Add volume control to status bar, and update it to support forced

updates (idea is to send updates after manually making changes to
        volume/brightness for a more responsive ui etc)

sway/status.sh

@@ -6,8 +6,15 @@ brightness_icon=""
 bluetooth_icon=""
 keyboard_icon="⌨"
 date_icon=""
+volume_icon=""
+muted_icon=""
 
-while true; do
+# --- Added for Signal Handling ---
+# File to store the PID of this script
+status_pid_file="/tmp/swaybar_status_pid"
+
+# Function to update the status and print it
+update_status() {
 	# VPN (Mullvad)
 	vpn_status=$(mullvad status)
 	is_connected=$(echo "$vpn_status" | grep -c "Connected")
@@ -51,26 +58,55 @@ while true; do
 	if [ "$language_index" -eq 0 ]; then
 		keyboard_layout="US"
 	else
-        keyboard_layout="SE"
+		keyboard_layout="SE" # Assuming SE is index 1
 	fi
 	keyboard_display="$keyboard_icon $keyboard_layout"
 
-    # Combine all statuses, separated by tabs (\t).
-    # - In zsh, you can do literal tabs with $'\t' 
+    volume_output=$(wpctl get-volume @DEFAULT_AUDIO_SINK@)
+    is_muted=$(echo "$volume_output" | grep -c "MUTED")
+    if [ "$is_muted" -eq 1 ]; then
+        volume_display="$muted_icon Muted"
+    else
+        # Extract decimal volume (e.g., 0.75) and convert to percentage
+        volume_decimal=$(echo "$volume_output" | awk '{print $2}')
+        # Use awk to multiply by 100 and format as an integer percentage
+        volume_percent=$(awk -v vol="$volume_decimal" 'BEGIN {printf "%.0f", vol * 100}')
+        volume_display="$volume_icon   $volume_percent%"
+    fi
+
+	# Combine all statuses
 	final_status=""
 	if [ -n "$bluetooth_display" ]; then
 		final_status="$bluetooth_display"
 	fi
 
-    space="    "
+	space="   " # Using standard spaces for separation
+	final_status="$final_status$space$volume_display"
 	final_status="$final_status$space$brightness_display"
 	final_status="$final_status$space$battery"
 	final_status="$final_status$space$keyboard_display"
 	final_status="$final_status$space$vpn_display"
 	final_status="$final_status$space$network_display"
 	final_status="$final_status$space$date_time_icon"
-    final_status="$final_status "
+	final_status="$final_status " # Trailing space
 
+	# Print the status followed by a newline
 	echo "$final_status"
+}
+
+# --- Added for Signal Handling ---
+# Write the script's PID to the file so we can signal it
+echo $$ > "$status_pid_file"
+
+# Trap a real-time signal (e.g., SIGRTMIN+8) to trigger an immediate update
+# When this signal is received, the 'update_status' function is executed
+trap 'update_status' 42
+
+# Main loop
+while true; do
+	update_status # Perform the regular update
 	sleep 1
 done
+
+# Clean up the PID file on exit (optional but good practice)
+trap 'rm "$status_pid_file"' EXIT