feat(status): built-in and custom status presets

The Status Message field required typing every status from scratch. Add
a one-click preset row:

- Built-in "Quick statuses" spanning gaming, social, life and work
  (Gaming, In a party, Ranked grind, AFK, Watching, In a meeting,
  Working remotely, Lunch, On vacation, Out sick...), each carrying a
  suggested auto-clear so a click sets the message and the timer at once.
- Custom presets: save the current status as a reusable preset, stored
  in io.lotus.status_presets account data (synced across devices via the
  shared account-data list store), de-duped by normalized label, capped
  at 20, deletable inline.

The existing save path is factored into a shared applyStatus() used by
the Save button and by preset apply, so server writes, the status
localStorage keys, and the auto-clear expiry bookkeeping stay identical.
Ordering/de-dupe logic is pure in utils/statusPresets.ts (upsertPreset,
normalizeLabel) with unit tests; no change to the presence wire format,
expiry monitor, or presence-mode selector.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/utils/statusPresets.ts

@@ -0,0 +1,58 @@
+// Status presets — quick-pick statuses for the profile Status Message field.
+//
+// A preset's `label` is the full status string (it may include a leading emoji);
+// `clearAfter` is one of the CLEAR_AFTER_OPTIONS values used by ProfileStatus
+// ('0' = never, 'today' = until midnight, or a milliseconds string), so applying
+// a preset feeds the existing getMsFromOption path unchanged.
+
+export type StatusPreset = {
+  id: string;
+  label: string;
+  clearAfter: string;
+};
+
+const HOUR = String(60 * 60 * 1000);
+const MIN30 = String(30 * 60 * 1000);
+const HOUR4 = String(4 * 60 * 60 * 1000);
+const DAY7 = String(7 * 24 * 60 * 60 * 1000);
+
+// Built-in presets span gaming, social, and life — not just work — since Lotus is
+// used mostly for gaming but for all use cases. Order groups related ones together.
+export const BUILT_IN_STATUS_PRESETS: StatusPreset[] = [
+  { id: 'builtin-gaming', label: '🎮 Gaming', clearAfter: HOUR4 },
+  { id: 'builtin-party', label: '🎧 In a party', clearAfter: HOUR4 },
+  { id: 'builtin-ranked', label: '🏆 Ranked grind', clearAfter: HOUR4 },
+  { id: 'builtin-afk', label: '😴 AFK', clearAfter: MIN30 },
+  { id: 'builtin-watching', label: '🍿 Watching', clearAfter: HOUR4 },
+  { id: 'builtin-lunch', label: '🍽️ Lunch', clearAfter: MIN30 },
+  { id: 'builtin-meeting', label: '🗓️ In a meeting', clearAfter: HOUR },
+  { id: 'builtin-remote', label: '🏠 Working remotely', clearAfter: 'today' },
+  { id: 'builtin-focusing', label: '🎯 Focusing', clearAfter: HOUR },
+  { id: 'builtin-vacation', label: '🌴 On vacation', clearAfter: DAY7 },
+  { id: 'builtin-sick', label: '🤒 Out sick', clearAfter: 'today' },
+];
+
+/** Normalize a label for de-dupe: trim + lowercase (emoji preserved). */
+export function normalizeLabel(label: string): string {
+  return label.trim().toLowerCase();
+}
+
+/** Stable-enough unique id for a custom preset (used as a React key). */
+export function makePresetId(): string {
+  return `preset-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;
+}
+
+/**
+ * Insert a preset at the front of the list, de-duped by normalized label so
+ * re-saving the same status moves it to the front instead of duplicating, and
+ * capped at `max`. Pure — returns a new array and never mutates the input.
+ */
+export function upsertPreset(
+  list: StatusPreset[],
+  preset: StatusPreset,
+  max = 20,
+): StatusPreset[] {
+  const key = normalizeLabel(preset.label);
+  const withoutDup = list.filter((p) => normalizeLabel(p.label) !== key);
+  return [preset, ...withoutDup].slice(0, max);
+}