feat: 记账新增分类筛选(本月实际分类动态选项,与类型/报销筛选叠加,切月重置)

intern-log/src/views/LedgerView.vue

@@ -86,9 +86,16 @@ const summary = computed(() => {
 
 const typeFilter = ref<'all' | TxType>('all')
 const reimbFilter = ref<'all' | 'pending' | 'done'>('all')
+const catFilter = ref<string>('all')
+// 切换月份时重置分类筛选（新月份的分类集合可能不同）
+watch(monthRef, () => { catFilter.value = 'all' })
+const usedCategories = computed(() =>
+  Array.from(new Set(rows.value.map(r => r.category))).sort((a, b) => a.localeCompare(b, 'zh'))
+)
 const filtered = computed(() =>
   sorted.value.filter(r => {
     if (typeFilter.value !== 'all' && r.type !== typeFilter.value) return false
+    if (catFilter.value !== 'all' && r.category !== catFilter.value) return false
     if (reimbFilter.value === 'pending' && !(r.type === 'expense' && r.reimbursable === 1 && r.reimbursed !== 1)) return false
     if (reimbFilter.value === 'done' && !(r.reimbursable === 1 && r.reimbursed === 1)) return false
     return true
@@ -227,6 +234,10 @@ async function confirmDelete() {
         <option value="expense">仅支出</option>
         <option value="income">仅收入</option>
       </select>
+      <select class="select w-filter" v-model="catFilter">
+        <option value="all">全部分类</option>
+        <option v-for="c in usedCategories" :key="c" :value="c">{{ c }}</option>
+      </select>
       <select class="select w-filter" v-model="reimbFilter">
         <option value="all">全部报销</option>
         <option value="pending">待报销</option>