refactor(catalog): unify commands and embed guarded catalog workspace

src/components/admin/catalog-manager/use-catalog-store.tsx

@@ -59,6 +59,7 @@ const initialState: CatalogManagerState = {
 // ── Actions ───────────────────────────────────────────────────
 
 export type CatalogAction =
+	| { type: "RESTORE_SELECTION"; rootId: number | null; pageId: number | null }
 	| { type: "SET_ROOT_PAGES"; pages: RootTab[] }
 	| { type: "SET_LOADING_ROOT"; loading: boolean }
 	| { type: "SET_ACTIVE_TAB"; id: number | null }
@@ -93,14 +94,33 @@ function reducer(
 	action: CatalogAction,
 ): CatalogManagerState {
 	switch (action.type) {
+		case "RESTORE_SELECTION":
+			return {
+				...state,
+				activeTabId:
+					action.rootId ?? state.rootPages[0]?.id ?? state.activeTabId,
+				selectedPageId: action.pageId,
+				focusedId: action.pageId,
+				editorDirty: false,
+				multiSelectedIds: new Set(),
+				ancestors: [],
+			};
 		case "SET_ROOT_PAGES":
-			return { ...state, rootPages: action.pages, loadingRoot: false };
+			return {
+				...state,
+				rootPages: action.pages,
+				loadingRoot: false,
+				activeTabId: action.pages.some((page) => page.id === state.activeTabId)
+					? state.activeTabId
+					: (action.pages[0]?.id ?? null),
+			};
 		case "SET_LOADING_ROOT":
 			return { ...state, loadingRoot: action.loading };
 		case "SET_ACTIVE_TAB":
 			return {
 				...state,
 				activeTabId: action.id,
+				editorDirty: false,
 				selectedPageId: null,
 				multiSelectedIds: new Set(),
 				focusedId: null,
@@ -110,6 +130,7 @@ function reducer(
 			return {
 				...state,
 				selectedPageId: action.id,
+				editorDirty: false,
 				multiSelectedIds: new Set(),
 				focusedId: action.id,
 			};