Use consistent bash5 style for conditionals and quoting

bin/omarchy-cmd-audio-switch

@@ -7,7 +7,7 @@ focused_monitor="$(hyprctl monitors -j | jq -r '.[] | select(.focused == true).n
 sinks=$(pactl -f json list sinks | jq '[.[] | select((.ports | length == 0) or ([.ports[]? | .availability != "not available"] | any))]')
 sinks_count=$(echo "$sinks" | jq '. | length')
 
-if [ "$sinks_count" -eq 0 ]; then
+if (( sinks_count == 0 )); then
   swayosd-client \
     --monitor "$focused_monitor" \
     --custom-message "No audio devices found"
@@ -17,7 +17,7 @@ fi
 current_sink_name=$(pactl get-default-sink)
 current_sink_index=$(echo "$sinks" | jq -r --arg name "$current_sink_name" 'map(.name) | index($name)')
 
-if [ "$current_sink_index" != "null" ]; then
+if [[ $current_sink_index != "null" ]]; then
   next_sink_index=$(((current_sink_index + 1) % sinks_count))
 else
   next_sink_index=0
@@ -44,11 +44,11 @@ next_sink_volume=$(echo "$next_sink" | jq -r \
   '.volume | to_entries[0].value.value_percent | sub("%"; "")')
 next_sink_is_muted=$(echo "$next_sink" | jq -r '.mute')
 
-if [ "$next_sink_is_muted" = "true" ] || [ "$next_sink_volume" -eq 0 ]; then
+if [[ $next_sink_is_muted = "true" ]] || (( next_sink_volume == 0 )); then
   icon_state="muted"
-elif [ "$next_sink_volume" -le 33 ]; then
+elif (( next_sink_volume <= 33 )); then
   icon_state="low"
-elif [ "$next_sink_volume" -le 66 ]; then
+elif (( next_sink_volume <= 66 )); then
   icon_state="medium"
 else
   icon_state="high"
@@ -56,7 +56,7 @@ fi
 
 next_sink_volume_icon="sink-volume-${icon_state}-symbolic"
 
-if [ "$next_sink_name" != "$current_sink_name" ]; then
+if [[ $next_sink_name != $current_sink_name ]]; then
   pactl set-default-sink "$next_sink_name"
 fi