feat(desktop): xdg-desktop-portal pinning, wob OSD, mako DND toggle

- xdg-desktop-portal: pin wlr for ScreenCast/Screenshot, gtk for the
  rest, so flatpak browsers (Meet, Slack, Discord) get a working
  screen-share path instead of whatever the portal frontend happens to
  pick first.
- wob: small wayland overlay bar fed via a fifo. New vol-osd.sh /
  brightness-osd.sh wrappers replace the bare pactl/brightnessctl
  invocations in keybinds so adjusting volume or backlight flashes a
  bar at the bottom of the screen. wob.service owns the fifo lifecycle
  (mkfifo before, rm after).
- mako: add a [mode=do-not-disturb] section that hides notifications
  while the mode is active, plus a Super+x n submode binding to toggle
  it. Notifications still accumulate in history; just no popups.

1 files changed, 16 insertions, 0 deletions

diff --git a/dot_config/sway/executable_brightness-osd.sh b/dot_config/sway/executable_brightness-osd.sh
new file mode 100644
index 0000000..74d6baa
--- /dev/null
+++ b/dot_config/sway/executable_brightness-osd.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+# Print brightness percent to wob's fifo to flash a brightness bar.
+# Usage: brightness-osd.sh up|down
+set -eu
+
+fifo=${XDG_RUNTIME_DIR:-/tmp}/wob.sock
+
+case "${1:-}" in
+    up)   brightnessctl set +5% >/dev/null ;;
+    down) brightnessctl set 5%- >/dev/null ;;
+    *)    echo "usage: $0 up|down" >&2; exit 2 ;;
+esac
+
+cur=$(brightnessctl g)
+max=$(brightnessctl m)
+printf '%d\n' "$(( cur * 100 / max ))" >"$fifo"