feat: RTL/i18n, AI translate+undo, no-refresh saves, settings perf

- RTL: force dir=rtl on LabelFilter, NotesViewToggle, LabelManagementDialog
- i18n: add missing keys (notifications, privacy, edit/preview, AI translate/undo)
- Settings pages: convert to Server Components (general, appearance) + loading skeleton
- AI menu: add Translate option (10 languages) + Undo AI button in toolbar
- Fix: saveInline uses REST API instead of Server Action → eliminates all implicit refreshes in list mode
- Fix: NotesTabsView notes sync effect preserves selected note on content changes
- Fix: auto-tag suggestions now filter already-assigned labels
- Fix: color change in card view uses local state (no refresh)
- Fix: nav links use <Link> for prefetching (Settings, Admin)
- Fix: suppress duplicate label suggestions already on note
- Route: add /api/ai/translate endpoint

keep-notes/app/actions/ai-settings.ts

@@ -14,13 +14,54 @@ export type UserAISettingsData = {
   preferredLanguage?: 'auto' | 'en' | 'fr' | 'es' | 'de' | 'fa' | 'it' | 'pt' | 'ru' | 'zh' | 'ja' | 'ko' | 'ar' | 'hi' | 'nl' | 'pl'
   demoMode?: boolean
   showRecentNotes?: boolean
+  notesViewMode?: 'masonry' | 'tabs' | 'list'
   emailNotifications?: boolean
   desktopNotifications?: boolean
   anonymousAnalytics?: boolean
-  theme?: 'light' | 'dark' | 'auto'
   fontSize?: 'small' | 'medium' | 'large'
 }
 
+/** Only fields that exist on `UserAISettings` in Prisma (excludes e.g. `theme`, which lives on `User`). */
+const USER_AI_SETTINGS_PRISMA_KEYS = [
+  'titleSuggestions',
+  'semanticSearch',
+  'paragraphRefactor',
+  'memoryEcho',
+  'memoryEchoFrequency',
+  'aiProvider',
+  'preferredLanguage',
+  'fontSize',
+  'demoMode',
+  'showRecentNotes',
+  'notesViewMode',
+  'emailNotifications',
+  'desktopNotifications',
+  'anonymousAnalytics',
+] as const
+
+type UserAISettingsPrismaKey = (typeof USER_AI_SETTINGS_PRISMA_KEYS)[number]
+
+function pickUserAISettingsForDb(input: UserAISettingsData): Partial<Record<UserAISettingsPrismaKey, unknown>> {
+  const out: Partial<Record<UserAISettingsPrismaKey, unknown>> = {}
+  for (const key of USER_AI_SETTINGS_PRISMA_KEYS) {
+    const v = input[key]
+    if (v !== undefined) {
+      out[key] = v
+    }
+  }
+  if (out.notesViewMode === 'list') {
+    out.notesViewMode = 'tabs'
+  }
+  if (
+    out.notesViewMode != null &&
+    out.notesViewMode !== 'masonry' &&
+    out.notesViewMode !== 'tabs'
+  ) {
+    delete out.notesViewMode
+  }
+  return out
+}
+
 /**
  * Update AI settings for the current user
  */
@@ -35,24 +76,41 @@ export async function updateAISettings(settings: UserAISettingsData) {
   }
 
   try {
+    const data = pickUserAISettingsForDb(settings)
+    if (Object.keys(data).length === 0) {
+      return { success: true }
+    }
+
+    // Valeurs scalaires uniquement (pickUserAISettingsForDb) — cast pour éviter UpdateOperations vs create.
+    const payload = data as Record<string, string | boolean | undefined>
+
     // Upsert settings (create if not exists, update if exists)
-    const result = await prisma.userAISettings.upsert({
+    await prisma.userAISettings.upsert({
       where: { userId: session.user.id },
       create: {
         userId: session.user.id,
-        ...settings
+        ...payload,
       },
-      update: settings
+      update: payload,
     })
 
-
     revalidatePath('/settings/ai', 'page')
+    revalidatePath('/settings/appearance', 'page')
     revalidatePath('/', 'layout')
     updateTag('ai-settings')
 
     return { success: true }
   } catch (error) {
     console.error('Error updating AI settings:', error)
+    const raw = error instanceof Error ? error.message : String(error)
+    const isSchema =
+      /no such column|notesViewMode|Unknown column|does not exist/i.test(raw) ||
+      (typeof raw === 'string' && raw.includes('UserAISettings') && raw.includes('column'))
+    if (isSchema) {
+      throw new Error(
+        'Schéma base de données obsolète : colonne notesViewMode manquante. Dans le dossier keep-notes, exécutez : npx prisma db push (ou appliquez les migrations Prisma).'
+      )
+    }
     throw new Error('Failed to update AI settings')
   }
 }
@@ -81,6 +139,7 @@ const getCachedAISettings = unstable_cache(
           preferredLanguage: 'auto' as const,
           demoMode: false,
           showRecentNotes: false,
+          notesViewMode: 'masonry' as const,
           emailNotifications: false,
           desktopNotifications: false,
           anonymousAnalytics: false,
@@ -89,6 +148,14 @@ const getCachedAISettings = unstable_cache(
         }
       }
 
+      const raw = settings.notesViewMode
+      const viewMode =
+        raw === 'masonry'
+          ? ('masonry' as const)
+          : raw === 'list' || raw === 'tabs'
+            ? ('tabs' as const)
+            : ('masonry' as const)
+
       return {
         titleSuggestions: settings.titleSuggestions,
         semanticSearch: settings.semanticSearch,
@@ -99,6 +166,7 @@ const getCachedAISettings = unstable_cache(
         preferredLanguage: (settings.preferredLanguage || 'auto') as 'auto' | 'en' | 'fr' | 'es' | 'de' | 'fa' | 'it' | 'pt' | 'ru' | 'zh' | 'ja' | 'ko' | 'ar' | 'hi' | 'nl' | 'pl',
         demoMode: settings.demoMode,
         showRecentNotes: settings.showRecentNotes,
+        notesViewMode: viewMode,
         emailNotifications: settings.emailNotifications,
         desktopNotifications: settings.desktopNotifications,
         anonymousAnalytics: settings.anonymousAnalytics,
@@ -118,6 +186,7 @@ const getCachedAISettings = unstable_cache(
         preferredLanguage: 'auto' as const,
         demoMode: false,
         showRecentNotes: false,
+        notesViewMode: 'masonry' as const,
         emailNotifications: false,
         desktopNotifications: false,
         anonymousAnalytics: false,
@@ -150,6 +219,7 @@ export async function getAISettings(userId?: string) {
       preferredLanguage: 'auto' as const,
       demoMode: false,
       showRecentNotes: false,
+      notesViewMode: 'masonry' as const,
       emailNotifications: false,
       desktopNotifications: false,
       anonymousAnalytics: false,