feat: note history modal with restore, diff comparison, and dynamic UI updates

- Complete rewrite of note-history-modal: version list with inline restore/delete,
  split diff view with synced scrolling, rich preview for markdown/richtext/checklist
- Fix restore not updating editor: use key={id-updatedAt} on NoteInlineEditor to
  force remount on restore, and add sync useEffect to reset local state on prop changes
- Add sync useEffect in NoteEditor for external note updates
- Add historyEnabled to NOTE_LIST_SELECT (no more 'Activer' on every modal open)
- Replace browser confirm() with shadcn AlertDialog for delete confirmation
- Add i18n keys: currentVersion, compareVersions, diffTitle, diffSelectHint, deleteVersionDesc
- Install diff + @types/diff for visual line diffing
- Fix MasonryGrid render-phase sync to preserve local sizes
- Update notes-tabs-view merge logic for restored note propagation
- Remove debug console.log from restoreNoteVersion

memento-note/locales/en.json

@@ -167,7 +167,8 @@
     "versionSaved": "Version saved",
     "deleteVersion": "Delete this version",
     "versionDeleted": "Version deleted",
-    "deleteVersionConfirm": "Delete this version permanently?",
+    "deleteVersionConfirm": "Delete this version?",
+    "deleteVersionDesc": "This action cannot be undone. The version will be permanently deleted from the history.",
     "historyMode": "History mode",
     "historyModeManual": "Manual (commit button)",
     "historyModeAuto": "Automatic (smart)",
@@ -183,6 +184,10 @@
     "enableHistory": "Enable history",
     "historyEmpty": "No versions available",
     "historySelectVersion": "Select a version to preview its content",
+    "currentVersion": "current",
+    "compareVersions": "Compare",
+    "diffTitle": "Comparison",
+    "diffSelectHint": "Click on 2 versions in the list to compare them",
     "sortBy": "Sort by",
     "sortDateDesc": "Date (newest)",
     "sortDateAsc": "Date (oldest)",