feat: editable settings page with .env write and container restart

- Add settings form with all config fields (Bot, Commission, Wallets, WireGuard)
- POST handler writes .env file and restarts container via process.exit(0)
- Secrets (ENCRYPTION_KEY, ADMIN_SECRET, GITEA_TOKEN, WG_PRIVATE_KEY, WG_PRESHARED_KEY)
  are never sent to browser - masked placeholders used instead
- PRESERVE_KEYS enforced: secret keys cannot be overwritten via form
- Values sanitized: newlines stripped before writing to .env
- start.sh loads .env file before node to override Docker env_file cache
- Extract shared escapeHtml utility to escape.js (used by 6 view files)
- Update paymentWallets view to link to Settings page instead of .env
- Add .env volume mount for settings panel read/write
- Fix registerRoutes() not being called in index.js (bot menu buttons)

wg/start.sh

@@ -1,5 +1,16 @@
 #!/bin/sh
 
+# Load .env file into environment (overrides Docker env_file cached values)
+if [ -f /app/.env ]; then
+  while IFS='=' read -r key value; do
+    key=$(echo "$key" | xargs)
+    case "$key" in
+      ''|'#'*) continue ;;
+    esac
+    export "$key=$value"
+  done < /app/.env
+fi
+
 # Функция для отображения разделителя
 print_separator() {
   echo "════════════════════════════════════════════════════════════════════════════════"