feat: 2FA/TOTP, config templates (v0.11.4 Beta)

- 2FA: TOTP setup wizard in Settings, QR code enrollment, login second-step, password-confirmed disable
- Config templates: reusable DNS/NTP/syslog config sets pushed to selected devices via RouterOS API

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mikrotik-manager-backend",
-  "version": "0.11.3-beta",
+  "version": "0.11.4-beta",
   "description": "Mikrotik Network Management Platform - Backend API",
   "main": "dist/index.js",
   "scripts": {
@@ -26,7 +26,9 @@
     "jsonwebtoken": "^9.0.2",
     "morgan": "^1.10.0",
     "nodemailer": "^8.0.5",
+    "otpauth": "^9.5.1",
     "pg": "^8.11.3",
+    "qrcode": "^1.5.4",
     "socket.io": "^4.6.1",
     "ssh2": "^1.14.0",
     "zod": "^3.22.4"
@@ -43,6 +45,7 @@
     "@types/node": "^20.10.5",
     "@types/nodemailer": "^6.4.14",
     "@types/pg": "^8.10.9",
+    "@types/qrcode": "^1.5.6",
     "@types/ssh2": "^1.11.17",
     "@types/supertest": "^7.2.0",
     "eslint": "^9.39.4",