feat: AI-CLI workflow optimizations

- 200K scrollback, vi-mode copy, copy-on-select
- Ctrl-A S captures pane to ~/logs/, Ctrl-A L toggles live logging
- Status bar shows git branch + working directory
- Pre-built session: code/git/run/logs windows
- Aggressive resize + focus events for multi-device switching
- Toolbar: added Paste (clipboard), Zoom (pane fullscreen), Save (capture)
- All new windows inherit current working directory
- Toolbar split into 2 rows for more buttons without clutter

sethmux-start.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# Start sethmux session with AI-workflow windows
+SESSION="sethmux"
+
+# Kill stale session
+tmux kill-session -t "$SESSION" 2>/dev/null
+sleep 0.5
+
+# Create session with named windows
+tmux new-session -d -s "$SESSION" -n "code" -x 120 -y 40
+tmux new-window -t "$SESSION" -n "git"
+tmux new-window -t "$SESSION" -n "run"
+tmux new-window -t "$SESSION" -n "logs"
+tmux select-window -t "$SESSION:1"
+
+# Ensure logs dir exists
+mkdir -p ~/logs