chore(web): update Next.js config, Tailwind config, and type definitions

Sync next-env.d.ts, update next.config.js and tailwind.config.ts with
latest settings, and refresh tsconfig build info.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/tailwind.config.ts

@@ -6,6 +6,9 @@ const config: Config = {
   content: ['./app/**/*.{ts,tsx}', './components/**/*.{ts,tsx}', './lib/**/*.{ts,tsx}'],
   theme: {
     extend: {
+      fontFamily: {
+        sans: ['var(--font-inter)', 'system-ui', 'sans-serif'],
+      },
       colors: {
         border: 'hsl(var(--border))',
         input: 'hsl(var(--input))',