feat: stabilization + recipe edit/create UI

frontend/src/api/client.ts

@@ -0,0 +1,17 @@
+const BASE_URL = '/api'
+
+export async function apiFetch<T>(path: string, options?: RequestInit): Promise<T> {
+  const method = options?.method?.toUpperCase() || 'GET';
+  const headers: Record<string, string> = { ...options?.headers as Record<string, string> };
+  if (['POST', 'PUT', 'PATCH'].includes(method)) {
+    headers['Content-Type'] = headers['Content-Type'] || 'application/json';
+  }
+  const res = await fetch(`${BASE_URL}${path}`, {
+    ...options,
+    headers,
+  })
+  if (!res.ok) {
+    throw new Error(`API Error: ${res.status} ${res.statusText}`)
+  }
+  return res.json()
+}