Release v2.20.1: migrate authentication to Better Auth

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pulse-signage",
-  "version": "2.19.3",
+  "version": "2.20.1",
   "private": false,
   "description": "Pulse Signage application with MySQL and media storage",
   "engines": {
@@ -21,10 +21,13 @@
     "start:player": "node -r dotenv/config src/player.js",
     "dev:web": "nodemon -r dotenv/config src/web.js",
     "dev:player": "nodemon -r dotenv/config src/player.js",
+    "build:auth-client": "esbuild src/web/public/js/auth/passkey-client-entry.js --bundle --minify --format=iife --outfile=src/web/public/js/auth/passkey-client.js",
     "test": "node --test test/*.test.js"
   },
   "dependencies": {
+    "@better-auth/passkey": "^1.7.13",
     "animate.css": "^4.1.1",
+    "better-auth": "^1.7.13",
     "bootstrap-icons": "1.13.1",
     "chart.js": "^4.5.1",
     "cropperjs": "^1.6.2",
@@ -41,6 +44,7 @@
     "ws": "^8.21.3"
   },
   "devDependencies": {
+    "esbuild": "^0.28.2",
     "nodemon": "^3.1.10"
   }
 }