fix(datepicker): avoid offscreen calendar placement

src/components/ui/JalaliDatePicker.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from "react"
+import React, { useEffect, useRef, useState } from "react"
 import DatePicker, { DateObject } from "react-multi-date-picker"
 import persian from "react-date-object/calendars/persian"
 import persian_fa from "react-date-object/locales/persian_fa"
@@ -18,6 +18,8 @@ interface JalaliDatePickerProps {
 export default function JalaliDatePicker({ value, onChange, label, disabled, inputClassName = "", placeholder }: JalaliDatePickerProps) {
   const isFa = document.documentElement.dir === 'rtl'
   const [isDark, setIsDark] = useState(document.documentElement.classList.contains('dark'))
+  const containerRef = useRef<HTMLDivElement>(null)
+  const [calendarPosition, setCalendarPosition] = useState("bottom-right")
 
   // Listen for dark mode changes dynamically (optional but good for UX)
   useEffect(() => {
@@ -37,8 +39,19 @@ export default function JalaliDatePicker({ value, onChange, label, disabled, inp
     }
   }
 
+  const updateCalendarPosition = () => {
+    const rect = containerRef.current?.getBoundingClientRect()
+    if (!rect) return
+
+    const estimatedHeight = 340
+    const hasMoreSpaceAbove = rect.top > window.innerHeight - rect.bottom
+    const shouldOpenTop = window.innerHeight - rect.bottom < estimatedHeight && hasMoreSpaceAbove
+    const horizontal = isFa ? "left" : "right"
+    setCalendarPosition(`${shouldOpenTop ? "top" : "bottom"}-${horizontal}`)
+  }
+
   return (
-    <div className="w-full">
+    <div ref={containerRef} className="w-full">
       {label && (
         <label className="text-sm font-medium dark:text-slate-300 mb-1 block">
           {label}
@@ -52,10 +65,11 @@ export default function JalaliDatePicker({ value, onChange, label, disabled, inp
         format="YYYY/MM/DD"
         placeholder={placeholder || "YYYY/MM/DD"}
         onOpenPickNewDate={false}
+        onOpen={updateCalendarPosition}
         inputClass={`w-full rounded-md border border-slate-300 bg-transparent px-3 py-2 text-sm dark:border-slate-700 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed ${inputClassName}`}
         containerClassName="w-full"
         className={isDark ? "bg-dark" : ""}
-        calendarPosition="bottom-right"
+        calendarPosition={calendarPosition}
         fixMainPosition
         disabled={disabled}
       />