Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

apps/web/styles/makerkit.css

@@ -4,22 +4,6 @@
 * Makerkit-specific global styles
 * Use this file to add any global styles that are specific to Makerkit's components
  */
-
-/*
-Optimize dropdowns for mobile
- */
-[data-radix-popper-content-wrapper] {
-  @apply w-full md:w-auto;
-}
-
-[data-radix-menu-content] {
-  @apply w-full rounded-none md:w-auto md:rounded-lg;
-}
-
-[data-radix-menu-content] [role='menuitem'] {
-  @apply min-h-12 md:min-h-0;
-}
-
 .site-header > .container:before,
 .site-footer > .container:before {
   background: radial-gradient(