fix: [payables] 전표 삭제 500 에러 수정

- Accept: application/json 헤더 추가 (HTML 응답 방지)
- findOrFail → find + 수동 404 처리 (에러 메시지 개선)
- try-catch 추가로 상세 에러 메시지 반환

app/Http/Controllers/Finance/PayableController.php

@@ -512,15 +512,30 @@ public function journalPayables(Request $request): JsonResponse
      */
     public function deleteJournalEntry(int $id): JsonResponse
     {
-        $tenantId = session('selected_tenant_id', 1);
+        try {
+            $tenantId = session('selected_tenant_id', 1);
 
-        $entry = JournalEntry::where('tenant_id', $tenantId)->findOrFail($id);
+            $entry = JournalEntry::where('tenant_id', $tenantId)->find($id);
 
-        $entry->delete();
+            if (! $entry) {
+                return response()->json([
+                    'success' => false,
+                    'message' => "전표(ID: {$id})를 찾을 수 없습니다. (tenant: {$tenantId})",
+                ], 404);
+            }
 
-        return response()->json([
-            'success' => true,
-            'message' => "전표 {$entry->entry_no}이(가) 삭제되었습니다.",
-        ]);
+            $entryNo = $entry->entry_no;
+            $entry->delete();
+
+            return response()->json([
+                'success' => true,
+                'message' => "전표 {$entryNo}이(가) 삭제되었습니다.",
+            ]);
+        } catch (\Throwable $e) {
+            return response()->json([
+                'success' => false,
+                'message' => '삭제 오류: '.$e->getMessage(),
+            ], 500);
+        }
     }
 }

resources/views/finance/payables.blade.php

@@ -87,7 +87,7 @@ function IntegratedTab({ startDate, endDate, account, vendorSearch }) {
         try {
             const res = await fetch(`/finance/payables/journal-entry/${journalEntryId}`, {
                 method: 'DELETE',
-                headers: { 'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content },
+                headers: { 'X-CSRF-TOKEN': document.querySelector('meta[name="csrf-token"]').content, 'Accept': 'application/json' },
             });
             const json = await res.json();
             if (json.success) {