fix prompt

1. Completion lost prompt
2. Original input is lost when canceling

zsh-fzf-history-search.zsh

@@ -4,10 +4,15 @@
 fzf_history_search() {
   setopt extendedglob
   candidates=(${(f)"$(fc -li -1 0 | fzf +s +m -x -e -q "$BUFFER")"})
-  BUFFER="${candidates[@]/(#m)*/${${(As: :)MATCH}[4,-1]}}"
-  BUFFER="${BUFFER[@]/(#b)(?)\\n/$match[1]
+  local ret=$?
+  if [ -n "$candidates" ]; then
+    BUFFER="${candidates[@]/(#m)*/${${(As: :)MATCH}[4,-1]}}"
+    BUFFER="${BUFFER[@]/(#b)(?)\\n/$match[1]
 }"
-  zle end-of-buffer-or-history
+    zle vi-fetch-history -n $BUFFER
+  fi
+  zle reset-prompt
+  return $ret
 }
 
 autoload fzf_history_search