fix: preserve newer tender note drafts after delayed saves

src/services/noteDrafts.js

@@ -0,0 +1,12 @@
+// Draft objects identify the exact edit submitted; equal text can still be a new edit.
+export function editNoteDraft(state, owner, key, text) {
+  if (state.owner !== owner) return state;
+  return { ...state, drafts: { ...state.drafts, [key]: { text } } };
+}
+
+export function acknowledgeNoteDraft(state, owner, key, submitted) {
+  if (state.owner !== owner || !submitted || state.drafts[key] !== submitted) return state;
+  const drafts = { ...state.drafts };
+  delete drafts[key];
+  return { ...state, drafts };
+}