Use deno typescript instead of node. Fix compilation errors for updated typescript. update setup script to install deno. use tmux when running localling for all processes.

dev.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+set -e
+
+SESSION="dandelion"
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+
+# Kill any existing session
+tmux kill-session -t "$SESSION" 2>/dev/null || true
+
+# Create session with tsc in the first pane
+tmux new-session -d -s "$SESSION" -c "$ROOT"
+tmux send-keys -t "$SESSION" 'deno task watch' Enter
+
+# Split right: deno server
+tmux split-window -h -t "$SESSION" -c "$ROOT/deno"
+tmux send-keys -t "$SESSION" 'bash dev.sh' Enter
+
+# Split right: ddln_cli
+tmux split-window -h -t "$SESSION" -c "$ROOT/ddln_cli"
+tmux send-keys -t "$SESSION" 'bash dev.sh' Enter
+
+tmux select-layout -t "$SESSION" even-horizontal
+
+# Open Chrome silently after a short delay
+(sleep 3 && open -a "Google Chrome" "https://localhost:8443" &>/dev/null) &
+
+tmux attach-session -t "$SESSION"