fix: allow using --select-nth with --continue (#1366)

Co-authored-by: port19 <port19@port19.xyz>
Co-authored-by: Mori Zen <71zenith@proton.me>

ani-cli

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-version_number="4.8.9"
+version_number="4.8.10"
 
 # UI
 
@@ -427,7 +427,8 @@ case "$search" in
         anime_list=$(while read -r ep_no id title; do process_hist_entry & done <"$histfile")
         wait
         [ -z "$anime_list" ] && die "No unwatched series in history!"
-        id=$(printf "%s" "$anime_list" | nl -w 2 | sed 's/^[[:space:]]//' | nth "Select anime: " | cut -f1)
+        [ -z "${index##*[!0-9]*}" ] && id=$(printf "%s" "$anime_list" | nl -w 2 | sed 's/^[[:space:]]//' | nth "Select anime: " | cut -f1)
+        [ -z "${index##*[!0-9]*}" ] || id=$(printf "%s" "$anime_list" | sed -n "${index}p" | cut -f1)
         [ -z "$id" ] && exit 1
         title=$(printf "%s" "$anime_list" | grep "$id" | cut -f2 | sed 's/ - episode.*//')
         ep_list=$(episodes_list "$id")