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/themes/cosmic/com.system76.CosmicTheme.Light/v1/secondary

@@ -0,0 +1,100 @@
+(
+    base: (
+        red: 0.30756307,
+        green: 0.21295837,
+        blue: 0.4027321,
+        alpha: 1.0,
+    ),
+    component: (
+        base: (
+            red: 0.3401073,
+            green: 0.24494115,
+            blue: 0.4376148,
+            alpha: 1.0,
+        ),
+        hover: (
+            red: 0.30609655,
+            green: 0.22044702,
+            blue: 0.3938533,
+            alpha: 1.0,
+        ),
+        pressed: (
+            red: 0.27208585,
+            green: 0.19595292,
+            blue: 0.35009184,
+            alpha: 1.0,
+        ),
+        selected: (
+            red: 0.30609655,
+            green: 0.22044702,
+            blue: 0.3938533,
+            alpha: 1.0,
+        ),
+        selected_text: (
+            red: 0.9058823,
+            green: 0.6117647,
+            blue: 0.99607843,
+            alpha: 1.0,
+        ),
+        focus: (
+            red: 0.9058823,
+            green: 0.6117647,
+            blue: 0.99607843,
+            alpha: 1.0,
+        ),
+        divider: (
+            red: 0.8966642,
+            green: 0.8966583,
+            blue: 0.87355375,
+            alpha: 0.2,
+        ),
+        on: (
+            red: 0.8966642,
+            green: 0.8966583,
+            blue: 0.87355375,
+            alpha: 1.0,
+        ),
+        disabled: (
+            red: 0.3401073,
+            green: 0.24494115,
+            blue: 0.4376148,
+            alpha: 0.5,
+        ),
+        on_disabled: (
+            red: 0.8966642,
+            green: 0.8966583,
+            blue: 0.87355375,
+            alpha: 0.65,
+        ),
+        border: (
+            red: 0.072988935,
+            green: 0.079405405,
+            blue: 0.14595589,
+            alpha: 1.0,
+        ),
+        disabled_border: (
+            red: 0.072988935,
+            green: 0.079405405,
+            blue: 0.14595589,
+            alpha: 0.5,
+        ),
+    ),
+    divider: (
+        red: 0.41758668,
+        green: 0.34190118,
+        blue: 0.48913747,
+        alpha: 1.0,
+    ),
+    on: (
+        red: 0.8576811,
+        green: 0.8576725,
+        blue: 0.83475876,
+        alpha: 1.0,
+    ),
+    small_widget: (
+        red: 0.31199428,
+        green: 0.31415156,
+        blue: 0.33818555,
+        alpha: 0.25,
+    ),
+)