Upgrade to Vite 8 and Tailwind CSS 4 (#595)

- Vite 6 → 8 (Rolldown bundler), laravel-vite-plugin 1 → 3, @vitejs/plugin-vue 5 → 6
- Tailwind CSS 3 → 4 with CSS-based config (@theme, @plugin, @utility)
- Add @tailwindcss/vite plugin, remove postcss/autoprefixer/sass
- Convert SCSS files to plain CSS (resources/sass → resources/css)
- Migrate tailwind.config.js to CSS @theme directives
- Rename deprecated utility classes (shadow-sm→shadow-xs, outline-none→outline-hidden,
  rounded-sm→rounded-xs, bg-gradient-to→bg-linear-to, ring→ring-3)
- Migrate opacity utilities to color modifiers (bg-opacity, text-opacity,
  border-opacity, ring-opacity → color/N syntax)
- Update primary color CSS vars to full rgb() values for TW4 color-mix()
- Fix border-l color specificity for sidebar navigation (TW4 default border
  color changed from gray-200 to currentColor)
- Fix invalid border color classes (border-grey-light, border-modal-bg, border--200)
- Add @reference directive for @apply in Vue component style blocks
- Convert Vue component <style lang="scss"> blocks to plain CSS

resources/scripts/admin/views/modules/View.vue

@@ -32,7 +32,7 @@
                 :class="[
                   'relative  md:h-24 lg:h-36 rounded hover:bg-gray-50',
                   {
-                    'outline-none ring ring-offset-1 ring-primary-500':
+                    'outline-hidden ring-3 ring-offset-1 ring-primary-500':
                       displayVideo,
                   },
                 ]"
@@ -66,7 +66,7 @@
                 :class="[
                   'relative  md:h-24 lg:h-36 rounded hover:bg-gray-50',
                   {
-                    'outline-none ring ring-offset-1 ring-primary-500':
+                    'outline-hidden ring-3 ring-offset-1 ring-primary-500':
                       displayImage === screenshot.url,
                   },
                 ]"
@@ -195,7 +195,7 @@
                     checked
                       ? 'bg-primary-50 border-primary-200 z-10'
                       : 'border-gray-200',
-                    'relative border p-4 flex flex-col cursor-pointer md:pl-4 md:pr-6 md:grid md:grid-cols-2 focus:outline-none',
+                    'relative border p-4 flex flex-col cursor-pointer md:pl-4 md:pr-6 md:grid md:grid-cols-2 focus:outline-hidden',
                   ]"
                 >
                   <div class="flex items-center text-sm">

resources/scripts/admin/views/modules/partials/ModuleCard.vue

@@ -3,7 +3,7 @@
     class="
       relative
       shadow-md
-      border-2 border-gray-200 border-opacity-60
+      border-2 border-gray-200/60
       rounded-lg
       cursor-pointer
       overflow-hidden
@@ -18,7 +18,7 @@
       <label
         v-if="data.purchased"
         class="
-          bg-white bg-opacity-75
+          bg-white/75
           text-xs
           px-3
           py-1
@@ -33,7 +33,7 @@
         v-if="data.installed"
         class="
           ml-2
-          bg-white bg-opacity-75
+          bg-white/75
           text-xs
           px-3
           py-1

resources/scripts/admin/views/modules/partials/ModuleCardPlaceholder.vue

@@ -3,7 +3,7 @@
     <div
       class="
         shadow-md
-        border-2 border-gray-200 border-opacity-60
+        border-2 border-gray-200/60
         rounded-lg
         cursor-pointer
         overflow-hidden

resources/scripts/admin/views/modules/partials/RecentModuleCard.vue

@@ -10,7 +10,7 @@
           <div
             class="
               w-full
-              bg-white bg-opacity-75
+              bg-white/75
               backdrop-filter backdrop-blur
               py-2
               px-4