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/no-work-result.d.ts

@@ -0,0 +1,45 @@
+import LazyResult from './lazy-result.js'
+import { SourceMap } from './postcss.js'
+import Processor from './processor.js'
+import Result, { Message, ResultOptions } from './result.js'
+import Root from './root.js'
+import Warning from './warning.js'
+
+declare namespace NoWorkResult {
+  export { NoWorkResult_ as default }
+}
+
+/**
+ * A Promise proxy for the result of PostCSS transformations.
+ * This lazy result instance doesn't parse css unless `NoWorkResult#root` or `Result#root`
+ * are accessed. See the example below for details.
+ * A `NoWork` instance is returned by `Processor#process` ONLY when no plugins defined.
+ *
+ * ```js
+ * const noWorkResult = postcss().process(css) // No plugins are defined.
+ *                                             // CSS is not parsed
+ * let root = noWorkResult.root // now css is parsed because we accessed the root
+ * ```
+ */
+declare class NoWorkResult_ implements LazyResult<Root> {
+  catch: Promise<Result<Root>>['catch']
+  finally: Promise<Result<Root>>['finally']
+  then: Promise<Result<Root>>['then']
+  get content(): string
+  get css(): string
+  get map(): SourceMap
+  get messages(): Message[]
+  get opts(): ResultOptions
+  get processor(): Processor
+  get root(): Root
+  get [Symbol.toStringTag](): string
+  constructor(processor: Processor, css: string, opts: ResultOptions)
+  async(): Promise<Result<Root>>
+  sync(): Result<Root>
+  toString(): string
+  warnings(): Warning[]
+}
+
+declare class NoWorkResult extends NoWorkResult_ {}
+
+export = NoWorkResult