refactor: enhance date selection logic in DatePicker and update appointment request parameters

app/component/date/datePicker/index.js

@@ -5,6 +5,7 @@ import FirstDatePicker from "./date/FirstDatePicker";
 import SecondDatePicker from "./date/SecondDatePicker";
 import { dateToTimestamp } from "@/helper";
 import moment from "moment-jalaali";
+import "moment-timezone";
 
 function DatePicker({ setDate, disabledDates = [] }) {
   const nextIconDatePickerF = useRef();
@@ -15,6 +16,7 @@ function DatePicker({ setDate, disabledDates = [] }) {
   const [startDate, setStartDate] = useState(null);
   const [endDate, setEndDate] = useState();
   const [loading, setLoading] = useState(true);
+  const [autoSelected, setAutoSelected] = useState(false);
 
   const handleStartDateChange = (date, e) => {
     if (date) {
@@ -59,6 +61,47 @@ function DatePicker({ setDate, disabledDates = [] }) {
     }
   }, [nextIconDatePickerS, disabledDates]);
 
+  // انتخاب خودکار امروز یا نزدیک‌ترین روز قابل انتخاب
+  useEffect(() => {
+    if (!loading && !autoSelected && disabledDates) {
+      const today = moment().tz("Asia/Tehran");
+      const todayTimestamp = moment().tz("Asia/Tehran").startOf("day").unix();
+
+      // بررسی اینکه امروز قابل انتخاب است یا نه
+      const isTodayDisabled = disabledDates.some((ts) =>
+        moment.unix(ts).startOf("day").isSame(today.startOf("day"))
+      );
+
+      if (!isTodayDisabled) {
+        // امروز قابل انتخاب است
+        setStartDate(today);
+        setDate(todayTimestamp);
+        setAutoSelected(true);
+      } else {
+        // پیدا کردن نزدیک‌ترین روز قابل انتخاب
+        let nearestDate = null;
+        let daysToCheck = 30; // بررسی 30 روز آینده
+
+        for (let i = 1; i <= daysToCheck; i++) {
+          const futureDate = moment().tz("Asia/Tehran").add(i, "days");
+          const futureDateTimestamp = futureDate.clone().startOf("day").unix();
+
+          const isFutureDateDisabled = disabledDates.some((ts) =>
+            moment.unix(ts).startOf("day").isSame(futureDate.startOf("day"))
+          );
+
+          if (!isFutureDateDisabled) {
+            nearestDate = futureDate;
+            setStartDate(futureDate);
+            setDate(futureDateTimestamp);
+            setAutoSelected(true);
+            break;
+          }
+        }
+      }
+    }
+  }, [loading, disabledDates, autoSelected, setDate]);
+
   return (
     <div className="datePickerApt flex items-start custom-datepicker justify-evenly w-full">
       <FirstDatePicker