Fixing the next three scripts

-  `Tak0-Per-Window-Switch.sh` now records the listener PID in ``~/.cache/kb_layout_per_window.listener.pid``
    - reuses it if still running, preventing multiple background listeners
    - reports missing Hyprland sockets without exiting the main script.
-  `WaybarScripts.sh` adds a `launch_files()` helper that checks `$files` before execution;
    - if unset, it shows a notification instead of running an empty command.
-  `sddm_wallpaper.sh` validates `~/.config/rofi/wallust/colors-rofi.rasi` before use
    - extracts colors via a helper, and aborts with a notification if any required colors are missing.

 On branch development
 Your branch is up to date with 'origin/development'.

 Changes to be committed:
	modified:   CHANGELOG.md
	modified:   config/hypr/scripts/Tak0-Per-Window-Switch.sh
	modified:   config/hypr/scripts/WaybarScripts.sh
	modified:   config/hypr/scripts/sddm_wallpaper.sh

4 files changed, 58 insertions, 12 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9f88343..5089b350 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,9 @@
   - `RofiSearch.sh` verifies that `jq` is available, captures the user’s query explicitly, URL-encodes it via `jq` `@uri`,
     - opens the configured search engine with the encoded query instead of dropping the term.
   - `Sounds.sh` now tries `pw-play`, then `paplay`, then `aplay`, emitting a clear error if none are installed, so the script no longer calls the non-existent pa-play.
+  - `Tak0-Per-Window-Switch.sh` now records the listener PID in `~/.cache/kb_layout_per_window.listener.pid` and reuses it if still running, preventing multiple background listeners, and reports missing Hyprland sockets without exiting the main script.
+  - `WaybarScripts.sh` adds a `launch_files()` helper that checks `$files` before execution; if unset, it shows a notification instead of running an empty command.
+  - `sddm_wallpaper.sh` validates `~/.config/rofi/wallust/colors-rofi.rasi` before use, extracts colors via a helper, and aborts with a notification if any required colors are missing.
 
 - 2026-01-06
   - Added Global Theme Changer.
diff --git a/config/hypr/scripts/Tak0-Per-Window-Switch.sh b/config/hypr/scripts/Tak0-Per-Window-Switch.sh
index 7879fb85..7cec89a6 100755
--- a/config/hypr/scripts/Tak0-Per-Window-Switch.sh
+++ b/config/hypr/scripts/Tak0-Per-Window-Switch.sh
@@ -17,6 +17,7 @@ MAP_FILE="$HOME/.cache/kb_layout_per_window"
 CFG_FILE="$HOME/.config/hypr/configs/SystemSettings.conf"
 ICON="$HOME/.config/swaync/images/ja.png"
 SCRIPT_NAME="$(basename "$0")"
+LISTENER_PIDFILE="$HOME/.cache/kb_layout_per_window.listener.pid"
 
 # Ensure map file exists
 touch "$MAP_FILE"
@@ -99,7 +100,7 @@ subscribe() {
   local SOCKET2="$XDG_RUNTIME_DIR/hypr/$HYPRLAND_INSTANCE_SIGNATURE/.socket2.sock"
   [[ -S "$SOCKET2" ]] || {
     echo "Error: Hyprland socket not found." >&2
-    exit 1
+    return 1
   }
 
   socat -u UNIX-CONNECT:"$SOCKET2" - | while read -r line; do
@@ -108,9 +109,20 @@ subscribe() {
 }
 
 # Ensure only one listener
-if ! pgrep -f "$SCRIPT_NAME.*--listener" >/dev/null; then
-  subscribe --listener &
-fi
+start_listener_once() {
+  if [[ -f "$LISTENER_PIDFILE" ]]; then
+    local existing_pid
+    existing_pid=$(cat "$LISTENER_PIDFILE" 2>/dev/null || true)
+    if [[ -n "$existing_pid" ]] && kill -0 "$existing_pid" 2>/dev/null; then
+      return
+    fi
+  fi
+
+  subscribe &
+  echo $! >"$LISTENER_PIDFILE"
+}
+
+start_listener_once
 
 # CLI
 case "$1" in
diff --git a/config/hypr/scripts/WaybarScripts.sh b/config/hypr/scripts/WaybarScripts.sh
index d2205c42..54f7a4b4 100755
--- a/config/hypr/scripts/WaybarScripts.sh
+++ b/config/hypr/scripts/WaybarScripts.sh
@@ -24,6 +24,14 @@ if [[ -z "$term" ]]; then
 fi
 
 # Execute accordingly based on the passed argument
+launch_files() {
+    if [[ -z "$files" ]]; then
+        notify-send -u low -i "$HOME/.config/swaync/images/error.png" "Waybar: files" "Set \$files in 01-UserDefaults.conf or install a default file manager."
+        return 1
+    fi
+    eval "$files &"
+}
+
 if [[ "$1" == "--btop" ]]; then
     $term --title btop sh -c 'btop'
 elif [[ "$1" == "--nvtop" ]]; then
@@ -33,7 +41,7 @@ elif [[ "$1" == "--nmtui" ]]; then
 elif [[ "$1" == "--term" ]]; then
     $term &
 elif [[ "$1" == "--files" ]]; then
-    $files &
+    launch_files
 else
     echo "Usage: $0 [--btop | --nvtop | --nmtui | --term]"
     echo "--btop       : Open btop in a new term"
diff --git a/config/hypr/scripts/sddm_wallpaper.sh b/config/hypr/scripts/sddm_wallpaper.sh
index 5ebab44c..b83f800a 100755
--- a/config/hypr/scripts/sddm_wallpaper.sh
+++ b/config/hypr/scripts/sddm_wallpaper.sh
@@ -21,6 +21,10 @@ sddm_simple="$sddm_themes_dir/simple_sddm_2"
 # rofi-wallust-sddm colors path
 rofi_wallust="$HOME/.config/rofi/wallust/colors-rofi.rasi"
 sddm_theme_conf="$sddm_simple/theme.conf"
+if [[ ! -f "$rofi_wallust" ]]; then
+    notify-send -i "$iDIR/error.png" "SDDM" "Wallust colors file not found ($rofi_wallust). Aborting."
+    exit 1
+fi
 
 # Directory for swaync
 iDIR="$HOME/.config/swaync/images"
@@ -36,13 +40,32 @@ fi
 
 # Extract colors from rofi wallust config
 
-color0=$(grep -oP 'color1:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-color1=$(grep -oP 'color0:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-color7=$(grep -oP 'color14:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-color10=$(grep -oP 'color10:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-color12=$(grep -oP 'color12:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-color13=$(grep -oP 'color13:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
-foreground=$(grep -oP 'foreground:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
+extract_color() {
+    local key="$1"
+    local value
+    value=$(grep -oP "$key:\s*\K#[A-Fa-f0-9]+" "$rofi_wallust" | head -n1)
+    echo "$value"
+}
+
+color0=$(extract_color "color1")
+color1=$(extract_color "color0")
+color7=$(extract_color "color14")
+color10=$(extract_color "color10")
+color12=$(extract_color "color12")
+color13=$(extract_color "color13")
+foreground=$(extract_color "foreground")
+
+missing_colors=()
+for var in color0 color1 color7 color10 color12 color13 foreground; do
+    if [[ -z "${!var}" ]]; then
+        missing_colors+=("$var")
+    fi
+done
+
+if [[ ${#missing_colors[@]} -gt 0 ]]; then
+    notify-send -i "$iDIR/error.png" "SDDM" "Missing color(s): ${missing_colors[*]}. Run Wallust first."
+    exit 1
+fi
 #background-color=$(grep -oP 'background:\s*\K#[A-Fa-f0-9]+' "$rofi_wallust")
 
 # wallpaper to use