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)/settings/profile/page.tsx

@@ -23,29 +23,25 @@ export default async function ProfilePage() {
     redirect('/login')
   }
 
-  // Get user AI settings for language preference and recent notes setting
+  // Get user AI settings
   let userAISettings = { preferredLanguage: 'auto', showRecentNotes: false }
   try {
-    const result = await prisma.$queryRaw<Array<{ preferredLanguage: string | null; showRecentNotes: number | null }>>`
-      SELECT preferredLanguage, showRecentNotes FROM UserAISettings WHERE userId = ${session.user.id}
-    `
-    if (result && result[0]) {
-      // Handle NULL values - if showRecentNotes is NULL, default to false
-      const showRecentNotesValue = result[0].showRecentNotes !== null && result[0].showRecentNotes !== undefined
-        ? result[0].showRecentNotes === 1
-        : false
-      
+    const aiSettings = await prisma.userAISettings.findUnique({
+      where: { userId: session.user.id }
+    })
+
+    if (aiSettings) {
       userAISettings = {
-        preferredLanguage: result[0].preferredLanguage || 'auto',
-        showRecentNotes: showRecentNotesValue
+        preferredLanguage: aiSettings.preferredLanguage || 'auto',
+        showRecentNotes: aiSettings.showRecentNotes ?? false
       }
     }
   } catch (error) {
-    // Record doesn't exist, use defaults
+    console.error('Error fetching AI settings:', error)
   }
 
   return (
-    <div className="container max-w-2xl mx-auto py-10 px-4">
+    <div className="max-w-2xl">
       <ProfilePageHeader />
       <ProfileForm user={user} userAISettings={userAISettings} />