fix: unify theme system - fix theme switching persistence

- Unified localStorage key to 'theme-preference' across all components
- Fixed header.tsx using wrong localStorage key ('theme' instead of 'theme-preference')
- Added localStorage hybrid persistence for instant theme changes
- Removed router.refresh() which was causing stale data revert
- Replaced Blue theme with Sepia
- Consolidated auth() calls to prevent race conditions
- Updated UserSettingsData types to include all themes

keep-notes/app/(main)/admin/ai/page.tsx

@@ -0,0 +1,127 @@
+import { AdminMetrics } from '@/components/admin-metrics'
+import { Button } from '@/components/ui/button'
+import { Zap, Settings, Activity, TrendingUp } from 'lucide-react'
+
+export default async function AdminAIPage() {
+  // Mock AI metrics - in a real app, these would come from analytics
+  const aiMetrics = [
+    {
+      title: 'Total Requests',
+      value: '856',
+      trend: { value: 12, isPositive: true },
+      icon: <Zap className="h-5 w-5 text-yellow-600 dark:text-yellow-400" />,
+    },
+    {
+      title: 'Success Rate',
+      value: '98.5%',
+      trend: { value: 2, isPositive: true },
+      icon: <TrendingUp className="h-5 w-5 text-green-600 dark:text-green-400" />,
+    },
+    {
+      title: 'Avg Response Time',
+      value: '1.2s',
+      trend: { value: 5, isPositive: true },
+      icon: <Activity className="h-5 w-5 text-blue-600 dark:text-blue-400" />,
+    },
+    {
+      title: 'Active Features',
+      value: '6',
+      icon: <Settings className="h-5 w-5 text-purple-600 dark:text-purple-400" />,
+    },
+  ]
+
+  return (
+    <div className="space-y-6">
+      <div className="flex justify-between items-center">
+        <div>
+          <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+            AI Management
+          </h1>
+          <p className="text-gray-600 dark:text-gray-400 mt-1">
+            Monitor and configure AI features
+          </p>
+        </div>
+        <Button variant="outline">
+          <Settings className="mr-2 h-4 w-4" />
+          Configure
+        </Button>
+      </div>
+
+      <AdminMetrics metrics={aiMetrics} />
+
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+        <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">
+            Active AI Features
+          </h2>
+          <div className="space-y-3">
+            {[
+              'Title Suggestions',
+              'Semantic Search',
+              'Paragraph Reformulation',
+              'Memory Echo',
+              'Language Detection',
+              'Auto Labeling',
+            ].map((feature) => (
+              <div
+                key={feature}
+                className="flex items-center justify-between p-3 bg-gray-50 dark:bg-zinc-800 rounded-lg"
+              >
+                <span className="text-sm text-gray-900 dark:text-white">
+                  {feature}
+                </span>
+                <span className="px-2 py-1 text-xs font-medium text-green-700 dark:text-green-400 bg-green-100 dark:bg-green-900 rounded-full">
+                  Active
+                </span>
+              </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">
+            AI Provider Status
+          </h2>
+          <div className="space-y-3">
+            {[
+              { name: 'OpenAI', status: 'Connected', requests: '642' },
+              { name: 'Ollama', status: 'Available', requests: '214' },
+            ].map((provider) => (
+              <div
+                key={provider.name}
+                className="flex items-center justify-between p-3 bg-gray-50 dark:bg-zinc-800 rounded-lg"
+              >
+                <div>
+                  <p className="text-sm font-medium text-gray-900 dark:text-white">
+                    {provider.name}
+                  </p>
+                  <p className="text-xs text-gray-600 dark:text-gray-400">
+                    {provider.requests} requests
+                  </p>
+                </div>
+                <span
+                  className={`px-2 py-1 text-xs font-medium rounded-full ${
+                    provider.status === 'Connected'
+                      ? 'text-green-700 dark:text-green-400 bg-green-100 dark:bg-green-900'
+                      : 'text-blue-700 dark:text-blue-400 bg-blue-100 dark:bg-blue-900'
+                  }`}
+                >
+                  {provider.status}
+                </span>
+              </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">
+          Recent AI Requests
+        </h2>
+        <p className="text-gray-600 dark:text-gray-400">
+          Recent AI requests will be displayed here.
+        </p>
+      </div>
+    </div>
+  )
+}

keep-notes/app/(main)/admin/layout.tsx

@@ -0,0 +1,23 @@
+import { AdminSidebar } from '@/components/admin-sidebar'
+import { AdminContentArea } from '@/components/admin-content-area'
+import { auth } from '@/auth'
+import { redirect } from 'next/navigation'
+
+export default async function AdminLayout({
+  children,
+}: {
+  children: React.ReactNode
+}) {
+  const session = await auth()
+
+  if ((session?.user as any)?.role !== 'ADMIN') {
+    redirect('/')
+  }
+
+  return (
+    <div className="flex min-h-screen bg-gray-50 dark:bg-zinc-950">
+      <AdminSidebar />
+      <AdminContentArea>{children}</AdminContentArea>
+    </div>
+  )
+}

keep-notes/app/(main)/admin/page.tsx

@@ -1,39 +1,58 @@
 import { getUsers } from '@/app/actions/admin'
-import { UserList } from './user-list'
-import { CreateUserDialog } from './create-user-dialog'
-import { auth } from '@/auth'
-import { redirect } from 'next/navigation'
-import Link from 'next/link'
-import { Button } from '@/components/ui/button'
-import { Settings } from 'lucide-react'
-import { AdminPageHeader, SettingsButton } from '@/components/admin-page-header'
+import { AdminMetrics } from '@/components/admin-metrics'
+import { Users, Activity, Database, Zap } from 'lucide-react'
 
 export default async function AdminPage() {
-  const session = await auth()
-
-  if ((session?.user as any)?.role !== 'ADMIN') {
-    redirect('/')
-  }
-
   const users = await getUsers()
 
+  // Mock metrics data - in a real app, these would come from analytics
+  const metrics = [
+    {
+      title: 'Total Users',
+      value: users.length,
+      trend: { value: 12, isPositive: true },
+      icon: <Users className="h-5 w-5 text-blue-600 dark:text-blue-400" />,
+    },
+    {
+      title: 'Active Sessions',
+      value: '24',
+      trend: { value: 8, isPositive: true },
+      icon: <Activity className="h-5 w-5 text-green-600 dark:text-green-400" />,
+    },
+    {
+      title: 'Total Notes',
+      value: '1,234',
+      trend: { value: 24, isPositive: true },
+      icon: <Database className="h-5 w-5 text-purple-600 dark:text-purple-400" />,
+    },
+    {
+      title: 'AI Requests',
+      value: '856',
+      trend: { value: 5, isPositive: false },
+      icon: <Zap className="h-5 w-5 text-yellow-600 dark:text-yellow-400" />,
+    },
+  ]
+
   return (
-    <div className="container mx-auto py-10 px-4">
-      <div className="flex justify-between items-center mb-8">
-        <AdminPageHeader />
-        <div className="flex gap-2">
-          <Link href="/admin/settings">
-            <Button variant="outline">
-              <Settings className="mr-2 h-4 w-4" />
-              <SettingsButton />
-            </Button>
-          </Link>
-          <CreateUserDialog />
-        </div>
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+          Dashboard
+        </h1>
+        <p className="text-gray-600 dark:text-gray-400 mt-1">
+          Overview of your application metrics
+        </p>
       </div>
 
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800">
-        <UserList initialUsers={users} />
+      <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">
+        <h2 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">
+          Recent Activity
+        </h2>
+        <p className="text-gray-600 dark:text-gray-400">
+          Recent activity will be displayed here.
+        </p>
       </div>
     </div>
   )

keep-notes/app/(main)/admin/settings/page.tsx

@@ -1,21 +1,23 @@
-import { auth } from '@/auth'
-import { redirect } from 'next/navigation'
 import { getSystemConfig } from '@/app/actions/admin-settings'
 import { AdminSettingsForm } from './admin-settings-form'
 
 export default async function AdminSettingsPage() {
-  const session = await auth()
-  
-  if ((session?.user as any)?.role !== 'ADMIN') {
-    redirect('/')
-  }
-
   const config = await getSystemConfig()
 
   return (
-    <div className="container max-w-4xl mx-auto py-10 px-4">
-      <h1 className="text-3xl font-bold mb-8">System Configuration</h1>
-      <AdminSettingsForm config={config} />
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+          Settings
+        </h1>
+        <p className="text-gray-600 dark:text-gray-400 mt-1">
+          Configure application-wide settings
+        </p>
+      </div>
+
+      <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>
     </div>
   )
 }

keep-notes/app/(main)/admin/users/page.tsx

@@ -0,0 +1,29 @@
+import { getUsers } from '@/app/actions/admin'
+import { CreateUserDialog } from '../create-user-dialog'
+import { UserList } from '../user-list'
+import { Plus } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+
+export default async function AdminUsersPage() {
+  const users = await getUsers()
+
+  return (
+    <div className="space-y-6">
+      <div className="flex justify-between items-center">
+        <div>
+          <h1 className="text-3xl font-bold text-gray-900 dark:text-white">
+            Users
+          </h1>
+          <p className="text-gray-600 dark:text-gray-400 mt-1">
+            Manage application users and permissions
+          </p>
+        </div>
+        <CreateUserDialog />
+      </div>
+
+      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800">
+        <UserList initialUsers={users} />
+      </div>
+    </div>
+  )
+}