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- Fix sidebar: Notes nav no longer active on notebook pages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/notes-main-section.tsx

@@ -25,20 +25,49 @@ interface NotesMainSectionProps {
   onEdit?: (note: Note, readOnly?: boolean) => void
   onSizeChange?: (noteId: string, size: 'small' | 'medium' | 'large') => void
   currentNotebookId?: string | null
+  noteHistoryEnabled?: boolean
+  noteHistoryMode?: 'manual' | 'auto'
+  onOpenHistory?: (note: Note) => void
+  onEnableHistory?: () => Promise<void>
 }
 
-export function NotesMainSection({ notes, viewMode, onEdit, onSizeChange, currentNotebookId }: NotesMainSectionProps) {
+export function NotesMainSection({
+  notes,
+  viewMode,
+  onEdit,
+  onSizeChange,
+  currentNotebookId,
+  noteHistoryEnabled = false,
+  noteHistoryMode = 'manual',
+  onOpenHistory,
+  onEnableHistory,
+}: NotesMainSectionProps) {
   if (viewMode === 'tabs') {
     return (
       <div className="flex min-h-0 flex-1 flex-col" data-testid="notes-grid-tabs-wrap">
-        <NotesTabsView notes={notes} onEdit={onEdit} currentNotebookId={currentNotebookId} />
+        <NotesTabsView
+          notes={notes}
+          onEdit={onEdit}
+          currentNotebookId={currentNotebookId}
+          noteHistoryEnabled={noteHistoryEnabled}
+          noteHistoryMode={noteHistoryMode}
+          onOpenHistory={onOpenHistory}
+          onEnableHistory={onEnableHistory}
+        />
       </div>
     )
   }
 
   return (
     <div data-testid="notes-grid">
-      <MasonryGridLazy notes={notes} onEdit={onEdit} onSizeChange={onSizeChange} />
+      <MasonryGridLazy
+        notes={notes}
+        onEdit={onEdit}
+        onSizeChange={onSizeChange}
+        noteHistoryEnabled={noteHistoryEnabled}
+        noteHistoryMode={noteHistoryMode}
+        onOpenHistory={onOpenHistory}
+      />
     </div>
   )
 }