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, 23 insertions, 0 deletions

diff --git a/dot_config/sway/executable_vol-osd.sh b/dot_config/sway/executable_vol-osd.sh
new file mode 100644
index 0000000..46f35b7
--- /dev/null
+++ b/dot_config/sway/executable_vol-osd.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Print 0–100 to wob's fifo to flash a volume bar overlay.
+# Usage: vol-osd.sh up|down|mute (mute toggles)
+set -eu
+
+fifo=${XDG_RUNTIME_DIR:-/tmp}/wob.sock
+sink='@DEFAULT_SINK@'
+
+case "${1:-}" in
+    up)   pactl set-sink-volume "$sink" +5% ;;
+    down) pactl set-sink-volume "$sink" -5% ;;
+    mute) pactl set-sink-mute   "$sink" toggle ;;
+    *)    echo "usage: $0 up|down|mute" >&2; exit 2 ;;
+esac
+
+muted=$(pactl get-sink-mute "$sink" | awk '{print $2}')
+if [ "$muted" = "yes" ]; then
+    printf '0\n' >"$fifo"
+else
+    pactl get-sink-volume "$sink" |
+        awk '/Volume:/ { for (i=1;i<=NF;i++) if ($i ~ /%/) { gsub(/%/,"",$i); print $i; exit } }' \
+        >"$fifo"
+fi