feat: 实现供水运营专题大屏BI可视化

- 新增OperationDashboard.vue全屏大屏组件
- 添加6个核心KPI指标卡片: 进水总量/出水总量/产销差率/营收额/平均水质/报警次数
- 实现6个ECharts图表: 供水趋势/水质分布/报警统计/管网空间/设备状态/营收分析
- 创建静态HTML版本operation-dashboard.html，使用CDN加载Vue3/ECharts/Element Plus
- 更新路由配置，添加/operation路径支持
- 修复nextTick导入问题，优化build脚本

🚧 开发者: bot_dev1
📝 任务: #38 [BI] 运营仪表盘 + 供水专题大屏

frontend/node_modules/postcss/lib/list.d.ts

@@ -0,0 +1,60 @@
+declare namespace list {
+  type List = {
+    /**
+     * Safely splits comma-separated values (such as those for `transition-*`
+     * and `background` properties).
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.comma('black, linear-gradient(white, black)')
+     *   //=> ['black', 'linear-gradient(white, black)']
+     * }
+     * ```
+     *
+     * @param str Comma-separated values.
+     * @return Split values.
+     */
+    comma(str: string): string[]
+
+    default: List
+
+    /**
+     * Safely splits space-separated values (such as those for `background`,
+     * `border-radius`, and other shorthand properties).
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.space('1px calc(10% + 1px)') //=> ['1px', 'calc(10% + 1px)']
+     * }
+     * ```
+     *
+     * @param str Space-separated values.
+     * @return Split values.
+     */
+    space(str: string): string[]
+
+    /**
+     * Safely splits values.
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.split('1px calc(10% + 1px)', [' ', '\n', '\t']) //=> ['1px', 'calc(10% + 1px)']
+     * }
+     * ```
+     *
+     * @param string separated values.
+     * @param separators array of separators.
+     * @param last boolean indicator.
+     * @return Split values.
+     */
+    split(
+      string: string,
+      separators: readonly string[],
+      last: boolean
+    ): string[]
+  }
+}
+
+declare let list: list.List
+
+export = list