feat: smart note history with manual/auto modes, delete entries, i18n fixes

- Add noteHistoryMode setting (manual default / auto) with DB migration
- Manual mode: commit button in editor toolbar creates snapshots on demand
- Auto mode: smart snapshots with 20-char diff threshold + 5min cooldown,
  structural changes (color, pin, archive, labels) bypass cooldown
- Add delete individual history entries from history modal
- Fix sidebar: Notes nav no longer active on notebook pages
- Fix sidebar icon: replace filled Lightbulb with outlined FileText
- Fix title suggestions: change from amber to sky blue color scheme
- Fix hydration mismatch: add suppressHydrationWarning on locale dates
- Complete i18n: add history, sort, and AI chat translations for all 16 languages
- Translate French AI assistant section (40+ keys) from English to French
- Update README with new features and stack info

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

memento-note/components/note-actions.tsx

@@ -17,6 +17,7 @@ import {
   FileText,
   Trash2,
   RotateCcw,
+  History,
 } from "lucide-react"
 import { cn } from "@/lib/utils"
 import { NOTE_COLORS } from "@/lib/types"
@@ -38,6 +39,8 @@ interface NoteActionsProps {
   isTrashView?: boolean
   onRestore?: () => void
   onPermanentDelete?: () => void
+  onOpenHistory?: () => void
+  historyEnabled?: boolean
   className?: string
 }
 
@@ -57,6 +60,8 @@ export function NoteActions({
   isTrashView,
   onRestore,
   onPermanentDelete,
+  onOpenHistory,
+  historyEnabled = false,
   className
 }: NoteActionsProps) {
   const { t } = useLanguage()
@@ -176,6 +181,15 @@ export function NoteActions({
             )}
           </DropdownMenuItem>
 
+          {onOpenHistory && (
+            <DropdownMenuItem onClick={onOpenHistory}>
+              <History className="h-4 w-4 mr-2" />
+              {historyEnabled
+                ? (t('notes.history') || 'Historique')
+                : (t('notes.enableHistory') || "Activer l'historique")}
+            </DropdownMenuItem>
+          )}
+
           {/* Size Selector */}
           {onSizeChange && (
             <>