Autostart apps, powermenu on Super+Shift+E, tmux and sysadmin shell helpers

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

home/.oh-my-zsh/custom/sysadmin.zsh

@@ -0,0 +1,36 @@
+# Sysadmin helpers. Tools that are not installed are skipped silently.
+
+# --- systemd / logs / network ---
+alias sc='systemctl'
+alias scu='systemctl --user'
+alias jc='journalctl'
+alias jcf='journalctl -f'
+alias jce='journalctl -p err -b'          # errors since boot
+alias ports='ss -tulpn'                   # listening sockets
+alias myip='curl -s ifconfig.me; echo'
+alias df='df -hT -x tmpfs -x devtmpfs'
+alias free='free -h'
+alias dnfu='sudo dnf upgrade --refresh'
+
+# --- safer defaults ---
+alias cp='cp -iv'
+alias mv='mv -iv'
+alias mkdir='mkdir -pv'
+
+# --- nicer replacements, enabled when installed ---
+if command -v eza >/dev/null; then
+    alias ls='eza --icons --group-directories-first'
+    alias ll='eza -lah --icons --group-directories-first --git'
+    alias lt='eza --tree --level=2 --icons'
+else
+    alias ll='ls -lah --color=auto'
+fi
+command -v bat >/dev/null && alias cat='bat --paging=never --style=plain'
+command -v zoxide >/dev/null && eval "$(zoxide init zsh)"
+if command -v fzf >/dev/null; then
+    for f in /usr/share/fzf/shell/key-bindings.zsh /usr/share/fzf/shell/completion.zsh; do [ -r "$f" ] && source "$f"; done
+    export FZF_DEFAULT_OPTS='--height=40% --layout=reverse --border --color=bg+:#3b4261,fg+:#c0caf5,hl:#bb9af7,hl+:#bb9af7,pointer:#ff9e64,prompt:#7dcfff'
+fi
+
+# --- tmux: attach to "main" or create it ---
+tm() { tmux new-session -A -s "${1:-main}"; }