M6 1908b: foreground reminder delivery + recurrence/snooze UI (frontend)

Completes 1908 without Web Push. While the app is open, due reminders now
actually surface; recurring reminders + snooze/done are manageable.

- reminders store (singleton): polls /api/notes/reminders every 45s while
  the app is open; each due reminder fires ONCE as a toast (with an "Open"
  action) and, if the user opts in, a page-context OS Notification — no
  service worker, no PWA. Silently primes a stale backlog on first load;
  only announces recently-due ones. AppShell starts/stops it.
- Editor reminder section: a Repeat picker (Does not repeat / Daily /
  Weekly / Monthly / Yearly) + Done (advances a recurring reminder / clears
  a one-off) + Snooze 1h/1d, shown when a reminder is set.
- RemindersView rebuilt as a chronological list: per row a due time +
  recurrence badge + Done / 1h / 1d, click to open; plus an "Enable
  notifications" opt-in and a note that background alerts come with native.
- Note type gains `recurrence`; notes store setRecurrence /
  completeReminder / snoozeReminder.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FRgehjoz7Yv8LkUfADxACm

frontend/src/components/NoteEditor.vue

@@ -68,6 +68,7 @@ const draftNote = computed<Note>(() => ({
   archived: false,
   trashed: false,
   remind_at: null,
+  recurrence: null,
   labels: labelList.value,
   items: [],
   attachments: [],
@@ -377,6 +378,17 @@ async function onReminderChange(e: Event) {
   if (!id) return;
   await notes.setReminder(id, fromLocalInput((e.target as HTMLInputElement).value));
 }
+async function onRecurrenceChange(e: Event) {
+  const id = await ensureDraft();
+  if (!id) return;
+  await notes.setRecurrence(id, (e.target as HTMLSelectElement).value || null);
+}
+async function completeReminder() {
+  if (noteId.value) await notes.completeReminder(noteId.value);
+}
+async function snoozeReminder(minutes: number) {
+  if (noteId.value) await notes.snoozeReminder(noteId.value, minutes);
+}
 
 // ---- labels ----
 async function onLabelsChange(next: NoteLabel[]) {
@@ -755,6 +767,34 @@ defineExpose({ open });
           </button>
         </div>
 
+        <div v-if="richEnabled && liveNote.remind_at" class="flex flex-wrap items-center gap-2 pl-6 text-xs">
+          <label class="text-neutral-400">Repeat</label>
+          <select
+            :value="liveNote.recurrence ?? ''"
+            class="rounded-md border border-neutral-300 bg-white px-2 py-1 text-xs text-neutral-700 outline-none focus-visible:ring-2 focus-visible:ring-brand dark:border-neutral-700 dark:bg-neutral-800 dark:text-neutral-200"
+            @change="onRecurrenceChange"
+          >
+            <option value="">Does not repeat</option>
+            <option value="daily">Daily</option>
+            <option value="weekly">Weekly</option>
+            <option value="monthly">Monthly</option>
+            <option value="yearly">Yearly</option>
+          </select>
+          <button
+            type="button"
+            class="rounded-md border border-neutral-300 px-2 py-1 text-neutral-600 hover:bg-neutral-100 dark:border-neutral-700 dark:text-neutral-300 dark:hover:bg-neutral-800"
+            @click="completeReminder"
+          >
+            Done
+          </button>
+          <button type="button" class="text-neutral-400 hover:text-neutral-700 dark:hover:text-neutral-200" @click="snoozeReminder(60)">
+            Snooze 1h
+          </button>
+          <button type="button" class="text-neutral-400 hover:text-neutral-700 dark:hover:text-neutral-200" @click="snoozeReminder(1440)">
+            1d
+          </button>
+        </div>
+
         <div
           v-if="!inline && !isCreate && (outgoingLinks.length || backlinks.length)"
           class="flex flex-col gap-2 border-t border-neutral-100 pt-2 dark:border-neutral-800"