feat: add qBittorrent as optional app with theme support

bin/omakub-sub/theme.sh

@@ -25,6 +25,12 @@ if [ -n "$THEME" ] && [ "$THEME" != "<<-back" ]; then
   # Forgo setting the Chrome theme until we might find a less disruptive way of doing it.
   # Having to quit Chrome, and all Chrome-based apps, is too much of an inposition.
   # source $OMAKUB_PATH/themes/$THEME/chrome.sh
+
+  # qBittorrent theme (only if qBittorrent is installed)
+  if [ -d "$HOME/.config/qBittorrent" ] && [ -f "$OMAKUB_PATH/themes/$THEME/qbittorrent.qbtheme" ]; then
+    mkdir -p ~/.config/qBittorrent/themes
+    cp $OMAKUB_PATH/themes/$THEME/qbittorrent.qbtheme ~/.config/qBittorrent/themes/theme.qbtheme
+  fi
 fi
 
 source $OMAKUB_PATH/bin/omakub-sub/menu.sh

install/desktop/optional/app-qbittorrent.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# qBittorrent is a free and open-source BitTorrent client. See https://www.qbittorrent.org/
+sudo add-apt-repository -y ppa:qbittorrent-team/qbittorrent-stable
+sudo apt update
+sudo apt install -y qbittorrent
+
+# Set up default theme (tokyo-night)
+mkdir -p ~/.config/qBittorrent/themes
+cp ~/.local/share/omakub/themes/tokyo-night/qbittorrent.qbtheme ~/.config/qBittorrent/themes/theme.qbtheme
+
+# Pre-configure qBittorrent to use custom theme
+if [ ! -f ~/.config/qBittorrent/qBittorrent.conf ]; then
+  cat > ~/.config/qBittorrent/qBittorrent.conf << 'EOF'
+[LegalNotice]
+Accepted=true
+
+[Preferences]
+General\CustomUIThemePath=/home/$USER/.config/qBittorrent/themes/theme.qbtheme
+General\UseCustomUITheme=true
+EOF
+  sed -i "s|\$USER|$USER|g" ~/.config/qBittorrent/qBittorrent.conf
+fi

uninstall/app-qbittorrent.sh

@@ -0,0 +1 @@
+sudo apt remove --purge -y qbittorrent