feat(userbot,api,frontend): backfill stories and unbreak all-stories list

frontend/src/lib/api/endpoints.ts

@@ -315,7 +315,7 @@ export function getMessageAt(chatId: number, date: string): Promise<MessageAt> {
 }
 
 export function getStories(
-  peerId: number,
+  peerId: number | null,
   page: Page = {}
 ): Promise<StoryView[]> {
   return request<StoryView[]>("/stories", {
@@ -367,6 +367,15 @@ export function enqueueBackfill(
   });
 }
 
+export function enqueueStoriesBackfill(
+  peerId: number
+): Promise<{ job_id: number }> {
+  return request<{ job_id: number }>("/stories/backfill", {
+    method: "POST",
+    body: { account_id: accounts.selectedId, peer_id: peerId },
+  });
+}
+
 export function discoverPeers(
   query: string,
   remote = false