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/notes.ts

@@ -385,9 +385,9 @@ export async function createNote(data: {
   reminder?: Date | null
   isMarkdown?: boolean
   size?: 'small' | 'medium' | 'large'
-  sharedWith?: string[]
   autoGenerated?: boolean
   notebookId?: string | undefined // Assign note to a notebook if provided
+  skipRevalidation?: boolean // Option to prevent full page refresh for smooth optimistic UI updates
 }) {
   const session = await auth();
   if (!session?.user?.id) throw new Error('Unauthorized');
@@ -421,8 +421,10 @@ export async function createNote(data: {
       await syncLabels(session.user.id, data.labels, data.notebookId ?? null)
     }
 
-    // Revalidate main page (handles both inbox and notebook views via query params)
-    revalidatePath('/')
+    if (!data.skipRevalidation) {
+      // Revalidate main page (handles both inbox and notebook views via query params)
+      revalidatePath('/')
+    }
 
     // Fire-and-forget: run AI operations in background without blocking the response
     const userId = session.user.id
@@ -470,7 +472,9 @@ export async function createNote(data: {
                 data: { labels: JSON.stringify(appliedLabels) }
               })
               await syncLabels(userId, appliedLabels, notebookId ?? null)
-              revalidatePath('/')
+              if (!data.skipRevalidation) {
+                revalidatePath('/')
+              }
             }
           }
         } catch (error) {
@@ -503,7 +507,7 @@ export async function updateNote(id: string, data: {
   size?: 'small' | 'medium' | 'large'
   autoGenerated?: boolean | null
   notebookId?: string | null
-}) {
+}, options?: { skipContentTimestamp?: boolean; skipRevalidation?: boolean }) {
   const session = await auth();
   if (!session?.user?.id) throw new Error('Unauthorized');
 
@@ -556,9 +560,10 @@ export async function updateNote(id: string, data: {
 
     // Only update contentUpdatedAt for actual content changes, NOT for property changes
     // (size, color, isPinned, isArchived are properties, not content)
+    // skipContentTimestamp=true is used by the inline editor to avoid bumping "Récent" on every auto-save
     const contentFields = ['title', 'content', 'checkItems', 'images', 'links']
     const isContentChange = contentFields.some(field => field in data)
-    if (isContentChange) {
+    if (isContentChange && !options?.skipContentTimestamp) {
       updateData.contentUpdatedAt = new Date()
     }
 
@@ -582,7 +587,7 @@ export async function updateNote(id: string, data: {
     const structuralFields = ['isPinned', 'isArchived', 'labels', 'notebookId']
     const isStructuralChange = structuralFields.some(field => field in data)
 
-    if (isStructuralChange) {
+    if (isStructuralChange && !options?.skipRevalidation) {
       revalidatePath('/')
       revalidatePath(`/note/${id}`)