Initial commit: Arb Pulse monolith with CI and optional Fly deploy.

Real-time BTC cross-exchange arbitrage detection (Kraken, Bybit, OKX, Binance)
with React dashboard, GitHub Actions CI, and documented Fly.io deploy workflow.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/config-api.ts

@@ -0,0 +1,28 @@
+import type { PublicConfig, ExchangeId } from "./types";
+
+export interface ConfigPatch {
+  minNetProfitPct?: number;
+  maxTradeBtc?: number;
+  flickerConfirmMs?: number;
+  activeExchanges?: Partial<Record<ExchangeId, boolean>>;
+}
+
+async function parseJson<T>(res: Response): Promise<T> {
+  const body = (await res.json()) as { success: boolean; data?: T; error?: string };
+  if (!body.success) throw new Error(body.error ?? "request failed");
+  return body.data as T;
+}
+
+export async function getConfig(): Promise<PublicConfig> {
+  const res = await fetch("/api/config");
+  return parseJson<PublicConfig>(res);
+}
+
+export async function patchConfig(patch: ConfigPatch): Promise<PublicConfig> {
+  const res = await fetch("/api/config", {
+    method: "PATCH",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(patch),
+  });
+  return parseJson<PublicConfig>(res);
+}