- zValidator enforces YYYY-MM-DD regex on start/end (T-02b-01)
- 90-day window cap prevents DoS (T-02b-02)
- innerJoin calendarEvents→calendars→users for color + isShared + ownerUserId
- SQL pre-filter includes hasRrule=true rows regardless of dtstartUtc range
- expandOccurrences() called per row; shared calendar uses #F25C7A rose color
- events.test.ts: added @hono/oidc-auth mock; 4/4 assertions green