feat: добавил поддержку подписки на календарь и экспорт расписания лекций в формате .ics

frontend/src/api/client.ts

@@ -81,3 +81,30 @@ export function extractItems<T>(payload: T[] | { items?: T[] } | undefined): T[]
   if (Array.isArray(payload)) return payload
   return payload?.items ?? []
 }
+
+
+export async function apiRequestBlob(
+  path: string,
+  options: RequestInit & { query?: Record<string, unknown> } = {},
+): Promise<Blob> {
+  const headers = new Headers(options.headers)
+  if (!headers.has('Accept')) headers.set('Accept', 'text/calendar')
+  if (accessToken) headers.set('Authorization', `Bearer ${accessToken}`)
+
+  const response = await fetch(makeUrl(path, options.query), {
+    ...options,
+    headers,
+    credentials: 'include',
+  })
+
+  if (!response.ok) {
+    const body = await parseResponse(response)
+    const message =
+      typeof body === 'object' && body && 'message' in body
+        ? String((body as { message: unknown }).message)
+        : `API request failed with status ${response.status}`
+    throw new ApiError(message, response.status, body)
+  }
+
+  return response.blob()
+}