polish(sidebar): default widget order — Saved views, Upload date, Your tags, Language, Topic

Moves the Tags widget up (after Upload date) in the default sidebar layout.
Only affects fresh layouts; existing users keep their persisted arrangement.

frontend/src/lib/sidebarLayout.ts

@@ -8,7 +8,7 @@ import { LS, readJSON, writeJSON } from "./storage";
 
 export type WidgetId = "savedviews" | "date" | "language" | "topic" | "tags";
 
-export const ALL_WIDGETS: WidgetId[] = ["savedviews", "date", "language", "topic", "tags"];
+export const ALL_WIDGETS: WidgetId[] = ["savedviews", "date", "tags", "language", "topic"];
 
 export const WIDGET_TITLES: Record<WidgetId, string> = {
   savedviews: "Saved views",