Enhance shell widgets, tmux status, and git colors

- Add frecency scoring + git status boost to ^E edit widget
- Add network latency indicator to tmux status bar (wifi/wired detection, 10s cache)
- Add powerline separators between tmux status sections
- Swap git status colors: modified=bluish grey, untracked=amber (prompt, gitconfig, widget)
- Remove bold from feature branch name in prompt
- Add gw (git show) and gdm (diff against default branch) aliases

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

home/.aliases

@@ -37,6 +37,8 @@ alias gc='git c'
 alias gl='git ld'
 alias ga='git a'
 alias gr='git r'
+alias gw='git show'
+gdm() { local base="${1:-$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's@refs/remotes/origin/@@' || echo main)}"; git diff "${base}...HEAD"; }
 
 # fzf workflows
 gb() { local b; b="$(git branch --all --sort=-committerdate --format='%(refname:short)' | fzf --preview 'git log --oneline --color -20 {}')" && git checkout "${b#origin/}"; }