control centre, notification overhaul, and cleanup

One centred rofi panel (super+x, or the gear in the bar) now drives network,
bluetooth, audio, WireGuard, display, notifications, clipboard, emoji,
screenshots, wallpaper, the particle layer, the bar and power. The separate
per-function menus are gone.

dunst: icons and images were disabled outright (icon_position=off,
max_icon_size=0). Now icons resolve through Papirus, images render, progress
bars are styled, notifications gap and stack, and fullscreen windows are not
covered unless the message is critical. Volume up/down never notified at all;
they now show a stacking OSD with a progress bar.

Removed things that were broken or belonged to whoever this rice came from:
- vpn-launcher.sh (mullvad/openvpn) and dc-multivpn
- audio/bluetooth/network/power rofi menus, folded into the control centre
- untar-all, unzip-all, resetxdgportal (unreferenced)
- a sxhkd binding hardcoded to /home/sarthak/projects/scribe
- clipboard-manager.sh keyed off XDG_SESSION_TYPE, which is 'tty' here, so it
  only ever printed a Russian error; rewritten on greenclip
- toggle-bar.sh was bound to super+b but did not exist; written

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Cn3dHfbgNYdbZvzb1b3GQt

.config/scripts/volume.sh

@@ -11,7 +11,12 @@ print_error() {
 
 notify_vol() {
   vol=$(get_volume)
-  notify-send -u low "Volume" "${vol}%"
+  local icon label
+  if [[ "${device}" == "input" ]]; then icon="󰍬"; label="Microphone"; else icon="󰕾"; label="Volume"; fi
+  notify-send -a osd -u low \
+    -h "int:value:${vol}" \
+    -h "string:x-dunst-stack-tag:osd-${device}" \
+    "${icon}  ${label}   ${vol}%"
 }
 
 get_volume() {
@@ -63,9 +68,11 @@ action_volume() {
   case "${action}" in
   increase)
     pamixer "${srce}" -i 2
+    notify_vol
     ;;
   decrease)
     pamixer "${srce}" -d 2
+    notify_vol
     ;;
   toggle)
     pamixer "${srce}" -t
@@ -79,10 +86,13 @@ action_volume() {
 }
 
 notify_mute() {
+  local icon label
+  if [[ "${device}" == "input" ]]; then label="Microphone"; else label="Volume"; fi
   if [[ $(pamixer "${srce}" --get-mute) == "true" ]]; then
-    notify-send -u low "Muted"
+    [[ "${device}" == "input" ]] && icon="󰍭" || icon="󰝟"
+    notify-send -a osd -u low -h "string:x-dunst-stack-tag:osd-${device}" "${icon}  ${label} muted"
   else
-    notify-send -u low "Unmuted"
+    notify_vol
   fi
 }