fix:휴일 년도별 삭제 POST 방식으로 변경

- DELETE /year/{year} → POST /destroy-year 변경
- JavaScript fetch도 POST + JSON body 방식으로 변경

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

resources/views/system/holidays/index.blade.php

@@ -183,11 +183,13 @@ function HolidayManagement() {
     const handleDeleteYear = async () => {
         if (!confirm(`${selectedYear}년도의 모든 휴일(${totalHolidays}건)을 삭제하시겠습니까?\n\n이 작업은 되돌릴 수 없습니다.`)) return;
         try {
-            const url = `/system/holidays/year/${selectedYear}`;
-            console.log('[DEBUG] Delete year URL:', url, 'selectedYear:', selectedYear);
-            const res = await fetch(url, {
-                method: 'DELETE',
-                headers: { 'X-CSRF-TOKEN': csrfToken },
+            const res = await fetch('/system/holidays/destroy-year', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'X-CSRF-TOKEN': csrfToken,
+                },
+                body: JSON.stringify({ year: selectedYear }),
             });
             const data = await res.json();
             if (res.ok) {

routes/web.php

@@ -399,7 +399,7 @@
         Route::get('/list', [HolidayController::class, 'list'])->name('list');
         Route::post('/', [HolidayController::class, 'store'])->name('store');
         Route::post('/bulk', [HolidayController::class, 'bulkStore'])->name('bulk');
-        Route::delete('/year/{year}', [HolidayController::class, 'destroyByYear'])->name('destroy-year');
+        Route::post('/destroy-year', [HolidayController::class, 'destroyByYear'])->name('destroy-year');
         Route::put('/{id}', [HolidayController::class, 'update'])->name('update');
         Route::delete('/{id}', [HolidayController::class, 'destroy'])->name('destroy');
     });