fix(admin): 改密后管理面板永久「连接中断」+ 顶部版本号多一个 v

- /ws 身份在握手时确定，而 startRealtime() 全生命周期只建一次连接；改密会作废
  服务端全部会话，服务端以 1008 关闭该连接，前端对 1008 是永久停止重连
  （给真鉴权失败设计的）→ 重新登录后无人重启连接，界面一直显示「连接中断」，
  只有重开窗口才会用新会话重新握手。
  修：新增 restartRealtime()，登录成功与退出登录时各重启一次（同时修掉
  「访客浏览后登录，旧连接仍是 guest 身份」的问题）；1008 语义保持不变。
- AdminLayout 顶部版本号模板写死 v 前缀，而 serverHealth 已是完整版本串
  （dev_0.1.0）→ 显示成 vdev_0.1.0。

新增 web/src/admin/tests/event-realtime.test.ts 锁该行为（临时置空 restartRealtime
会失败）；为让 node --test 能加载真实 store，测试解析钩子补 @/ 别名。

web/src/admin/tests/event-realtime.test.ts

@@ -0,0 +1,91 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { createPinia, setActivePinia } from 'pinia'
+import { adminApi, mockMode } from '../api/client'
+import { useEventStore } from '../stores/event'
+
+// P0-1：WS 身份在握手时确定，登录 / 退出 / 改密后必须重建连接。
+// 旧连接被服务端 1008 拒绝后客户端会停止重连，没有 restartRealtime 就永远停在 offline。
+
+class FakeSocket {
+  static readonly CONNECTING = 0
+  static readonly OPEN = 1
+  static readonly CLOSED = 3
+  static instances: FakeSocket[] = []
+
+  readyState = FakeSocket.CONNECTING
+  onopen: (() => void) | null = null
+  onmessage: ((event: { data: unknown }) => void) | null = null
+  onerror: (() => void) | null = null
+  onclose: ((event: { code: number }) => void) | null = null
+  readonly url: string
+  readonly sent: string[] = []
+
+  constructor(url: string) {
+    this.url = url
+    FakeSocket.instances.push(this)
+  }
+
+  send(data: string): void {
+    this.sent.push(data)
+  }
+
+  close(): void {
+    this.readyState = FakeSocket.CLOSED
+    this.onclose?.({ code: 1006 })
+  }
+
+  open(): void {
+    this.readyState = FakeSocket.OPEN
+    this.onopen?.()
+  }
+}
+
+test('restartRealtime 关闭旧连接并按当前会话重建', async () => {
+  FakeSocket.instances = []
+  ;(globalThis as { WebSocket?: unknown }).WebSocket = FakeSocket
+  setActivePinia(createPinia())
+
+  adminApi.bootstrap = async () => ({
+    settings: null,
+    teams: [],
+    sports: [],
+    events: [],
+    profiles: [],
+    standings: [],
+    athleteStandings: [],
+  })
+  adminApi.health = async () => {
+    throw new Error('health 不可达')
+  }
+
+  const store = useEventStore()
+  await store.load()
+  assert.equal(store.realtimeStatus, 'connecting')
+  assert.equal(FakeSocket.instances.length, 1)
+
+  const first = FakeSocket.instances[0]
+  assert.ok(first)
+  first.open()
+  assert.equal(store.realtimeStatus, 'online')
+
+  // 改密后服务端作废全部会话，旧连接以 1008 关闭并停在 offline
+  first.readyState = FakeSocket.CLOSED
+  first.onclose?.({ code: 1008 })
+  assert.equal(store.realtimeStatus, 'offline')
+
+  store.restartRealtime()
+  assert.equal(first.readyState, FakeSocket.CLOSED)
+  assert.equal(FakeSocket.instances.length, 2)
+  assert.equal(store.realtimeStatus, 'connecting')
+  const second = FakeSocket.instances[1]
+  assert.ok(second)
+  second.open()
+  assert.equal(store.realtimeStatus, 'online')
+
+  // 示例数据模式不建真实连接
+  mockMode.value = true
+  store.restartRealtime()
+  assert.equal(store.realtimeStatus, 'idle')
+  assert.equal(FakeSocket.instances.length, 2)
+})