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/quotes/QuoteRegistration.tsx

@@ -10,6 +10,7 @@
 
 import { useState, useEffect, useMemo, useCallback } from "react";
 import { Input } from "../ui/input";
+import { DatePicker } from "../ui/date-picker";
 import { Textarea } from "../ui/textarea";
 import { QuantityInput } from "../ui/quantity-input";
 import { CurrencyInput } from "../ui/currency-input";
@@ -671,12 +672,9 @@ export function QuoteRegistration({
         >
           <FormFieldGrid columns={3}>
             <FormField label="등록일" htmlFor="registrationDate" type="custom">
-              <Input
-                id="registrationDate"
-                type="date"
+              <DatePicker
                 value={formData.registrationDate}
                 disabled
-                className="bg-gray-50"
               />
             </FormField>
 
@@ -752,11 +750,9 @@ export function QuoteRegistration({
 
           <FormFieldGrid columns={3}>
             <FormField label="납기일" htmlFor="dueDate" type="custom">
-              <Input
-                id="dueDate"
-                type="date"
+              <DatePicker
                 value={formData.dueDate}
-                onChange={(e) => handleFieldChange("dueDate", e.target.value)}
+                onChange={(date) => handleFieldChange("dueDate", date)}
               />
             </FormField>
             <div className="col-span-2" />

src/components/quotes/QuoteRegistrationV2.tsx

@@ -17,6 +17,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "../ui/card";
 import { Button } from "../ui/button";
 import { Badge } from "../ui/badge";
 import { Input } from "../ui/input";
+import { DatePicker } from "../ui/date-picker";
 import { Textarea } from "../ui/textarea";
 import { PhoneInput } from "../ui/phone-input";
 import {
@@ -754,10 +755,9 @@ export function QuoteRegistrationV2({
               </div>
               <div>
                 <label className="text-sm font-medium text-gray-700">접수일</label>
-                <Input
-                  type="date"
+                <DatePicker
                   value={formData.registrationDate}
-                  onChange={(e) => handleFieldChange("registrationDate", e.target.value)}
+                  onChange={(date) => handleFieldChange("registrationDate", date)}
                   disabled={isViewMode}
                 />
               </div>