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/rofi/control.rasi

@@ -0,0 +1,83 @@
+/* Sakura Line - control centre panel */
+* {
+    main-bg:            #0f0d17;
+    main-bg-trans:      #0f0d17d9;
+    main-fg:            #e9eefb;
+    accent:             #92b9ea;
+    urgent:             #e0798f;
+    select-bg:          #92b9ea2b;
+    select-fg:          #cfe0f7;
+    dim:                #7f7796;
+    border-color:       #3d3752;
+
+    background-color:   transparent;
+    text-color:         @main-fg;
+}
+
+window {
+    transparency:       "real";
+    background-color:   @main-bg-trans;
+    border:             1px;
+    border-color:       @border-color;
+    border-radius:      14px;
+    width:              560px;
+    padding:            0px;
+    location:           center;
+    anchor:             center;
+}
+
+mainbox {
+    padding:            0px;
+    spacing:            0px;
+    children:           [ inputbar, listview ];
+}
+
+inputbar {
+    padding:            16px 20px;
+    spacing:            0px;
+    border:             0px 0px 1px 0px;
+    border-color:       @border-color;
+    children:           [ prompt, entry ];
+}
+
+prompt {
+    text-color:         @accent;
+    padding:            0px 12px 0px 0px;
+    vertical-align:     0.5;
+    font:               "JetBrainsMono Nerd Font Bold 13";
+}
+
+entry {
+    text-color:         @main-fg;
+    placeholder:        "type to filter";
+    placeholder-color:  @dim;
+    vertical-align:     0.5;
+    cursor:             text;
+    font:               "JetBrainsMono Nerd Font 13";
+}
+
+listview {
+    lines:              14;
+    columns:            1;
+    fixed-height:       false;
+    scrollbar:          false;
+    padding:            10px 10px 14px 10px;
+    spacing:            2px;
+}
+
+element {
+    padding:            10px 12px;
+    border-radius:      9px;
+    text-color:         @main-fg;
+}
+
+element selected {
+    background-color:   @select-bg;
+    text-color:         @select-fg;
+}
+
+element-text {
+    text-color:         inherit;
+    vertical-align:     0.5;
+    font:               "JetBrainsMono Nerd Font 12";
+}