Refactor Admin and Settings UI to Ethereal Precision aesthetic and improve note import/export functionality

memento-note/app/(admin)/admin/ai/admin-ai-client.tsx

@@ -56,33 +56,33 @@ export function AdminAIPageClient({
       key: 'titleSuggestions' as const,
       label: t('admin.ai.titleSuggestions'),
       description: t('admin.ai.titleSuggestionsDesc'),
-      icon: <Sparkles className="h-4 w-4 text-yellow-500" />,
+      icon: <Sparkles className="h-4 w-4" />,
     },
 
     {
       key: 'paragraphRefactor' as const,
       label: t('admin.ai.aiAssistant'),
       description: t('admin.ai.aiAssistantDesc'),
-      icon: <Brain className="h-4 w-4 text-purple-500" />,
+      icon: <Brain className="h-4 w-4" />,
     },
 
     {
       key: 'memoryEcho' as const,
       label: t('admin.ai.memoryEchoFeature'),
       description: t('admin.ai.memoryEchoFeatureDesc'),
-      icon: <Zap className="h-4 w-4 text-amber-500" />,
+      icon: <Zap className="h-4 w-4" />,
     },
     {
       key: 'languageDetection' as const,
       label: t('admin.ai.languageDetection'),
       description: t('admin.ai.languageDetectionDesc'),
-      icon: <Globe className="h-4 w-4 text-green-500" />,
+      icon: <Globe className="h-4 w-4" />,
     },
     {
       key: 'autoLabeling' as const,
       label: t('admin.ai.autoLabeling'),
       description: t('admin.ai.autoLabelingDesc'),
-      icon: <Tag className="h-4 w-4 text-rose-500" />,
+      icon: <Tag className="h-4 w-4" />,
     },
   ]
 
@@ -91,40 +91,40 @@ export function AdminAIPageClient({
       title: t('admin.ai.activeFeatures'),
       value: String(Object.values(features).filter(Boolean).length) + ' / ' + featureList.length,
       trend: { value: 0, isPositive: true },
-      icon: <Zap className="h-5 w-5 text-yellow-600 dark:text-yellow-400" />,
+      icon: <Zap className="h-5 w-5 text-primary" />,
     },
     {
       title: t('admin.ai.successRate'),
       value: '100%',
       trend: { value: 0, isPositive: true },
-      icon: <TrendingUp className="h-5 w-5 text-green-600 dark:text-green-400" />,
+      icon: <TrendingUp className="h-5 w-5 text-green-600" />,
     },
     {
       title: t('admin.ai.avgResponseTime'),
       value: '—',
       trend: { value: 0, isPositive: true },
-      icon: <Activity className="h-5 w-5 text-primary dark:text-primary-foreground" />,
+      icon: <Activity className="h-5 w-5 text-primary" />,
     },
     {
       title: t('admin.ai.configuredProviders'),
       value: String(providers.filter(p => p.status !== 'Not Configured').length),
-      icon: <Settings className="h-5 w-5 text-purple-600 dark:text-purple-400" />,
+      icon: <Settings className="h-5 w-5 text-primary" />,
     },
   ]
 
   return (
-    <div className="space-y-6">
-      <div className="flex justify-between items-center">
+    <div className="space-y-8">
+      <div className="flex justify-between items-start">
         <div>
-          <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+          <h1 className="text-2xl font-bold tracking-tight text-foreground">
             {t('admin.ai.pageTitle')}
           </h1>
-          <p className="text-gray-600 dark:text-gray-400 mt-1">
+          <p className="text-muted-foreground mt-1">
             {t('admin.ai.pageDescription')}
           </p>
         </div>
         <Link href="/admin/settings">
-          <Button variant="outline">
+          <Button variant="outline" className="border-border">
             <Settings className="mr-2 h-4 w-4" />
             {t('admin.ai.configure')}
           </Button>
@@ -133,25 +133,31 @@ export function AdminAIPageClient({
 
       <AdminMetrics metrics={aiMetrics} />
 
-      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
         {/* Feature Toggles */}
-        <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
-          <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
-            {t('admin.ai.features')}
-          </h2>
-          <div className="space-y-4">
+        <div className="bg-card rounded-lg border border-border p-6 shadow-sm flex flex-col gap-4">
+          <div className="flex items-center gap-3 mb-2">
+            <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+              <Zap className="h-5 w-5" />
+            </div>
+            <div>
+              <h2 className="font-semibold text-foreground">{t('admin.ai.features')}</h2>
+              <p className="text-sm text-muted-foreground">Activez ou désactivez les fonctionnalités IA</p>
+            </div>
+          </div>
+          <div className="space-y-4 pt-2 border-t border-border">
             {featureList.map(({ key, label, description, icon }) => (
               <div
                 key={key}
-                className="flex items-center justify-between p-3 bg-gray-50 dark:bg-zinc-800 rounded-lg"
+                className="flex items-start justify-between p-3 bg-muted rounded-lg border border-border/50"
               >
-                <div className="flex items-center gap-3 flex-1 min-w-0">
-                  {icon}
+                <div className="flex items-start gap-3 flex-1 min-w-0">
+                  <div className="mt-0.5 text-primary">{icon}</div>
                   <div className="min-w-0">
-                    <p className="text-sm font-medium text-gray-900 dark:text-white truncate">
+                    <p className="text-sm font-medium text-foreground truncate">
                       {label}
                     </p>
-                    <p className="text-xs text-gray-500 dark:text-gray-400 truncate">
+                    <p className="text-xs text-muted-foreground truncate">
                       {description}
                     </p>
                   </div>
@@ -160,7 +166,7 @@ export function AdminAIPageClient({
                   checked={features[key]}
                   onCheckedChange={(v) => handleToggle(key, v)}
                   disabled={saving === key}
-                  className="ml-3 flex-shrink-0"
+                  className="ml-3 mt-0.5 flex-shrink-0"
                 />
               </div>
             ))}
@@ -168,42 +174,53 @@ export function AdminAIPageClient({
         </div>
 
         {/* AI Provider Status */}
-        <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
-          <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
-            {t('admin.ai.providerStatus')}
-          </h2>
-          <div className="space-y-3">
-            {providers.map((provider) => (
-              <div
-                key={provider.name}
-                className="flex items-center justify-between p-3 bg-gray-50 dark:bg-zinc-800 rounded-lg"
-              >
-                <p className="text-sm font-medium text-gray-900 dark:text-white">
-                  {provider.name}
-                </p>
-                <span
-                  className={`px-2 py-1 text-xs font-medium rounded-full ${
-                    provider.status === 'Connected' || provider.status === 'Available'
-                      ? 'text-green-700 dark:text-green-400 bg-green-100 dark:bg-green-900'
-                      : 'text-gray-600 dark:text-gray-400 bg-gray-100 dark:bg-gray-800'
-                  }`}
-                >
-                  {provider.status}
-                </span>
+        <div className="flex flex-col gap-6">
+          <div className="bg-card rounded-lg border border-border p-6 shadow-sm flex flex-col gap-4">
+            <div className="flex items-center gap-3 mb-2">
+              <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+                <Settings className="h-5 w-5" />
               </div>
-            ))}
+              <div>
+                <h2 className="font-semibold text-foreground">{t('admin.ai.providerStatus')}</h2>
+                <p className="text-sm text-muted-foreground">État de vos fournisseurs connectés</p>
+              </div>
+            </div>
+            <div className="space-y-3 pt-2 border-t border-border">
+              {providers.map((provider) => (
+                <div
+                  key={provider.name}
+                  className="flex items-center justify-between p-3 bg-muted rounded-lg border border-border/50"
+                >
+                  <p className="text-sm font-medium text-foreground">
+                    {provider.name}
+                  </p>
+                  <span
+                    className={`px-2 py-1 text-xs font-medium rounded-full ${
+                      provider.status === 'Connected' || provider.status === 'Available'
+                        ? 'text-green-700 bg-green-500/10 border border-green-500/20'
+                        : 'text-muted-foreground bg-muted-foreground/10 border border-muted-foreground/20'
+                    }`}
+                  >
+                    {provider.status}
+                  </span>
+                </div>
+              ))}
+            </div>
+          </div>
+
+          <div className="bg-card rounded-lg border border-border p-6 shadow-sm">
+            <h2 className="text-sm font-semibold text-foreground mb-2">
+              {t('admin.ai.recentRequests')}
+            </h2>
+            <div className="p-4 rounded-lg bg-muted border border-border/50 flex flex-col items-center justify-center text-center">
+              <Activity className="h-6 w-6 text-muted-foreground mb-2" />
+              <p className="text-sm text-muted-foreground">
+                {t('admin.ai.comingSoon')}
+              </p>
+            </div>
           </div>
         </div>
       </div>
-
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
-        <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
-          {t('admin.ai.recentRequests')}
-        </h2>
-        <p className="text-gray-600 dark:text-gray-400">
-          {t('admin.ai.comingSoon')}
-        </p>
-      </div>
     </div>
   )
 }

memento-note/app/(admin)/admin/layout.tsx

@@ -1,6 +1,5 @@
 import { AdminHeader } from '@/components/admin-header'
-import { AdminSidebar } from '@/components/admin-sidebar'
-import { AdminContentArea } from '@/components/admin-content-area'
+import { AdminNav } from '@/components/admin-nav'
 
 // Auth is enforced solely by middleware (auth.config.ts → authorized callback).
 // All cross-group navigation (admin ↔ main) uses <a> tags (full page reload)
@@ -11,11 +10,19 @@ export default function AdminLayout({
   children: React.ReactNode
 }) {
   return (
-    <div className="bg-background-light dark:bg-background-dark font-display text-slate-900 dark:text-white flex flex-col min-h-screen">
+    <div className="bg-background flex flex-col min-h-screen">
       <AdminHeader />
-      <div className="flex flex-1">
-        <AdminSidebar />
-        <AdminContentArea>{children}</AdminContentArea>
+      
+      {/* Horizontal Tab Navigation */}
+      <div className="flex items-center gap-1 px-8 bg-background border-b border-border shrink-0">
+        <AdminNav />
+      </div>
+
+      {/* Page Content */}
+      <div className="flex-1 overflow-y-auto">
+        <div className="max-w-5xl mx-auto px-8 py-8 space-y-8">
+          {children}
+        </div>
       </div>
     </div>
   )

memento-note/app/(admin)/admin/page.tsx

@@ -46,7 +46,7 @@ export default async function AdminPage() {
 
       <AdminMetrics metrics={metrics} />
 
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
+      <div className="bg-card rounded-lg shadow-sm overflow-hidden border border-border p-6">
         <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
           Recent Activity
         </h2>

memento-note/app/(admin)/admin/settings/admin-settings-form.tsx

@@ -9,7 +9,7 @@ import { Combobox } from '@/components/ui/combobox'
 import { updateSystemConfig, testEmail } from '@/app/actions/admin-settings'
 import { toast } from 'sonner'
 import { useState, useEffect, useCallback } from 'react'
-import { TestTube, ExternalLink, RefreshCw } from 'lucide-react'
+import { TestTube, ExternalLink, RefreshCw, Shield, Brain, Mail, Wrench } from 'lucide-react'
 import { useLanguage } from '@/lib/i18n'
 
 type AIProvider = 'ollama' | 'openai' | 'custom' | 'deepseek' | 'openrouter' | 'mistral' | 'zai' | 'lmstudio'
@@ -80,6 +80,7 @@ type ModelPurpose = 'tags' | 'embeddings' | 'chat'
 
 export function AdminSettingsForm({ config }: { config: Record<string, string> }) {
   const { t } = useLanguage()
+  const [activeAiTab, setActiveAiTab] = useState<'tags' | 'embeddings' | 'chat'>('tags')
   const [isSaving, setIsSaving] = useState(false)
   const [isTesting, setIsTesting] = useState(false)
 
@@ -546,14 +547,19 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
   ]
 
   return (
-    <div className="space-y-6">
-      <Card>
-        <CardHeader>
-          <CardTitle>{t('admin.security.title')}</CardTitle>
-          <CardDescription>{t('admin.security.description')}</CardDescription>
-        </CardHeader>
+    <div className="columns-1 lg:columns-2 gap-6">
+      <div className="bg-card rounded-lg border border-border shadow-sm overflow-hidden break-inside-avoid mb-6">
+        <div className="flex items-center gap-3 p-6 border-b border-border">
+          <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+            <Shield className="h-5 w-5" />
+          </div>
+          <div>
+            <h2 className="font-semibold text-foreground">{t('admin.security.title')}</h2>
+            <p className="text-sm text-muted-foreground">{t('admin.security.description')}</p>
+          </div>
+        </div>
         <form onSubmit={(e) => { e.preventDefault(); handleSaveSecurity(new FormData(e.currentTarget)) }}>
-          <CardContent className="space-y-4">
+          <div className="p-6 space-y-4">
             <div className="flex items-center space-x-2">
               <Checkbox
                 id="ALLOW_REGISTRATION"
@@ -570,22 +576,34 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
             <p className="text-xs text-muted-foreground">
               {t('admin.security.allowPublicRegistrationDescription')}
             </p>
-          </CardContent>
-          <CardFooter>
+          </div>
+          <div className="px-6 pb-6">
             <Button type="submit" disabled={isSaving}>{t('admin.security.title')}</Button>
-          </CardFooter>
+          </div>
         </form>
-      </Card>
+      </div>
 
-      <Card>
-        <CardHeader>
-          <CardTitle>{t('admin.ai.title')}</CardTitle>
-          <CardDescription>{t('admin.ai.description')}</CardDescription>
-        </CardHeader>
+      <div className="bg-card rounded-lg border border-border shadow-sm overflow-hidden break-inside-avoid mb-6">
+        <div className="flex items-center gap-3 p-6 border-b border-border">
+          <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+            <Brain className="h-5 w-5" />
+          </div>
+          <div>
+            <h2 className="font-semibold text-foreground">{t('admin.ai.title')}</h2>
+            <p className="text-sm text-muted-foreground">{t('admin.ai.description')}</p>
+          </div>
+        </div>
         <form onSubmit={(e) => { e.preventDefault(); handleSaveAI(new FormData(e.currentTarget)) }}>
-          <CardContent className="space-y-6">
+          <div className="px-6 pt-6">
+            <div className="flex border-b border-border/50 overflow-x-auto">
+              <button type="button" onClick={() => setActiveAiTab('tags')} className={`px-4 py-2.5 text-sm font-medium border-b-2 whitespace-nowrap ${activeAiTab === 'tags' ? 'border-primary text-primary' : 'border-transparent text-muted-foreground hover:text-foreground hover:border-border'}`}>🏷️ Tags</button>
+              <button type="button" onClick={() => setActiveAiTab('embeddings')} className={`px-4 py-2.5 text-sm font-medium border-b-2 whitespace-nowrap ${activeAiTab === 'embeddings' ? 'border-primary text-primary' : 'border-transparent text-muted-foreground hover:text-foreground hover:border-border'}`}>🔍 Embeddings</button>
+              <button type="button" onClick={() => setActiveAiTab('chat')} className={`px-4 py-2.5 text-sm font-medium border-b-2 whitespace-nowrap ${activeAiTab === 'chat' ? 'border-primary text-primary' : 'border-transparent text-muted-foreground hover:text-foreground hover:border-border'}`}>💬 Chat</button>
+            </div>
+          </div>
+          <div className="p-6 space-y-6">
             {/* Tags Generation Provider */}
-            <div className="space-y-4 p-4 border rounded-lg bg-primary/5 dark:bg-primary/10">
+            <div className={`space-y-4 p-4 border border-border/50 rounded-lg bg-muted/50 ${activeAiTab === 'tags' ? 'block' : 'hidden'}`}>
               <h3 className="text-base font-semibold flex items-center gap-2">
                 <span className="text-primary">🏷️</span> {t('admin.ai.tagsGenerationProvider')}
               </h3>
@@ -615,7 +633,7 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
             </div>
 
             {/* Embeddings Provider */}
-            <div className="space-y-4 p-4 border rounded-lg bg-green-50/50 dark:bg-green-950/20">
+            <div className={`space-y-4 p-4 border border-border/50 rounded-lg bg-muted/50 ${activeAiTab === 'embeddings' ? 'block' : 'hidden'}`}>
               <h3 className="text-base font-semibold flex items-center gap-2">
                 <span className="text-green-600">🔍</span> {t('admin.ai.embeddingsProvider')}
               </h3>
@@ -650,7 +668,7 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
             </div>
 
             {/* Chat Provider */}
-            <div className="space-y-4 p-4 border rounded-lg bg-blue-50/50 dark:bg-blue-950/20">
+            <div className={`space-y-4 p-4 border border-border/50 rounded-lg bg-muted/50 ${activeAiTab === 'chat' ? 'block' : 'hidden'}`}>
               <h3 className="text-base font-semibold flex items-center gap-2">
                 <span className="text-blue-600">💬</span> {t('admin.ai.chatProvider')}
               </h3>
@@ -678,8 +696,8 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
               <input type="hidden" name="AI_MODEL_CHAT" value={selectedChatModel} />
               {renderProviderConfig(chatProvider, 'chat', selectedChatModel, setSelectedChatModel)}
             </div>
-          </CardContent>
-          <CardFooter className="flex justify-between pt-6">
+          </div>
+          <div className="px-6 pb-6 flex flex-col sm:flex-row gap-3 sm:justify-between pt-6">
             <Button type="submit" disabled={isSaving}>{isSaving ? t('admin.ai.saving') : t('admin.ai.saveSettings')}</Button>
             <a href="/admin/ai-test">
               <Button type="button" variant="outline" className="gap-2">
@@ -688,17 +706,22 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
                 <ExternalLink className="h-3 w-3" />
               </Button>
             </a>
-          </CardFooter>
+          </div>
         </form>
-      </Card>
+      </div>
 
-      <Card>
-        <CardHeader>
-          <CardTitle>{t('admin.email.title')}</CardTitle>
-          <CardDescription>{t('admin.email.description')}</CardDescription>
-        </CardHeader>
+      <div className="bg-card rounded-lg border border-border shadow-sm overflow-hidden break-inside-avoid mb-6">
+        <div className="flex items-center gap-3 p-6 border-b border-border">
+          <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+            <Mail className="h-5 w-5" />
+          </div>
+          <div>
+            <h2 className="font-semibold text-foreground">{t('admin.email.title')}</h2>
+            <p className="text-sm text-muted-foreground">{t('admin.email.description')}</p>
+          </div>
+        </div>
         <form onSubmit={(e) => { e.preventDefault(); handleSaveEmail(new FormData(e.currentTarget)) }}>
-          <CardContent className="space-y-4">
+          <div className="p-6 space-y-4">
             <div className="space-y-2">
               <label className="text-sm font-medium">{t('admin.email.provider')}</label>
               <div className="flex gap-2">
@@ -826,23 +849,28 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
                 </div>
               </div>
             )}
-          </CardContent>
-          <CardFooter className="flex justify-between pt-6">
+          </div>
+          <div className="px-6 pb-6 flex flex-col sm:flex-row gap-3 sm:justify-between pt-6">
             <Button type="submit" disabled={isSaving}>{t('admin.email.saveSettings')}</Button>
             <Button type="button" variant="secondary" onClick={handleTestEmail} disabled={isTesting}>
               {isTesting ? t('admin.smtp.sending') : t('admin.smtp.testEmail')}
             </Button>
-          </CardFooter>
+          </div>
         </form>
-      </Card>
+      </div>
 
-      <Card>
-        <CardHeader>
-          <CardTitle>{t('admin.tools.title')}</CardTitle>
-          <CardDescription>{t('admin.tools.description')}</CardDescription>
-        </CardHeader>
+      <div className="bg-card rounded-lg border border-border shadow-sm overflow-hidden break-inside-avoid mb-6">
+        <div className="flex items-center gap-3 p-6 border-b border-border">
+          <div className="w-10 h-10 rounded-full bg-primary/10 flex items-center justify-center text-primary shrink-0">
+            <Wrench className="h-5 w-5" />
+          </div>
+          <div>
+            <h2 className="font-semibold text-foreground">{t('admin.tools.title')}</h2>
+            <p className="text-sm text-muted-foreground">{t('admin.tools.description')}</p>
+          </div>
+        </div>
         <form onSubmit={(e) => { e.preventDefault(); handleSaveTools(new FormData(e.currentTarget)) }}>
-          <CardContent className="space-y-4">
+          <div className="p-6 space-y-4">
             <div className="space-y-2">
               <label htmlFor="WEB_SEARCH_PROVIDER" className="text-sm font-medium">{t('admin.tools.searchProvider')}</label>
               <select
@@ -880,13 +908,13 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
 
             {/* Search test result */}
             {searchTestResult && (
-              <div className={`rounded-lg border p-3 text-sm flex items-start gap-2 ${searchTestResult.success ? 'border-green-200 bg-green-50 text-green-800 dark:border-green-800 dark:bg-green-950/30 dark:text-green-300' : 'border-red-200 bg-red-50 text-red-800 dark:border-red-800 dark:bg-red-950/30 dark:text-red-300'}`}>
+              <div className={`rounded-lg border p-3 text-sm flex items-start gap-2 ${searchTestResult.success ? 'border-green-500/20 bg-green-500/10 text-green-600' : 'border-red-500/20 bg-red-500/10 text-red-600'}`}>
                 <span className={`mt-0.5 inline-block w-2 h-2 rounded-full flex-shrink-0 ${searchTestResult.success ? 'bg-green-500' : 'bg-red-500'}`} />
                 <span>{searchTestResult.message}</span>
               </div>
             )}
-          </CardContent>
-          <CardFooter className="flex justify-between">
+          </div>
+          <div className="px-6 pb-6 flex flex-col sm:flex-row gap-3 sm:justify-between">
             <Button type="submit" disabled={isSaving}>{t('admin.tools.saveSettings')}</Button>
             <Button
               type="button"
@@ -896,9 +924,9 @@ export function AdminSettingsForm({ config }: { config: Record<string, string> }
             >
               {isTestingSearch ? t('admin.tools.testing') : t('admin.tools.testSearch')}
             </Button>
-          </CardFooter>
+          </div>
         </form>
-      </Card>
+      </div>
     </div>
   )
 }

memento-note/app/(admin)/admin/settings/page.tsx

@@ -6,11 +6,9 @@ export default async function AdminSettingsPage() {
   const config = await getSystemConfig()
 
   return (
-    <div className="space-y-6">
+    <div className="space-y-8">
       <SettingsHeader />
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
-        <AdminSettingsForm config={config} />
-      </div>
+      <AdminSettingsForm config={config} />
     </div>
   )
 }

memento-note/app/(admin)/admin/settings/settings-header.tsx

@@ -6,10 +6,10 @@ export function SettingsHeader() {
   const { t } = useLanguage()
   return (
     <div>
-      <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+      <h1 className="text-2xl font-bold tracking-tight text-foreground">
         {t('admin.settings')}
       </h1>
-      <p className="text-gray-600 dark:text-gray-400 mt-1">
+      <p className="text-muted-foreground mt-1">
         {t('admin.settingsDescription')}
       </p>
     </div>

memento-note/app/(admin)/admin/users/page.tsx

@@ -21,7 +21,7 @@ export default async function AdminUsersPage() {
         <CreateUserDialog />
       </div>
 
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800">
+      <div className="bg-card rounded-lg shadow-sm overflow-hidden border border-border">
         <UserList initialUsers={users} />
       </div>
     </div>