    traceId = typeof body?.traceId === "string" ? body.traceId.trim() : "";
+    rating = body?.rating;
+    comment = typeof body?.comment === "string" ? body.comment.trim() || null : null;
+    conversationId =
+      typeof body?.conversationId === "string" ? body.conversationId.trim() || null : null;
+  } catch {
+    return NextResponse.json({ error: "invalid_body" }, { status: 400 });
+  }
+
+  if (!/^[0-9a-f-]{36}$/i.test(traceId)) {
+    return NextResponse.json({ error: "invalid_trace_id" }, { status: 400 });
+  }
+  if (rating !== "helpful" && rating !== "not_helpful") {
+    return NextResponse.json({ error: "invalid_rating" }, { status: 400 });
+  }
+  if (comment && comment.length > 2000) {
+    return NextResponse.json({ error: "comment_too_long" }, { status: 400 });
+  }
+  if (conversationId && conversationId.length > 128) {
+    return NextResponse.json({ error: "conversation_id_too_long" }, { status: 400 });
+  }
+
+  const base = API_GATEWAY_URL.replace(/\/v1\/rag(?:\/query)?\/?$/, "");
+  try {
+    const upstream = await fetch(`${base}/v1/rag/feedback`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({
+        trace_id: traceId,
+        rating,
+        comment,
+        conversation_id: conversationId,
+      }),
+      cache: "no-store",
+      signal: AbortSignal.timeout(8_000),
+    });
+    const payload = await upstream.json().catch(() => ({}));
+    return NextResponse.json(payload, { status: upstream.status });
+  } catch {
+    return NextResponse.json({ error: "feedback_upstream_unavailable" }, { status: 503 });
+  }
+}