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/element-plus/es/hooks/use-namespace/index.mjs

@@ -0,0 +1,63 @@
+import { computed, getCurrentInstance, inject, ref, unref } from "vue";
+//#region ../../packages/hooks/use-namespace/index.ts
+const defaultNamespace = "el";
+const statePrefix = "is-";
+const _bem = (namespace, block, blockSuffix, element, modifier) => {
+	let cls = `${namespace}-${block}`;
+	if (blockSuffix) cls += `-${blockSuffix}`;
+	if (element) cls += `__${element}`;
+	if (modifier) cls += `--${modifier}`;
+	return cls;
+};
+const namespaceContextKey = Symbol("namespaceContextKey");
+const useGetDerivedNamespace = (namespaceOverrides) => {
+	const derivedNamespace = namespaceOverrides || (getCurrentInstance() ? inject(namespaceContextKey, ref("el")) : ref("el"));
+	return computed(() => {
+		return unref(derivedNamespace) || "el";
+	});
+};
+const useNamespace = (block, namespaceOverrides) => {
+	const namespace = useGetDerivedNamespace(namespaceOverrides);
+	const b = (blockSuffix = "") => _bem(namespace.value, block, blockSuffix, "", "");
+	const e = (element) => element ? _bem(namespace.value, block, "", element, "") : "";
+	const m = (modifier) => modifier ? _bem(namespace.value, block, "", "", modifier) : "";
+	const be = (blockSuffix, element) => blockSuffix && element ? _bem(namespace.value, block, blockSuffix, element, "") : "";
+	const em = (element, modifier) => element && modifier ? _bem(namespace.value, block, "", element, modifier) : "";
+	const bm = (blockSuffix, modifier) => blockSuffix && modifier ? _bem(namespace.value, block, blockSuffix, "", modifier) : "";
+	const bem = (blockSuffix, element, modifier) => blockSuffix && element && modifier ? _bem(namespace.value, block, blockSuffix, element, modifier) : "";
+	const is = (name, ...args) => {
+		const state = args.length >= 1 ? args[0] : true;
+		return name && state ? `${statePrefix}${name}` : "";
+	};
+	const cssVar = (object) => {
+		const styles = {};
+		for (const key in object) if (object[key]) styles[`--${namespace.value}-${key}`] = object[key];
+		return styles;
+	};
+	const cssVarBlock = (object) => {
+		const styles = {};
+		for (const key in object) if (object[key]) styles[`--${namespace.value}-${block}-${key}`] = object[key];
+		return styles;
+	};
+	const cssVarName = (name) => `--${namespace.value}-${name}`;
+	const cssVarBlockName = (name) => `--${namespace.value}-${block}-${name}`;
+	return {
+		namespace,
+		b,
+		e,
+		m,
+		be,
+		em,
+		bm,
+		bem,
+		is,
+		cssVar,
+		cssVarName,
+		cssVarBlock,
+		cssVarBlockName
+	};
+};
+//#endregion
+export { defaultNamespace, namespaceContextKey, useGetDerivedNamespace, useNamespace };
+
+//# sourceMappingURL=index.mjs.map