feat(hyprland): add airplane-mode waybar toggle

I added a laptop-only waybar button that drops the machine into a low-power state and restores it on a second click. Engaging turns wifi off, sets the CPU energy-performance preference to power, dims the backlight to 35%, and stops network-only services (tailscale, proton-vpn, avahi, cups, wsdd, geoclue, sshd, fail2ban, syncthing). Bluetooth is left alone so earbuds keep working.

Disengaging replays the state recorded when airplane mode was engaged rather than writing hardcoded defaults. A lever already in its low-power position is left untouched: wifi that was already off stays off, and a service that was already stopped isn't restarted.

The indicator hides itself on machines with no battery, so desktops never show the button. State lives in $XDG_RUNTIME_DIR/airplane-state, and the bar refreshes the moment the toggle fires via a realtime signal.

2 files changed, 14 insertions, 0 deletions

diff --git a/dotfiles/hyprland/.config/waybar/config b/dotfiles/hyprland/.config/waybar/config
index 2ae43fe..97fb3b7 100644
--- a/dotfiles/hyprland/.config/waybar/config
+++ b/dotfiles/hyprland/.config/waybar/config
@@ -18,6 +18,7 @@
         "custom/netspeed",
         "pulseaudio",
         "custom/touchpad",
+        "custom/airplane",
         "idle_inhibitor",
         "custom/pocketbook",
         "tray",
@@ -149,6 +150,13 @@
         "on-click": "toggle-touchpad"
     },
 
+    "custom/airplane": {
+        "exec": "waybar-airplane",
+        "return-type": "json",
+        "signal": 10,
+        "on-click": "airplane-mode"
+    },
+
     "idle_inhibitor": {
         "format": "<span size='large'>{icon}</span>",
         "format-icons": {
diff --git a/dotfiles/hyprland/.config/waybar/style.css b/dotfiles/hyprland/.config/waybar/style.css
index 3a849c5..cd158d0 100644
--- a/dotfiles/hyprland/.config/waybar/style.css
+++ b/dotfiles/hyprland/.config/waybar/style.css
@@ -77,6 +77,7 @@ window#waybar {
 #custom-worldclock,
 #custom-layout,
 #custom-touchpad,
+#custom-airplane,
 #window {
     padding: 0.45rem;
     margin: 0.3rem;
@@ -98,6 +99,7 @@ window#waybar {
 #pulseaudio:hover,
 #sysmonitor:hover,
 #custom-touchpad:hover,
+#custom-airplane:hover,
 #custom-layout:hover {
     background-color: #474544;
     border-radius: 1rem;
@@ -112,6 +114,10 @@ window#waybar {
     color: #d47c59;
 }
 
+#custom-airplane.active {
+    color: #d7af5f;
+}
+
 #temperature.warning {
     color: #d7af5f;
 }