refactor: unify data preparations and research input snapshots

frontend/src/components/AppSidebar.tsx

@@ -18,6 +18,13 @@ import type { WorkspacePage } from "../ai/workspace";
 const navigation = [
   { id: "home", label: "首页看板", icon: IconGridView, group: "概览" },
   { id: "datasets", label: "数据目录", icon: IconList, group: "数据与素材" },
+  { id: "fields", label: "字段目录", icon: IconList, group: "数据与素材" },
+  {
+    id: "preparations",
+    label: "数据准备",
+    icon: IconList,
+    group: "数据与素材",
+  },
   { id: "operators", label: "算子库", icon: IconList, group: "数据与素材" },
   {
     id: "templates",

frontend/src/components/JobPanel.tsx

@@ -93,6 +93,14 @@ export function JobPanel({
               {job.checkpoint.dates_completed} / {job.checkpoint.dates_total} 天
             </p>
           )}
+          {job.kind === "catalog_full_sync" && (
+            <p>
+              数据集 {String(job.checkpoint?.dataset_id ?? "目录")} · 已完成{" "}
+              {String(job.checkpoint?.datasets_completed ?? 0)} /{" "}
+              {String(job.checkpoint?.datasets_total ?? "待统计")}
+              {!!job.error && <span> · {job.error}</span>}
+            </p>
+          )}
           {job.kind === "pnl_backfill" && (
             <p className="muted">
               {job.total === 0