feat: icon-only toolbar, versioning fixes, history modal, PanelRight repositioning

- Toolbar: remove text labels from all icon buttons (AI, Save, Preview, Convert)
  all buttons now icon-only with title tooltip for accessibility
- Toolbar: reposition PanelRight (info panel toggle) to far right after three-dot menu
- Versioning: decouple getNoteHistory/restoreNoteVersion from global userAISettings.noteHistory
  now checks note.historyEnabled directly — unblocks manual per-note history
- Versioning: add 'Sauvegarder cette version' button in Versions tab of info panel
  calls commitNoteHistory with visual feedback (spinner → success state)
- note-document-info-panel: import commitNoteHistory, add isSavingVersion state
- notes.ts: fix double guard that silently blocked all history operations

memento-note/app/actions/notes.ts

@@ -372,16 +372,14 @@ export async function getNoteHistory(noteId: string, limit = 30) {
   const session = await auth()
   if (!session?.user?.id) return []
 
-  const enabled = await isNoteHistoryEnabledForUser(session.user.id)
-  if (!enabled) return []
-
   const clampedLimit = Math.min(Math.max(limit, 1), 100)
 
   const note = await prisma.note.findFirst({
     where: { id: noteId, userId: session.user.id },
-    select: { id: true },
+    select: { id: true, historyEnabled: true },
   })
-  if (!note) return []
+  // History not found or not enabled on this note
+  if (!note || !note.historyEnabled) return []
 
   const entries = await prisma.noteHistory.findMany({
     where: { noteId: note.id, userId: session.user.id },
@@ -396,13 +394,10 @@ export async function restoreNoteVersion(noteId: string, historyEntryId: string)
   const session = await auth()
   if (!session?.user?.id) throw new Error('Unauthorized')
 
-  const enabled = await isNoteHistoryEnabledForUser(session.user.id)
-  if (!enabled) throw new Error('History is disabled')
-
   const [note, historyEntry] = await Promise.all([
     prisma.note.findFirst({
       where: { id: noteId, userId: session.user.id },
-      select: { id: true, notebookId: true },
+      select: { id: true, notebookId: true, historyEnabled: true },
     }),
     prisma.noteHistory.findFirst({
       where: {
@@ -413,9 +408,8 @@ export async function restoreNoteVersion(noteId: string, historyEntryId: string)
     }),
   ])
 
-  if (!note || !historyEntry) {
-    throw new Error('History entry not found')
-  }
+  if (!note || !note.historyEnabled) throw new Error('History is disabled for this note')
+  if (!historyEntry) throw new Error('History entry not found')
 
   const userId = session.user.id
 
@@ -861,10 +855,18 @@ export async function updateNote(id: string, data: {
       updateData.contentUpdatedAt = new Date()
     }
 
-    const note = await prisma.note.update({
-      where: { id, userId: session.user.id },
-      data: updateData
-    })
+    console.log('[updateNote] Attempting update, id:', id, 'userId:', session.user.id)
+    let note
+    try {
+      note = await prisma.note.update({
+        where: { id, userId: session.user.id },
+        data: updateData
+      })
+      console.log('[updateNote] Succeeded, note id:', note?.id)
+    } catch (dbError: any) {
+      console.error('[updateNote] FAILED:', dbError.code, dbError.message)
+      throw dbError
+    }
 
     // Sync labels (JSON + labelRelations + Label rows)
     const notebookMoved =
@@ -908,9 +910,15 @@ export async function updateNote(id: string, data: {
     const structuralFields = ['isPinned', 'isArchived', 'labels', 'notebookId']
     const isStructuralChange = structuralFields.some(field => field in data)
 
-    if (isStructuralChange && !options?.skipRevalidation) {
-      revalidatePath('/')
+    console.log('[updateNote] Structural check — data fields:', Object.keys(data), '| isStructural:', isStructuralChange)
+
+    if (!options?.skipRevalidation) {
+      // Always revalidate note individual page on content changes so UI reflects saved data
       revalidatePath(`/note/${id}`)
+      revalidatePath('/')
+    }
+
+    if (isStructuralChange) {
       if (data.isArchived !== undefined) {
         revalidatePath('/archive')
       }