refactor: 优化分类树构建逻辑，简化代码结构

pages/message/common-phrases.vue

@@ -328,49 +328,47 @@ const currentCategories = computed(() => {
 });
 
 const getCategorySortValue = (category) => {
-  return Number.isFinite(Number(category?.sort)) ? Number(category.sort) : 10000;
-};
-
-const sortCategorySiblings = (list) => {
-  return [...list].sort((a, b) => {
-    const sortDiff = getCategorySortValue(a) - getCategorySortValue(b);
-    if (sortDiff !== 0) return sortDiff;
-    return String(a.name || "").localeCompare(String(b.name || ""), "zh-Hans-CN");
-  });
+  return category?.sort >= 0 ? Number(category.sort) : 10000;
 };
 
 const buildCategoryTree = (categories) => {
-  const nodeMap = new Map();
-  const roots = [];
+  if (!Array.isArray(categories)) return [];
 
-  categories.forEach((category) => {
-    nodeMap.set(category.id, { ...category, children: [], childrenIds: [] });
-  });
+  const level3 = categories
+    .filter((item) => item.level === 3)
+    .map((item) => {
+      const children = categories.filter((child) => child.parentId === item.id).map((child) => ({ ...child }));
+      const childrenIds = children.map((child) => child.id);
+      return { ...item, children, childrenIds };
+    });
 
-  nodeMap.forEach((node) => {
-    const parent = node.parentId ? nodeMap.get(node.parentId) : null;
-    if (parent) {
-      parent.children.push(node);
-    } else {
-      roots.push(node);
-    }
-  });
-
-  const normalizeNodes = (nodes) => {
-    return sortCategorySiblings(nodes).map((node) => {
-      const children = normalizeNodes(node.children || []);
-      const childrenIds = [];
+  const level2 = categories
+    .filter((item) => item.level === 2)
+    .map((item) => {
+      const children = level3.filter((child) => child.parentId === item.id).map((child) => ({ ...child }));
+      const childrenIds = children.map((child) => child.id);
       children.forEach((child) => {
         childrenIds.push(child.id);
         if (Array.isArray(child.childrenIds)) {
           childrenIds.push(...child.childrenIds);
         }
       });
-      return { ...node, children, childrenIds };
+      return { ...item, children, childrenIds };
     });
-  };
 
-  return normalizeNodes(roots);
+  return categories
+    .filter((item) => item.level === 1)
+    .map((item) => {
+      const children = level2.filter((child) => child.parentId === item.id);
+      const childrenIds = children.map((child) => child.id);
+      children.forEach((child) => {
+        if (Array.isArray(child.childrenIds) && child.childrenIds.length > 0) {
+          childrenIds.push(...child.childrenIds);
+        }
+      });
+      return { ...item, children, childrenIds };
+    })
+    .sort((a, b) => getCategorySortValue(a) - getCategorySortValue(b));
 };
 
 const flattenCategoryTree = (nodes, visibleOnly = false) => {
@@ -473,7 +471,7 @@ const normalizeCategory = (item, categoryType) => {
   return {
     id: item._id || item.id,
     name,
-    sort: item.sort || 0,
+    sort: item.sort,
     level: item.level || 1,
     parentId: item.parentId || "",
     type: categoryType,