Set the '-R' option for less not in $PAGER, but as $LESS.

lib/misc.zsh

@@ -9,5 +9,7 @@ bindkey "^[m" copy-prev-shell-word
 setopt long_list_jobs
 
 ## pager
-export PAGER="less -R"
+export PAGER="less"
+export LESS="-R"
+
 export LC_CTYPE=$LANG