fix(web): upgrade vite and restore devfront build

- switch adminfront and devfront to vite 8
- fix devfront TypeScript baseline build errors
- require Node.js 24 LTS or newer in package metadata and docs

Co-Authored-By: First Fluke <our.first.fluke@gmail.com>

devfront/package.json

@@ -3,6 +3,9 @@
   "private": true,
   "version": "0.0.0",
   "type": "module",
+  "engines": {
+    "node": ">=24.0.0"
+  },
   "scripts": {
     "dev": "vite --host 0.0.0.0",
     "build": "tsc -b && vite build",
@@ -44,9 +47,6 @@
     "tailwindcss": "^3.4.14",
     "tailwindcss-animate": "^1.0.7",
     "typescript": "~5.9.3",
-    "vite": "npm:rolldown-vite@7.2.5"
-  },
-  "overrides": {
-    "vite": "npm:rolldown-vite@7.2.5"
+    "vite": "^8.0.0"
   }
 }