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

patch/apply.sh

@@ -22,7 +22,7 @@ PATCH_DIR="/data/truecloud-patch"
 LOG="$PATCH_DIR/apply.log"
 
 # Rotate log at 512 KB to avoid unbounded growth on a system volume.
-# Keep one prior generation (.1) so the last two boots are always available.
+# Keep two prior generations (.1 and .2) so the last three boots are always available.
 if [ -f "$LOG" ] && [ "$(wc -c < "$LOG")" -gt 524288 ]; then
     [ -f "${LOG}.1" ] && mv "${LOG}.1" "${LOG}.2"
     mv "$LOG" "${LOG}.1"

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)