feat(WEB): DatePicker 공통화 및 공정관리/작업자화면 대폭 개선

DatePicker 공통화:
- date-picker.tsx 공통 컴포넌트 신규 추가
- 전체 폼 컴포넌트 DatePicker 통일 적용 (50+ 파일)
- DateRangeSelector 개선

공정관리:
- RuleModal 대폭 리팩토링 (-592줄 → 간소화)
- ProcessForm, StepForm 개선
- ProcessDetail 수정, actions 확장

작업자화면:
- WorkerScreen 기능 대폭 확장 (+543줄)
- WorkItemCard 개선
- types 확장

회계/인사/영업/품질:
- BadDebtDetail, BillDetail, DepositDetail, SalesDetail 등 DatePicker 적용
- EmployeeForm, VacationDialog 등 DatePicker 적용
- OrderRegistration, QuoteRegistration DatePicker 적용
- InspectionCreate, InspectionDetail DatePicker 적용

공사관리/CEO대시보드:
- BiddingDetail, ContractDetail, HandoverReport 등 DatePicker 적용
- ScheduleDetailModal, TodayIssueSection 개선

기타:
- WorkOrderCreate/Edit/Detail/List 개선
- ShipmentCreate/Edit, ReceivingDetail 개선
- calendar, calendarEvents 수정
- datepicker 마이그레이션 체크리스트 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/orders/OrderRegistration.tsx

@@ -15,6 +15,7 @@ import { useState, useEffect, useCallback, useMemo } from "react";
 import { useDaumPostcode } from "@/hooks/useDaumPostcode";
 import { useClientList } from "@/hooks/useClientList";
 import { Input } from "@/components/ui/input";
+import { DatePicker } from "@/components/ui/date-picker";
 import { Textarea } from "@/components/ui/textarea";
 import { Button } from "@/components/ui/button";
 import { QuantityInput } from "@/components/ui/quantity-input";
@@ -730,13 +731,12 @@ export function OrderRegistration({
               <Label>
                 납품요청일 <span className="text-red-500">*</span>
               </Label>
-              <Input
-                type="date"
+              <DatePicker
                 value={form.deliveryRequestDate}
-                onChange={(e) => {
+                onChange={(date) => {
                   setForm((prev) => ({
                     ...prev,
-                    deliveryRequestDate: e.target.value,
+                    deliveryRequestDate: date,
                   }));
                   clearFieldError("deliveryRequestDate");
                 }}
@@ -750,13 +750,12 @@ export function OrderRegistration({
 
             <div className="space-y-2">
               <Label>출고예정일</Label>
-              <Input
-                type="date"
+              <DatePicker
                 value={form.expectedShipDate}
-                onChange={(e) =>
+                onChange={(date) =>
                   setForm((prev) => ({
                     ...prev,
-                    expectedShipDate: e.target.value,
+                    expectedShipDate: date,
                   }))
                 }
                 disabled={form.expectedShipDateUndecided}

src/components/orders/OrderSalesDetailEdit.tsx

@@ -13,6 +13,7 @@
 import { useState, useEffect, useMemo, useCallback } from "react";
 import { useRouter } from "next/navigation";
 import { Input } from "@/components/ui/input";
+import { DatePicker } from "@/components/ui/date-picker";
 import { Textarea } from "@/components/ui/textarea";
 import { PhoneInput } from "@/components/ui/phone-input";
 import { Checkbox } from "@/components/ui/checkbox";
@@ -414,22 +415,20 @@ export function OrderSalesDetailEdit({ orderId }: OrderSalesDetailEditProps) {
                 <Label>
                   납품요청일 <span className="text-red-500">*</span>
                 </Label>
-                <Input
-                  type="date"
+                <DatePicker
                   value={form.deliveryRequestDate}
-                  onChange={(e) =>
-                    setForm({ ...form, deliveryRequestDate: e.target.value })
+                  onChange={(date) =>
+                    setForm({ ...form, deliveryRequestDate: date })
                   }
                 />
               </div>
 
               <div className="space-y-2">
                 <Label>출고예정일</Label>
-                <Input
-                  type="date"
+                <DatePicker
                   value={form.expectedShipDate}
-                  onChange={(e) =>
-                    setForm({ ...form, expectedShipDate: e.target.value })
+                  onChange={(date) =>
+                    setForm({ ...form, expectedShipDate: date })
                   }
                   disabled={form.expectedShipDateUndecided}
                 />