refactor: replace Toast with Sonner

frontend/app/features/schedules/state/helpers.ts

@@ -3,7 +3,7 @@
 import { ApiRequestError, type Schedule, type ScheduleNode, type WorkspaceBoundApi } from "../../../services/api";
 
 import { useScriptWorkspaceStore } from "../../platform/state/scriptWorkspaceStore";
-import { useUiStore } from "../../platform/state/uiStore";
+import { toast } from "sonner";
 
 import type { NodeForm, NodePositionDraft, Notice, ScheduleForm } from "./types";
 import type { SchedulesStore } from "./useSchedulesStore";
@@ -22,7 +22,9 @@ export function requireApi(): WorkspaceBoundApi {
 }
 
 export function notify(notice: Notice): void {
-  useUiStore.getState().pushToast(notice);
+  if (notice.tone === "error") toast.error(notice.message);
+  else if (notice.tone === "info") toast.info(notice.message);
+  else toast.success(notice.message);
 }
 
 export function setApiOnline(online: boolean): void {