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/directives/trap-focus/index.mjs

@@ -0,0 +1,51 @@
+import { obtainAllFocusableElements } from "../../utils/dom/aria.mjs";
+import { EVENT_CODE } from "../../constants/aria.mjs";
+import { getEventCode } from "../../utils/dom/event.mjs";
+import { nextTick } from "vue";
+//#region ../../packages/directives/trap-focus/index.ts
+const FOCUSABLE_CHILDREN = "_trap-focus-children";
+const TRAP_FOCUS_HANDLER = "_trap-focus-handler";
+const FOCUS_STACK = [];
+const FOCUS_HANDLER = (e) => {
+	if (FOCUS_STACK.length === 0) return;
+	const code = getEventCode(e);
+	const focusableElement = FOCUS_STACK[FOCUS_STACK.length - 1][FOCUSABLE_CHILDREN];
+	if (focusableElement.length > 0 && code === EVENT_CODE.tab) {
+		if (focusableElement.length === 1) {
+			e.preventDefault();
+			if (document.activeElement !== focusableElement[0]) focusableElement[0].focus();
+			return;
+		}
+		const goingBackward = e.shiftKey;
+		const isFirst = e.target === focusableElement[0];
+		const isLast = e.target === focusableElement[focusableElement.length - 1];
+		if (isFirst && goingBackward) {
+			e.preventDefault();
+			focusableElement[focusableElement.length - 1].focus();
+		}
+		if (isLast && !goingBackward) {
+			e.preventDefault();
+			focusableElement[0].focus();
+		}
+	}
+};
+const TrapFocus = {
+	beforeMount(el) {
+		el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
+		FOCUS_STACK.push(el);
+		if (FOCUS_STACK.length <= 1) document.addEventListener("keydown", FOCUS_HANDLER);
+	},
+	updated(el) {
+		nextTick(() => {
+			el[FOCUSABLE_CHILDREN] = obtainAllFocusableElements(el);
+		});
+	},
+	unmounted() {
+		FOCUS_STACK.shift();
+		if (FOCUS_STACK.length === 0) document.removeEventListener("keydown", FOCUS_HANDLER);
+	}
+};
+//#endregion
+export { FOCUSABLE_CHILDREN, TRAP_FOCUS_HANDLER, TrapFocus as default };
+
+//# sourceMappingURL=index.mjs.map