Fix two findings from full codebase audit

- apply.sh: correct comment from 'one prior generation' to 'two prior
  generations (.1 and .2)' — rotation has always kept three log files
- uninstall.sh: add sync comment on find paths to match WEBUI_CANDIDATES
  in patch/patch_ui.py, preventing silent drift if a new path is added

uninstall.sh

@@ -107,6 +107,7 @@ while IFS= read -r backup; do
     mv "$backup" "$original"
     echo "  Restored: $original"
     RESTORED=1
+# Keep these paths in sync with WEBUI_CANDIDATES in patch/patch_ui.py
 done < <(find /usr/share/truenas /usr/share/truenas-ui /var/www/truenas \
               -name "*.js.pre-truecloud-patch" 2>/dev/null)