kitty:daemon: Use TMPDIR and support multi-user

.config/kitty/daemon.sh

@@ -13,9 +13,12 @@
 #
 # NOTE: `--start-as hidden` needs kitty 0.42.0 or later.
 
+TMP_DIR="${TMPDIR:-/tmp}/kitty.$USER"
+mkdir -p "$TMP_DIR"
+
 kitty \
 	--single-instance \
 	--start-as hidden \
 	--detach \
 	-o allow_remote_control=socket-only \
-	--listen-on unix:/tmp/mykitty
+	--listen-on unix:"$TMP_DIR/kitty.sock"

.config/kitty/get_cwd.sh

@@ -5,9 +5,11 @@
 # Print the current working directory of the focused kitty window. Returns 4 if
 # none exist or is focused.
 
+socket_path="${TMPDIR:-/tmp}/kitty.$USER/kitty.sock"
+
 # NOTE: the backticks are used for hacky line-continuation, taken from
 #       https://stackoverflow.com/a/7729087/2092762c9
-kitten @ --to unix:/tmp/mykitty ls \
+kitten @ --to unix:"$socket_path" ls \
 	| jq -er ".[]`
 		` | select(.is_focused).tabs.[]`
 		` | select(.is_focused).windows.[]`