6th commit : noctalia double folder corrected

.config/noctalia/hooks/battery-threshold.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Use the threshold from the hook command, or fall back to 20%.
+threshold="${NOCTALIA_BATTERY_THRESHOLD:-20}"
+
+# Keep a tiny state file so the script can compare this event with the last one.
+state_dir="${XDG_STATE_HOME:-$HOME/.local/state}/noctalia"
+state_file="$state_dir/battery-percent"
+
+# Noctalia provides these values whenever battery_percentage_changed fires.
+percent="${NOCTALIA_BATTERY_PERCENT:-}"
+battery_state="${NOCTALIA_BATTERY_STATE:-unknown}"
+
+# Ignore the event if the percentage is missing or not a whole number.
+[[ "$percent" =~ ^[0-9]+$ ]] || exit 0
+
+mkdir -p "$state_dir"
+
+# Read the previous percentage, then save the current percentage for next time.
+previous=""
+[[ -r "$state_file" ]] && previous="$(<"$state_file")"
+printf '%s\n' "$percent" > "$state_file"
+
+# Only warn while discharging, and only after we have a previous value to compare.
+[[ "$battery_state" == "discharging" ]] || exit 0
+[[ "$previous" =~ ^[0-9]+$ ]] || exit 0
+
+# Fire once when crossing below the threshold, not every time the battery changes below it.
+if (( previous >= threshold && percent < threshold )); then
+  notify-send -u critical "Battery low" "Battery is ${percent}%."
+  # Or run any other command, for example:
+  # systemctl --user start low-battery.target
+fi