feat(waybar): island floating 3-pills + popups + deploy

- Config waybar 3-pills glassmorphism (left/center/right)
- Scripts : gpu, network, power-profile (toggle+luminosité/profil),
  cava daemon+reader, wob (volume/luminosité), rofi-launcher
- Popup media GTK3 : volume sortie+entrée + luminosité (vc-media-popup.py)
- Profil énergie : cycle balanced→low-power→performance avec brightnessctl
- Autostart COSMIC : waybar.desktop + wob.desktop
- Thème COSMIC Light ajouté (accent violet-chaton)
- deploy : +autostart, +sudoers platform_profile, +udev platform_profile,
  +scripts .py waybar, +CosmicTheme.Light

INSTALL/configs/waybar/scripts/cava-read.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# cava-read.sh — lit /tmp/waybar_cava → JSON waybar (interval: 1)
+# Lance automatiquement le démon cava-waybar.sh si absent.
+
+OUT="/tmp/waybar_cava"
+PID="/tmp/waybar_cava.pid"
+DAEMON="$HOME/.config/waybar/scripts/cava-waybar.sh"
+
+# Démarrer le démon si pas actif
+if [[ ! -f "$PID" ]] || ! kill -0 "$(cat "$PID" 2>/dev/null)" 2>/dev/null; then
+    nohup bash "$DAEMON" >/dev/null 2>&1 &
+fi
+
+# Lire et retourner le JSON
+if [[ -f "$OUT" ]]; then
+    BAR=$(tail -1 "$OUT" 2>/dev/null)
+    [[ -n "$BAR" ]] && printf '{"text":"%s","tooltip":"","class":""}\n' "$BAR" && exit 0
+fi
+
+printf '{"text":"▁▁▁▁▁▁▁▁","tooltip":"","class":"muted"}\n'