Add admin UI for ArtStation re-import

Expose import as a background admin job with status polling, dry-run
and optional publish; share logic with the CLI via a service module.

client/src/lib/api.ts

@@ -229,8 +229,43 @@ export const api = {
     }),
   reindex: () =>
     request<{ ok: boolean; indexed: number }>("/api/v1/admin/reindex", { method: "POST" }),
+
+  importArtStation: (body: {
+    username?: string;
+    dryRun?: boolean;
+    publish?: boolean;
+    url?: string;
+  }) =>
+    request<{
+      ok: boolean;
+      message: string;
+      status: ArtStationImportStatus;
+    }>("/api/v1/admin/import/artstation", {
+      method: "POST",
+      body: JSON.stringify(body),
+    }),
+
+  importArtStationStatus: () =>
+    request<ArtStationImportStatus>("/api/v1/admin/import/artstation"),
 };
 
+export interface ArtStationImportStatus {
+  running: boolean;
+  startedAt?: string;
+  finishedAt?: string;
+  error?: string;
+  log: string[];
+  result?: {
+    username: string;
+    dryRun: boolean;
+    found: number;
+    imported: number;
+    skipped: number;
+    errors: number;
+    created: { title: string; slug: string }[];
+  };
+}
+
 export function mediaSrc(url?: string | null): string {
   if (!url) return "";
   if (url.startsWith("http") || url.startsWith("//")) return url;