A FREQ=YEARLY event has one static title, so a per-occurrence age is impossible
without heavy per-year exception rows. Replace {age} with {year} — the birth
year (or an anniversary's start year) — which is static and correct on every
occurrence, and shows everywhere (widgets, other apps, exports).
- renderSpecialDateTitle substitutes {year}; drop the age snapshot computation
and the sync `today` parameter.
- Default templates become "{name}'s birthday ({year})" / "…anniversary ({year})".
- Rename the setting to "Show year" (prefs specialDatesShowYear) and remove the
now-unneeded {age} snapshot disclaimer in the template editor.
- Update tests, CHANGELOG and the design-doc note.
lint + unit tests + assembleDebug green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>