Map admins: owners invite friends to co-manage maps

Owners can invite players by name from the map workshop; invitees accept
from their dashboard and then manage the map (details, locations,
submission, refresh, contributions, appeals) through owner-delegated
checks. Adds the map_admins table, invite/admin API endpoints, dashboard
invite box, workshop admin management, and Russian translations.

components/DraftEditor.tsx

@@ -13,8 +13,10 @@ import { OwnerContributions } from "./OwnerContributions";
 import Link from "next/link";
 import { MapRefresh } from "./MapRefresh";
 import { MapAppeal } from "./MapAppeal";
+import { MapAdmins } from "./MapAdmins";
 import { ExportMap } from "./MapTransfer";
 type Draft = {
+  access: "owner" | "admin";
   imported_from_id: string | null;
   imported_owner_name: string | null;
   ownsPublishedParent: boolean;
@@ -175,6 +177,13 @@ export function DraftEditor({
         )}
       </div>
       <span className="badge">{t(statusMessage(draft.state))}</span>
+      {draft.access === "admin" && (
+        <p className="muted">
+          {t(
+            "You manage this map as an admin. The owner invited you to help run it.",
+          )}
+        </p>
+      )}
       {!draft.imported_from_id &&
         !draft.parent_dataset_id &&
         draft.map &&
@@ -440,6 +449,9 @@ export function DraftEditor({
           onChange={() => setVersion((v) => v + 1)}
         />
       )}
+      {!draft.imported_from_id && !draft.parent_dataset_id && (
+        <MapAdmins id={id} access={draft.access} />
+      )}
       {(["uploading", "processing"].includes(draft.state) ||
         (draft.parent_dataset_id &&
           ["pending", "submitted"].includes(