refactor: implement CategoryService for category data management and update caching logic in prerender and renderer components

prerender.cjs

@@ -19,6 +19,24 @@ global.Blob = class MockBlob {
   }
 };
 
+class CategoryService {
+  constructor() {
+    this.get = this.get.bind(this);
+  }
+
+  getSync(categoryId, language = "de") {
+    const cacheKey = `${categoryId}_${language}`;
+    return null;
+  }
+  
+  async get(categoryId, language = "de") {
+    const cacheKey = `${categoryId}_${language}`;
+    return null;
+  }
+}
+global.window.categoryService = new CategoryService();
+
+
 // Import modules
 const fs = require("fs");
 const path = require("path");
@@ -350,14 +368,14 @@ const renderProductsInParallel = async (allProductsArray, maxWorkers, totalProdu
 
 const renderApp = async (categoryData, socket) => {
   if (categoryData) {
-    global.window.productCache = {
-      categoryTree_209: { categoryTree: categoryData, timestamp: Date.now() },
+    global.window.categoryCache = {
+      "209_de": categoryData,
     };
     // @note Make cache available to components during rendering
-    global.productCache = global.window.productCache;
+    global.categoryCache = global.window.categoryCache;
   } else {
-    global.window.productCache = {};
-    global.productCache = {};
+    global.window.categoryCache = {};
+    global.categoryCache = {};
   }
 
   // Helper to call renderPage with config