Fix admin permissions bounce, prefixes APIs, and Italian UI leftovers.

Gate permissions on ACL manage + resolve super-admin from live user ranks, restore prefixes API routes, and anglicize hardcoded admin copy with nav i18n.

Co-authored-by: Cursor <[email protected]>

src/app/admin/import/furni/nitro-editor-dialog.tsx

@@ -408,7 +408,7 @@ export function NitroEditorDialog({
 												htmlFor="dim-y"
 												className="text-xs text-muted-foreground"
 											>
-												Y (profondità)
+												Y (depth)
 											</Label>
 											<Input
 												id="dim-y"
@@ -817,7 +817,7 @@ export function NitroEditorDialog({
 							onClick={() => onOpenChange(false)}
 							disabled={saving}
 						>
-							Annulla
+							Cancel
 						</Button>
 						<Button
 							onClick={handleSave}
@@ -829,7 +829,7 @@ export function NitroEditorDialog({
 							) : (
 								<Save className="w-4 h-4" />
 							)}
-							Salva
+							Save
 						</Button>
 					</div>
 				</DialogFooter>