feat: migrate to Nuxt 4 (Nitro) and Tailwind CSS v3

nuxt.config.ts

@@ -0,0 +1,43 @@
+export default defineNuxtConfig({
+  compatibilityDate: "2025-07-15",
+  modules: ["@nuxtjs/tailwindcss"],
+  // Target: Cloudflare Workers (single _worker.js via the cloudflare_module preset).
+  nitro: {
+    preset: "cloudflare_module",
+    errorHandler: "~~/server/error-handler",
+    experimental: {
+      tasks: true,
+    },
+    scheduledTasks: {
+      "*/5 * * * *": ["discord-sync", "telegram-sync", "audit-prune"],
+    },
+  },
+  app: {
+    head: {
+      title: "WebHooker",
+      link: [
+        {
+          rel: "stylesheet",
+          href: "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap",
+        },
+      ],
+    },
+  },
+  tailwindcss: {
+    cssPath: "~/assets/css/main.css",
+    configPath: "tailwind.config",
+  },
+  devtools: { enabled: false },
+  runtimeConfig: {
+    // Overridable via NUXT_PUBLIC_DOCS_URL / NUXT_PUBLIC_REPO_URL.
+    public: {
+      docsUrl: "",
+      repoUrl: "",
+    },
+  },
+  // The config console stays a client-side SPA (same behavior as the old
+  // standalone admin app); home/legal pages render server-side.
+  routeRules: {
+    "/admin/**": { ssr: false },
+  },
+});