feat: 规则批量删除与多选操作

后端新增 DELETE /rule/batch，按 userId 校验规则归属，先清理标签关联再批量删除并返回实际删除数；前端规则管理表格增加多选列与批量删除按钮，补充三语文案；同步更新 README 中 AI 渠道推荐与图片记账说明。

frontend/src/api/rule.ts

@@ -73,6 +73,11 @@ export function deleteRule(id: number) {
   return request.delete(`/rule/${id}`)
 }
 
+/** 批量删除规则，返回实际删除数量 */
+export function batchDeleteRules(ids: number[]) {
+  return request.delete('/rule/batch', { data: { ids } })
+}
+
 /** 启用/停用指定规则 */
 export function toggleRuleEnabled(id: number, enabled: boolean) {
   return request.put(`/rule/${id}/enabled`, { enabled })

frontend/src/locales/messages.ts

@@ -546,6 +546,10 @@ export default {
     status: { zh: '启用状态', en: 'Status', ja: '有効状態' },
     statusOn: { zh: '已启用', en: 'Enabled', ja: '有効' },
     statusOff: { zh: '已停用', en: 'Disabled', ja: '無効' },
+    batchDelete: { zh: '批量删除', en: 'Batch Delete', ja: '一括削除' },
+    batchDeleteNone: { zh: '请先选择要删除的规则', en: 'Please select rules to delete', ja: '削除するルールを選択してください' },
+    batchDeleteConfirm: { zh: '确定删除选中的 {count} 条规则吗？', en: 'Delete the {count} selected rule(s)?', ja: '選択した {count} 件のルールを削除しますか？' },
+    batchDeleted: { zh: '已删除 {count} 条规则', en: 'Deleted {count} rule(s)', ja: '{count} 件のルールを削除しました' },
   },
 
   // 账单导入

frontend/src/views/RuleManage.vue

@@ -7,7 +7,7 @@ import {
   NInput, NInputNumber, NSelect, NSwitch, NTag, NText, NCard,
 } from 'naive-ui'
 import type { DataTableColumns } from 'naive-ui'
-import { getRulePage, createRule, updateRule, deleteRule, toggleRuleEnabled } from '../api/rule'
+import { getRulePage, createRule, updateRule, deleteRule, batchDeleteRules, toggleRuleEnabled } from '../api/rule'
 import type { RuleItem } from '../api/rule'
 import { getCategoryList } from '../api/category'
 import { getTagList } from '../api/tag'
@@ -52,6 +52,7 @@ const total = ref(0)
 const searchKeyword = ref('')
 const filterEnabled = ref<string | null>(null) // 'ON' | 'OFF' | null
 const filterType = ref<string | null>(null)
+const checkedRuleIds = ref<number[]>([]) // 表格多选选中的规则ID（用于批量删除）
 
 /** AI 规则建议行（带本地 key 供表格选择使用） */
 type AiRuleRow = AiRuleSuggestion & { key: number }
@@ -162,6 +163,8 @@ function conditionTags(row: RuleItem) {
 
 /** 创建表格列配置 */
 const columns = computed<DataTableColumns<RuleItem>>(() => [
+  // 多选列：用于批量操作（如批量删除）
+  { type: 'selection' },
   {
     title: t('common.name'),
     key: 'name',
@@ -713,6 +716,31 @@ function handleDelete(id: number) {
   })
 }
 
+/** 批量删除选中的规则：确认后调用接口并刷新列表 */
+function handleBatchDelete() {
+  const count = checkedRuleIds.value.length
+  if (count === 0) {
+    message.warning(t('rule.batchDeleteNone'))
+    return
+  }
+  dialog.warning({
+    title: t('common.confirmDelete'),
+    content: t('rule.batchDeleteConfirm', { count }),
+    positiveText: t('common.delete'),
+    negativeText: t('common.cancel'),
+    onPositiveClick: async () => {
+      try {
+        const res: any = await batchDeleteRules(checkedRuleIds.value)
+        message.success(t('rule.batchDeleted', { count: res.data }))
+        checkedRuleIds.value = []
+        await fetchData()
+      } catch (e: any) {
+        message.error(e.message || t('common.deleteFailed'))
+      }
+    },
+  })
+}
+
 // 收支类型变化时，若已选分类类型不匹配则清空，避免保存非法组合
 watch(() => form.value.type, (type) => {
   if (form.value.categoryId && type) {
@@ -739,6 +767,9 @@ onMounted(() => {
       <h2 style="margin: 0;">{{ t('rule.title') }}</h2>
       <NSpace>
         <NButton v-if="aiEnabled" @click="handleAiRuleOpen">{{ t('ai.rule.entry') }}</NButton>
+        <NButton type="error" :disabled="checkedRuleIds.length === 0" @click="handleBatchDelete">
+          {{ t('rule.batchDelete') }}
+        </NButton>
         <NButton type="primary" @click="handleAdd">{{ t('rule.add') }}</NButton>
       </NSpace>
     </NSpace>
@@ -773,11 +804,13 @@ onMounted(() => {
     </NCard>
 
     <NDataTable
+      v-model:checked-row-keys="checkedRuleIds"
       remote
       :columns="columns"
       :data="rules"
       :loading="loading"
       :bordered="false"
+      :row-key="(row: RuleItem) => row.id"
       :pagination="pagination"
       @update:page="handlePageChange"
       @update:page-size="handlePageSizeChange"