feat: add web dashboard with slide-in drawer navigation

- Flask backend with 23 API routes (entertainment, telegram, docker, system)
- Alpine.js + Tailwind CSS dark-mode SPA with 4 tabs
- pos-dashboard CLI tool with port/config management
- Mobile slide-in drawer with swipe-to-close
- Sticky header stays pinned on scroll
- Tab completion fixes for category-less tools
- POST /api/telegram/commands endpoint for adding commands

bin/pos-network-ip

@@ -2,6 +2,8 @@
 set -euo pipefail
 # POS: network ip — Show interfaces, routes, public IP + location
 
+source "$(dirname "$0")/../lib/common.sh" 2>/dev/null || source "$(dirname "$0")/common.sh"
+
 usage() {
     cat <<EOF
 Usage: pos network ip
@@ -15,11 +17,7 @@ case "${1:-}" in
     -h|--help) usage ;;
 esac
 
-SEP() { printf '\u2550%.0s' $(seq 1 47); echo; }
-
-SEP
-echo "Network Interfaces"
-SEP
+section "Network Interfaces"
 
 ip -o -4 addr show | while read -r _ ifname _ ipaddr _; do
     printf "%-20s %s\n" "$ifname" "${ipaddr%%/*}"
@@ -27,9 +25,7 @@ done
 
 echo
 
-SEP
-echo "Default Route"
-SEP
+section "Default Route"
 
 gateway=$(ip route | awk '/default/ {print $3; exit}')
 iface=$(ip route | awk '/default/ {print $5; exit}')
@@ -39,9 +35,7 @@ printf "%-20s %s\n" "Gateway" "${gateway:-N/A}"
 
 echo
 
-SEP
-echo "Public IP"
-SEP
+section "Public IP"
 
 PUBLIC_IP=$(curl -4 -s --max-time 5 https://ifconfig.me 2>/dev/null) || true