refactor: Remove debug logs and optimize toast animations

- Removed debug console logs from the UPSERT process in the DataService to clean up the code.
- Disabled animations for Sonner toast notifications to enhance performance and user experience.
- Simplified the alert and dialog components by removing unnecessary animation classes, ensuring a smoother transition.
- Updated the SelectedItemsDetailInputComponent to load all related table data in edit mode, improving data management and consistency.

frontend/app/globals.css

@@ -289,6 +289,20 @@ select {
   }
 }
 
+/* ===== Sonner 토스트 애니메이션 완전 제거 ===== */
+[data-sonner-toaster] [data-sonner-toast] {
+  animation: none !important;
+  transition: none !important;
+  opacity: 1 !important;
+  transform: none !important;
+}
+[data-sonner-toaster] [data-sonner-toast][data-mounted="true"] {
+  animation: none !important;
+}
+[data-sonner-toaster] [data-sonner-toast][data-removed="true"] {
+  animation: none !important;
+}
+
 /* ===== Print Styles ===== */
 @media print {
   * {