Modernize dependencies: replace abandoned packages, update versions

- Replace flowframe/laravel-trend with direct Eloquent DB queries
- Replace srmklive/paypal (abandoned) with new PayPalService using PayPal REST API v2 via Guzzle
- Remove old config/paypal.php, migrate to config('habbo.paypal.*')
- Update blade templates to use habbo.paypal config
- Bump npm packages to latest: @inertiajs/react, axios, esbuild, eslint, sass, tailwindcss, etc.
- Run composer update and yarn upgrade

public/build/manifest.json

@@ -111,7 +111,7 @@
     "src": "public/assets/images/profile/profile-bg.png"
   },
   "resources/css/global.css": {
-    "file": "assets/global-DmKtm1TC.css",
+    "file": "assets/global-D3hwr7UE.css",
     "name": "global",
     "names": [
       "global.css"
@@ -166,7 +166,7 @@
     ]
   },
   "resources/themes/atom/css/app.css": {
-    "file": "assets/app-DtTGSxkD.css",
+    "file": "assets/app-BXjZsuSm.css",
     "name": "app",
     "names": [
       "app.css"