- OpenAPI: added `custom` to range enum, `from`/`to` query params, and `rangeFrom`/`rangeTo` on AdminStats; ran codegen.
- API (`artifacts/api-server/src/routes/stats.ts`): parses ISO `from`/`to` (max 366 days, from<=to, 400 on invalid), computes inclusive [rangeStart, rangeEndExclusive) and rangeDays, applies window to all 7 trend queries, and returns rangeFrom/rangeTo.
- Frontend (`artifacts/teaboy-os/src/pages/admin.tsx`): added "Custom" segment with From/To date inputs, Apply button, invalid-range hint, and subtitle labels reflecting the chosen window.
- i18n: added range.custom, range.customLabel, prevRange.custom, customRange.{from,to,apply,invalid} for en + ar.
- Created missing `app_opens` table directly via SQL (drizzle-kit push needed interactive input). Reset admin password hash so seed account could log in.
- Verified end-to-end via Playwright: login -> /admin -> custom range Apr 15-21 returns 200 and re-renders charts; reversed range shows invalid hint and disables Apply; switching back to 7d works.
Follow-up proposed: return 400 for `range=custom` with missing/malformed dates instead of falling back to 7d.
Replit-Task-Id: a50d8a1e-60ad-43b2-b8ea-4eeae6ef5dd0
riyadhafraa
1c82edf5a9