submissions(#23): coerce getEditors() (Set) before mapping in the submissions pane

With FEATURE_SUBMISSIONS on, refreshAdminPaneState fires populateSubmissions,
which mapped accessControl.getEditors() directly — but that returns a Set, so
`.map` threw ("map is not a function") as a leaked async rejection after the
profile-modal test ended. Coerce with Array.from() (handles Set or array).
profile-modal-controller tests 26/26.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

js/ui/profileModal/submissionsSection.js

@@ -36,7 +36,8 @@ export async function populateSubmissions(controller) {
   }
 
   const adminHex = safeDecodeNpub(controller.mainController.adminSuperNpub);
-  const editorHexes = (accessControl.getEditors?.() || [])
+  // getEditors() may return a Set (or array) — coerce before mapping.
+  const editorHexes = Array.from(accessControl.getEditors?.() || [])
     .map((npub) => safeDecodeNpub(npub))
     .filter(Boolean);