feat(alarm): 设备报警监控报警提示升级与警灯交互优化 - 报警提示升级：后端新增报警派单完成接口 POST /api/worker-app/alarm-dispatches/:id/complete（供共享电工APP确认完成，归属校验403/不存在404/已完成幂等，status置1并写completed_at）；GET /api/device-alarms 的 summary 由 severeIds 改为 activeSevereIds（grade=1 且无已完成派单的报警id，倒序100条，派单完成自动移出即报警取消）并新增轻量接口 GET /api/device-alarms/active-severe；前端新建全局悬浮立体警灯组件 AlarmSirenLight（红蓝双色3D警灯，挂载主布局所有页面可见，点击跳转报警监控页，30秒轮询activeSevereIds新id即时响+每3分钟重复响，Web Audio合成警笛700/900Hz交替，浏览器自动播放静默降级）；index.vue 移除原10秒指示灯与880Hz beep、瘦身为纯列表页；警灯交互优化：警灯可鼠标拖动（位移>5px判为拖动不触发跳转）、位置经localStorage跨刷新记忆（默认右上角）、取消「重置报警提示」按钮；后端tsc与前端vue-tsc编译通过，接口实测派单完成排除逻辑生效，浏览器端到端验证通过（全局显示、点击跳转、拖动、刷新记忆、重置按钮无残留）

client/src/views/device/alarm/index.vue

@@ -19,10 +19,6 @@
 					<p class="desc">实时监控接入线路的设备报警与事件，支持按客户、等级检索并快速发起报警派单。</p>
 				</div>
 				<div class="header-right">
-					<div class="alarm-light" :class="{ active: alarmLight }" title="严重报警指示">
-						<span class="alarm-dot"></span>
-						<span>严重报警</span>
-					</div>
 					<a-button size="small" @click="handleShowSubStatus">
 						<template #icon><ApiOutlined /></template>
 						订阅状态
@@ -357,66 +353,6 @@ async function fetchWorkerOptions() {
 	}
 }
 
-// ==================== 严重报警灯 + 声音 ====================
-const notifiedSevereIds = ref<Set<number>>(new Set());
-const alarmLight = ref(false);
-let alarmLightTimer: number | undefined;
-let audioCtx: AudioContext | null = null;
-
-function scanSevereAlarms(list: DeviceAlarmRow[]) {
-	const fresh = list.filter((r) => r.alarmGrade === 1 && !notifiedSevereIds.value.has(r.id));
-	if (!fresh.length) return;
-	fresh.forEach((r) => notifiedSevereIds.value.add(r.id));
-	triggerAlarmAlert();
-}
-
-function triggerAlarmAlert() {
-	// 报警灯：点亮并保持 10 秒
-	alarmLight.value = true;
-	if (alarmLightTimer) window.clearTimeout(alarmLightTimer);
-	alarmLightTimer = window.setTimeout(() => {
-		alarmLight.value = false;
-	}, 10000);
-	// 声音：Web Audio 生成 880Hz 蜂鸣（3 次，每次 0.2s，间隔 0.1s）
-	playBeep();
-}
-
-function playBeep() {
-	try {
-		const Ctx = window.AudioContext || (window as any).webkitAudioContext;
-		if (!Ctx) return;
-		if (!audioCtx) audioCtx = new Ctx();
-		const ctx = audioCtx;
-		// 浏览器自动播放策略：处于 suspended 时尝试 resume，失败则静默降级只亮灯
-		if (ctx.state === 'suspended') {
-			ctx.resume().then(() => doBeep(ctx)).catch(() => { /* 静默降级 */ });
-		} else {
-			doBeep(ctx);
-		}
-	} catch {
-		// 静默降级：只亮灯，不阻塞
-	}
-}
-
-function doBeep(ctx: AudioContext) {
-	const now = ctx.currentTime;
-	for (let i = 0; i < 3; i++) {
-		const start = now + i * 0.3;
-		const osc = ctx.createOscillator();
-		const gain = ctx.createGain();
-		osc.type = 'sine';
-		osc.frequency.value = 880;
-		gain.gain.setValueAtTime(0.0001, start);
-		gain.gain.exponentialRampToValueAtTime(0.3, start + 0.02);
-		gain.gain.setValueAtTime(0.3, start + 0.15);
-		gain.gain.exponentialRampToValueAtTime(0.0001, start + 0.2);
-		osc.connect(gain);
-		gain.connect(ctx.destination);
-		osc.start(start);
-		osc.stop(start + 0.2);
-	}
-}
-
 // ==================== 订阅状态 ====================
 const subStatusVisible = ref(false);
 const subStatusLoading = ref(false);
@@ -449,7 +385,6 @@ async function fetchList() {
 			summary.gradeOneCount = s.gradeOneCount ?? 0;
 			summary.undispatchedCount = s.undispatchedCount ?? 0;
 		}
-		scanSevereAlarms(dataSource.value);
 	} catch {
 		// 拦截器已提示
 	} finally {
@@ -472,7 +407,7 @@ async function fetchCustomerOptions() {
 	}
 }
 
-// ==================== 轮询（30 秒） ====================
+// ==================== 轮询（30 秒，仅刷新列表） ====================
 let pollTimer: number | undefined;
 
 function startPolling() {
@@ -490,8 +425,6 @@ onMounted(() => {
 
 onUnmounted(() => {
 	if (pollTimer) window.clearInterval(pollTimer);
-	if (alarmLightTimer) window.clearTimeout(alarmLightTimer);
-	audioCtx?.close().catch(() => {});
 });
 
 // ==================== 筛选与分页 ====================
@@ -663,52 +596,6 @@ function formatTime(val?: string) {
 	gap: 10px;
 }
 
-/* 严重报警灯 */
-.alarm-light {
-	display: flex;
-	align-items: center;
-	gap: 6px;
-	padding: 4px 12px;
-	border-radius: 9999px;
-	background: #f1f5f9;
-	border: 1px solid #e2e8f0;
-	font-size: 12px;
-	font-weight: 600;
-	color: #64748b;
-	user-select: none;
-}
-
-.alarm-light .alarm-dot {
-	width: 8px;
-	height: 8px;
-	border-radius: 50%;
-	background: #cbd5e1;
-	flex-shrink: 0;
-}
-
-.alarm-light.active {
-	background: #fef2f2;
-	border-color: #fecaca;
-	color: #dc2626;
-}
-
-.alarm-light.active .alarm-dot {
-	background: #dc2626;
-	animation: alarm-blink 1s ease-in-out infinite;
-}
-
-@keyframes alarm-blink {
-	0%,
-	100% {
-		opacity: 1;
-		box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.5);
-	}
-	50% {
-		opacity: 0.3;
-		box-shadow: 0 0 0 6px rgba(220, 38, 38, 0);
-	}
-}
-
 /* 统计卡片 */
 .kpi-section {
 	flex-shrink: 0;