feat: Enhance SplitPanelLayoutComponent with improved filtering and modal handling

- Updated search conditions to use an object structure with an "equals" operator for better filtering logic.
- Added validation to ensure an item is selected in the left panel before opening the modal, providing user feedback through a toast notification.
- Extracted foreign key data from the selected left item for improved data handling when opening the modal.
- Cleaned up the code by removing unnecessary comments and consolidating logic for clarity and maintainability.

backend-node/src/routes/processWorkStandardRoutes.ts

@@ -3,10 +3,13 @@
  */
 
 import express from "express";
+import { authenticateToken } from "../middleware/authMiddleware";
 import * as ctrl from "../controllers/processWorkStandardController";
 
 const router = express.Router();
 
+router.use(authenticateToken);
+
 // 품목/라우팅/공정 조회 (좌측 트리)
 router.get("/items", ctrl.getItemsWithRouting);
 router.get("/items/:itemCode/routings", ctrl.getRoutingsWithProcesses);