fix(WEB): 폼 컴포넌트 DatePicker 적용 및 코드 정리

- ExpectedExpenseManagement DatePicker 적용 및 간소화
- BoardForm 날짜 필드 개선
- AttendanceInfoDialog, ReasonInfoDialog 코드 정리
- ReceivingDetail 기능 보강
- ShipmentCreate/Edit DatePicker 적용
- VehicleDispatchEdit 수정
- WorkOrderCreate 개선

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

src/components/board/BoardForm/index.tsx

@@ -166,8 +166,8 @@ export function BoardForm({ mode, initialData }: BoardFormProps) {
   }, [boardCode, title, content]);
 
   // ===== 저장 핸들러 =====
-  const handleSubmit = useCallback(async () => {
-    if (!validate()) return;
+  const handleSubmit = useCallback(async (): Promise<{ success: boolean; error?: string }> => {
+    if (!validate()) return { success: false, error: '' };
 
     setIsSubmitting(true);
     try {
@@ -186,20 +186,19 @@ export function BoardForm({ mode, initialData }: BoardFormProps) {
         result = await updatePost(boardCode, initialData.id, postData);
       }
 
-      if (result?.success) {
-        toast.success(mode === 'create' ? '게시글이 등록되었습니다.' : '게시글이 수정되었습니다.');
-        router.push('/ko/board');
-      } else {
-        toast.error(result?.error || '게시글 저장에 실패했습니다.');
+      if (!result?.success) {
+        return { success: false, error: result?.error || '게시글 저장에 실패했습니다.' };
       }
+      return { success: true };
     } catch (error) {
       if (isNextRedirectError(error)) throw error;
       console.error('게시글 저장 오류:', error);
-      toast.error('게시글 저장에 실패했습니다.');
+      const errorMessage = error instanceof Error ? error.message : '게시글 저장에 실패했습니다.';
+      return { success: false, error: errorMessage };
     } finally {
       setIsSubmitting(false);
     }
-  }, [boardCode, title, content, isPinned, mode, initialData, router, validate]);
+  }, [boardCode, title, content, isPinned, mode, initialData, validate]);
 
   // ===== 취소 핸들러 =====
   const handleCancel = useCallback(() => {
@@ -418,9 +417,8 @@ export function BoardForm({ mode, initialData }: BoardFormProps) {
       mode={mode}
       isLoading={isBoardsLoading}
       onCancel={handleCancel}
-      onSubmit={async (_data: Record<string, unknown>) => {
-        await handleSubmit();
-        return { success: true };
+      onSubmit={async () => {
+        return await handleSubmit();
       }}
       renderForm={renderFormContent}
     />