improvement: rtl direction, solar calendar and persian formatting added for persian users.

AGENTS.md

@@ -38,6 +38,8 @@ frontend/src/
 
 **Example thin page:** `app/.../treatment/page.tsx` → imports `TreatmentWorkspace` from `components/ui/treatment/`.
 
+**i18n formatting:** Display dates/times/numbers via `lib/i18n/format.ts` + `useLocale()`. Form dates: **`AppDateInput`** (all locales — same component, masked typing + calendar popup). Appointments strip: **`ScheduleDayPicker`**. Filter `<select>`s: **`FORM_SELECT_CLASS`**; data tables: **`Table`** with logical `text-start`/`text-end` (not `text-left`/`text-right`). Skill: `.cursor/skills/i18n-formatting/SKILL.md`.
+
 **Treatment tab:** Preview and editable form are **separate** until the user clicks **Load into workspace** on a history item. See `.cursor/skills/treatment-workspace/SKILL.md` before changing that flow.
 
 **Treatment lab rules (quick ref):**
@@ -75,6 +77,7 @@ Errors: `AppException` + `ErrorCode` → frontend `getUserFacingError()`. Never
 | `.cursor/skills/lab-notifications/` | Tab badges: LabCaseActivity, tab-counts API, read cursors |
 | `.cursor/skills/frontend-structure/` | Moving components, auditing folder layout |
 | `.cursor/skills/api-errors/` | New backend errors + frontend translations |
+| `.cursor/skills/i18n-formatting/` | Dates, times, numbers, Jalali picker, RTL formatting |
 
 ## Subagents (Task tool)