feat: notes de bord et sauvegarde position calendrier

- bouton crayon sur la fenêtre calendrier (MJ) → dialogue de note
- date impériale + date réelle préremplies
- append au journal configuré (créé auto si inexistant)
- appendJournalNote : labels passés depuis l'ouverture (pas de re-lecture)
- échappement XSS via jQuery .text().html()
- onSave async + await + try/catch
- sauvegarde position calendrier (client scope, debounced 300ms)
- restore position au constructeur
- close() async avec await settings.set
- boutons note et config groupés dans .mgt2-cal-actions (flex row)

styles/npc.css

@@ -1193,6 +1193,14 @@ a.mgt2-world-link:hover {
   flex: 1;
 }
 
+.mgt2-cal-actions {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: 2px;
+  flex: 0 0 auto;
+}
+
 .mgt2-cal-date {
   color: #d8c79a;
   font-size: 0.95em;
@@ -1352,3 +1360,79 @@ a.mgt2-world-link:hover {
 .mgt2-cal-conv-label {
   color: #8a7a5a;
 }
+
+/* Note button on calendar app */
+
+.mgt2-cal-note-btn {
+  flex: 0 0 auto;
+  width: 22px;
+  height: 22px;
+  padding: 0;
+  border: none;
+  background: transparent;
+  color: #8a7a5a;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 0.85em;
+  border-radius: 3px;
+  transition: color 0.15s, background 0.15s;
+}
+
+.mgt2-cal-note-btn:hover {
+  color: #d9b24c;
+  background: rgba(201, 162, 39, 0.15);
+}
+
+/* Note dialog */
+
+.mgt2-note-form {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  padding: 8px;
+  background: #1a1a2e;
+  color: #d8c79a;
+}
+
+.mgt2-note-row {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.mgt2-note-row label {
+  font-size: 0.8em;
+  color: #8a7a5a;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.mgt2-note-value {
+  font-size: 0.9em;
+  color: #d8c79a;
+}
+
+.mgt2-note-row textarea {
+  width: 100%;
+  padding: 6px;
+  border: 1px solid #3a3a4e;
+  border-radius: 3px;
+  background: #252540;
+  color: #d8c79a;
+  font-size: 0.85em;
+  font-family: inherit;
+  resize: vertical;
+}
+
+.mgt2-note-row textarea:focus {
+  outline: none;
+  border-color: #c9a227;
+}
+
+.mgt2-note-actions {
+  display: flex;
+  justify-content: flex-end;
+  margin-top: 4px;
+}