docs: agy.md — architecture, routes, bugfix, and pending plan

- Fix poller shape mismatch (res.data -> res.data?.data) that caused
  silent TypeError and 0 posts despite completed galleries (#1)
- Align types in api.ts to reflect ApiResponse<PaginatedResponse<>> shape
- Comprehensive agy.md documenting architecture, routes, 43 CBZ galleries,
  known bugs, blocker (API listing), and implementation plan

src/lib/api.ts

@@ -55,7 +55,7 @@ export const api = {
     list: (status?: string, page = 1, perPage = 20) => {
       const params = new URLSearchParams({ page: String(page), per_page: String(perPage) })
       if (status) params.set("status", status)
-      return fetchApi<PaginatedResponse<GalleryItem>>(`/galleries?${params}`)
+      return fetchApi<ApiResponse<PaginatedResponse<GalleryItem>>>(`/galleries?${params}`)
     },
 
     get: (gid: string) =>
@@ -126,7 +126,7 @@ export const api = {
     list: (status?: string, page = 1, perPage = 20) => {
       const params = new URLSearchParams({ page: String(page), per_page: String(perPage) })
       if (status) params.set("status", status)
-      return fetchApi<PaginatedResponse<QueueItem>>(`/queue?${params}`)
+      return fetchApi<ApiResponse<PaginatedResponse<QueueItem>>>(`/queue?${params}`)
     },
 
     stats: () =>

src/lib/poller.ts

@@ -25,7 +25,7 @@ export async function pollOnce(): Promise<{ newPosts: number }> {
 
   try {
     const res = await api.galleries.list("completed", 1, 100)
-    const galleries = res.data || []
+    const galleries = res.data?.data || res.data || []
 
     for (const g of galleries) {
       try {