feat: complete production-quality Model Router AI traffic control platform

frontend/src/lib/api.ts

@@ -0,0 +1,17 @@
+const API_BASE = 'http://localhost:8000';
+
+export async function fetchApi<T>(endpoint: string, options?: RequestInit): Promise<T> {
+  const url = endpoint.startsWith('http') ? endpoint : `${API_BASE}${endpoint}`;
+  const res = await fetch(url, {
+    ...options,
+    headers: {
+      'Content-Type': 'application/json',
+      ...(options?.headers || {}),
+    },
+  });
+  if (!res.ok) {
+    const errData = await res.json().catch(() => ({ detail: res.statusText }));
+    throw new Error(errData.detail || `Request failed with status ${res.status}`);
+  }
+  return res.json();
+}