feat(ui): redesign with transparent liquid glass (#414)

* docs: add design spec for iOS 26 Liquid Glass UI redesign

* docs: add implementation plan for iOS 26 Liquid Glass UI redesign

* feat(ui): add liquid glass CSS variables and update root layouts

* feat(ui): update Card and Modal components to iOS 26 Liquid Glass style

* feat(ui): redesign dashboard page to Liquid Glass style

* feat(ui): redesign node management page cards and charts

* feat(ui): redesign monitor page to Liquid Glass style

* feat(ui): redesign group and panel-sharing cards to Liquid Glass

* feat(ui): redesign settings and user components to Liquid Glass

* feat(ui): redesign profile and auth pages to Liquid Glass

* fix(ui): revert to LineChart to fix compilation issues

* refactor(ui): extract dashboard user header and cleanup admin layout

* feat(ui): refine monitor page hero metrics and fix build

* fix(ui): real data for monitor hero metrics and card padding adjustments

* fix(ui): apply global card padding and fix index layouts

* feat(ui): implement liquid-glass-react for all Card components

* fix(ui): resolve liquid-glass-react rendering issues causing invisible text and broken layout

* fix(ui): native CSS liquid-glass effect replacing NPM package

* fix(ui): cleanup duplicate closing tags and complete liquid glass tables

* fix(ui): apply perfect rounded corners to list views and table headers in non-compact mode

* fix(ui): apply liquid glass styling to grouped rules view in forward page

* fix(ui): re-implement liquid-glass natively to prevent text distortion and remove package dependency

* fix(ui): remove mouse distortion and preserve proper liquid glass texture

* fix(ui): remove svg filter causing text distortion and replace with pure css liquid glass

* fix(ui): apply properly scoped border radius to table headers

* fix(ui): remove hardcoded bg-default-50/60 from TableHeader

* fix(ui): apply global liquid glass styling and transparent overlays to all modals and dialogs

* fix(ui): remove absolute/relative class conflicts hiding Dialog modales and implement pure transparent layout

* feat(ui): apply global liquid glass styling to cards, buttons, and diagnosis modals

vite-frontend/src/App.tsx

@@ -46,7 +46,7 @@ const ProtectedRoute = ({
 
   if (!authenticated) {
     return (
-      <div className="flex items-center justify-center min-h-screen bg-white dark:bg-black">
+      <div className="flex items-center justify-center min-h-screen bg-mesh-gradient">
         <div className="text-lg text-gray-700 dark:text-gray-200" />
       </div>
     );
@@ -78,7 +78,7 @@ const LoginRoute = () => {
 
   if (authenticated) {
     return (
-      <div className="flex items-center justify-center min-h-screen bg-gray-100 dark:bg-black">
+      <div className="flex items-center justify-center min-h-screen bg-mesh-gradient">
         <div className="text-lg text-gray-700 dark:text-gray-200" />
       </div>
     );