feat(studio): localize catalog studio UI and polish responsive layout

Route all Catalog Studio strings through the admin.studio namespace
(workspace, filters, review, inspector, quality, sync, scale32, organize
imports and page titles/subtitles) with English fallback, and add shared
StudioPage chrome plus a loading skeleton. Tighten mobile padding on the
header and sub-bars.

src/components/admin/studio/organize-imports-dialog.tsx

@@ -851,10 +851,10 @@ export function OrganizeImportsDialog({
 												</SelectTrigger>
 												<SelectContent>
 													<SelectItem value="0" className="text-xs">
-														Duckets
+														{t("pointsTypeDuckets")}
 													</SelectItem>
 													<SelectItem value="5" className="text-xs">
-														Diamonds
+														{t("pointsTypeDiamonds")}
 													</SelectItem>
 												</SelectContent>
 											</Select>
@@ -1571,7 +1571,7 @@ export function OrganizeImportsDialog({
 									</span>
 								</div>
 								<Badge variant="outline" className="text-[10px]">
-									{previewGroup.items.length} items
+									{previewGroup.items.length} {t("itemsUnit")}
 								</Badge>
 							</div>
 							{previewGroup.layout &&