chore: small improvements

refactor: use var in nc-backup command
chore: highlight zsh as zsh again

.config/nvim/ftdetect/extensions.vim

@@ -1,6 +1,6 @@
 au BufRead,BufNewFile *.arb		    set filetype=json
 au BufRead,BufNewFile Brewfile    set filetype=ruby
-au BufRead,BufNewFile *.zsh       set filetype=bash
+" au BufRead,BufNewFile *.zsh       set filetype=bash
 au BufRead,BufNewFile Makefile    set filetype=make noexpandtab shiftwidth=4 softtabstop=0
 au BufRead,BufNewFile *.md        set filetype=markdown
 au BufRead,BufNewFile *.mdx       set filetype=markdown

plugins/common/nextcloud.zsh

@@ -20,15 +20,18 @@ nc-dev-pretty-logs() {
 }
 
 nc-backup() {
-  if [ ! -d "/Volumes/2T SSD/Nextcloud/" ]; then
+  drive="/Volumes/2T SSD"
+  if [ ! -d "$drive/Nextcloud/" ]; then
     echo "Mount the 2T SSD first!"
     exit 1
   fi
 
   rsync -avhz --delete --delete-excluded --partial --progress -e ssh \
     --exclude 'appdata_*/' \
+    --exclude '._*' \
     spider.casraf.dev:/mnt/ncdata/ \
-    "/Volumes/2T SSD/Nextcloud/"
+    "$drive/Nextcloud/"
+  find "$drive" -type f -name '._*' -exec rm -f -- {} +
 }
 
 nc-aio-force-update() {