fix: 优化分类列表显示逻辑，简化分类视图计算

Web/src/views/StatisticsView.vue

@@ -102,9 +102,9 @@
           </div>
 
           <!-- 分类列表 -->
-          <div v-if="expenseCategoriesView.length > 0" class="category-list">
+          <div v-if="expenseCategoriesSimpView.length > 0" class="category-list">
             <div 
-              v-for="(category) in expenseCategoriesView" 
+              v-for="(category) in expenseCategoriesSimpView" 
               :key="category.isOther ? 'other' : category.classify"
               class="category-item clickable"
               @click="category.isOther ? (showAllExpense = true) : goToCategoryBills(category.classify, 0)"
@@ -386,13 +386,8 @@ const expenseCategories = ref([])
 const incomeCategories = ref([])
 const noneCategories = ref([])
 
-const expenseCategoriesView = computed(() => {
-  const list = [...expenseCategories.value]
-  const unclassifiedIndex = list.findIndex(c => !c.classify)
-  if (unclassifiedIndex !== -1) {
-    const [unclassified] = list.splice(unclassifiedIndex, 1)
-    list.unshift(unclassified)
-  }
+const expenseCategoriesSimpView = computed(() => {
+  const list = expenseCategoriesView.value
   
   if (showAllExpense.value || list.length <= 7) return list
   
@@ -409,6 +404,17 @@ const expenseCategoriesView = computed(() => {
   return top
 })
 
+const expenseCategoriesView = computed(() => {
+  const list = [...expenseCategories.value]
+  const unclassifiedIndex = list.findIndex(c => !c.classify)
+  if (unclassifiedIndex !== -1) {
+    const [unclassified] = list.splice(unclassifiedIndex, 1)
+    list.unshift(unclassified)
+  }
+  
+  return list
+})
+
 const incomeCategoriesView = computed(() => {
   const list = [...incomeCategories.value]
   const unclassifiedIndex = list.findIndex(c => !c.classify)