refactor: address /code-review on R11 feedback symmetry

- admin._decide: add an idempotency guard (409 unless status was 'pending') so a
  repeat/stale approve OR deny can't re-run its side effects — now that deny emails,
  this stops duplicate denial mails and a rejection mail to an already-approved user.
- SavedViewsWidget: extract runViewMutation(fn, failMsg) (returns success) — dedups
  the five try/catch+refresh blocks AND lets create/rename close their input only on
  success, so a failed create keeps the user's typed name.
- worker._notify_download_done: take user_id/title captured BEFORE the caller's commit
  (no post-commit refresh SELECT); add a  so the inbox labels an edit job
  'Edit ready' instead of 'Download ready' (new inbox.editDone i18n, HU+EN).

Gate green (ruff/tsc/eslint-0/prettier/knip/vitest 79/pytest 193); smoke-tested the
saved-views + notifications surfaces render clean on a fresh dev server.

frontend/src/components/NotificationsPanel.tsx

@@ -259,9 +259,10 @@ function NotificationRow({
     });
     body = d.summary || n.body;
   } else if (isDownloadDone) {
-    // "Download ready", with the video's title as the body (the producer ships it in data.title).
-    const d = n.data as { title?: string | null };
-    title = t("inbox.downloadDone.title");
+    // "Download ready" / "Edit ready" per the producer's kind, with the video's title as the body
+    // (shipped in data.title). Same notification type; the copy differs so an edit isn't mislabelled.
+    const d = n.data as { title?: string | null; kind?: string };
+    title = t(d.kind === "edit" ? "inbox.editDone.title" : "inbox.downloadDone.title");
     body = d.title || n.body;
   }
   return (

frontend/src/components/SavedViewsWidget.tsx

@@ -72,6 +72,22 @@ export default function SavedViewsWidget({
   }, [viewsQuery.data]);
 
   const refresh = () => qc.invalidateQueries({ queryKey: qk.savedViews() });
+
+  // Run a saved-view mutation with uniform feedback: on failure surface the server's reason instead
+  // of a silent swallow, and always refetch afterwards (which also reverts an optimistic change to
+  // the server's truth). Returns whether it succeeded, so callers can gate success-only side effects
+  // (e.g. closing an editor) and keep the input open — with the user's text — on failure.
+  async function runViewMutation(fn: () => Promise<unknown>, failMsg: string): Promise<boolean> {
+    try {
+      await fn();
+      return true;
+    } catch (e) {
+      notifyActionError(e, failMsg);
+      return false;
+    } finally {
+      refresh();
+    }
+  }
   const currentKey = keyOf(filters);
 
   async function save() {
@@ -79,35 +95,30 @@ export default function SavedViewsWidget({
     if (!name) return;
     // Strip the transient shuffle seed so a saved "shuffle" view re-rolls fresh on apply.
     const { seed: _seed, ...clean } = filters;
-    setNaming(false);
-    setDraftName("");
-    try {
-      await api.createView(name, clean);
-    } catch (e) {
-      notifyActionError(e, t("views.actionFailed"));
+    // Close the naming input only on success, so a failed create keeps the user's typed name.
+    if (await runViewMutation(() => api.createView(name, clean), t("views.actionFailed"))) {
+      setNaming(false);
+      setDraftName("");
     }
-    refresh();
   }
 
   async function rename(id: number, name: string) {
     const next = name.trim();
-    setRenameId(null);
-    if (!next) return;
-    try {
-      await api.updateView(id, { name: next });
-    } catch (e) {
-      notifyActionError(e, t("views.actionFailed"));
+    if (!next) {
+      setRenameId(null);
+      return;
+    }
+    // Close the rename editor only on success, so a failed rename stays open for a retry.
+    if (await runViewMutation(() => api.updateView(id, { name: next }), t("views.actionFailed"))) {
+      setRenameId(null);
     }
-    refresh();
   }
 
   async function toggleDefault(v: SavedView) {
-    try {
-      await api.updateView(v.id, { is_default: !v.is_default });
-    } catch (e) {
-      notifyActionError(e, t("views.actionFailed"));
-    }
-    refresh();
+    await runViewMutation(
+      () => api.updateView(v.id, { is_default: !v.is_default }),
+      t("views.actionFailed"),
+    );
   }
 
   async function remove(v: SavedView) {
@@ -117,12 +128,7 @@ export default function SavedViewsWidget({
       danger: true,
     });
     if (!ok) return;
-    try {
-      await api.deleteView(v.id);
-    } catch (e) {
-      notifyActionError(e, t("views.actionFailed"));
-    }
-    refresh();
+    await runViewMutation(() => api.deleteView(v.id), t("views.actionFailed"));
   }
 
   async function share(v: SavedView) {
@@ -146,14 +152,9 @@ export default function SavedViewsWidget({
       qk.savedViews(),
       next.map((id) => views.find((v) => v.id === id)!),
     );
-    // On failure the refetch below reverts the optimistic order to the server's truth; without the
-    // toast the drop would silently snap back with no explanation.
-    try {
-      await api.reorderViews(next);
-    } catch (e) {
-      notifyActionError(e, t("views.reorderFailed"));
-    }
-    refresh();
+    // On failure runViewMutation's refetch reverts the optimistic order to the server's truth;
+    // without the toast the drop would silently snap back with no explanation.
+    await runViewMutation(() => api.reorderViews(next), t("views.reorderFailed"));
   }
 
   return (

frontend/src/i18n/locales/en/inbox.json

@@ -17,6 +17,9 @@
   "downloadDone": {
     "title": "Download ready"
   },
+  "editDone": {
+    "title": "Edit ready"
+  },
   "maintenance": {
     "title": "Videos removed",
     "body_one": "{{count}} saved or playlisted video was removed because it's no longer available on YouTube.",

frontend/src/i18n/locales/hu/inbox.json

@@ -17,6 +17,9 @@
   "downloadDone": {
     "title": "Letöltés kész"
   },
+  "editDone": {
+    "title": "Vágás kész"
+  },
   "maintenance": {
     "title": "Videók eltávolítva",
     "body_one": "{{count}} mentett vagy lejátszási listás videó eltávolítva, mert már nem elérhető a YouTube-on.",