feat: 完成 Passkey 能力与前后台加载优化

更新说明：\n1. 新增用户端与管理员端 Passkey 登录/注册/设备管理（最多3台，支持设备备注、删除设备）。\n2. 修复 Passkey 注册与登录流程中的浏览器/证书/CSRF相关问题，增强错误提示。\n3. 前台登录页改为独立入口，首屏仅加载必要资源，其他页面按需加载。\n4. 系统配置页改为静默获取金山文档状态，避免首屏阻塞，并优化状态展示为“检测中/已登录/未登录/异常”。\n5. 补充后端接口与页面渲染适配，修复多入口下样式依赖注入问题。\n6. 同步更新前后台构建产物与相关静态资源。

app-frontend/src/api/http.js

@@ -1,5 +1,4 @@
 import axios from 'axios'
-import { ElMessage } from 'element-plus'
 
 let lastToastKey = ''
 let lastToastAt = 0
@@ -7,13 +6,76 @@ let lastToastAt = 0
 const RETRYABLE_STATUS = new Set([408, 425, 429, 500, 502, 503, 504])
 const MAX_RETRY_COUNT = 1
 const RETRY_BASE_DELAY_MS = 300
+const TOAST_STYLE_ID = 'zsglpt-lite-toast-style'
+
+function ensureToastStyle() {
+  if (typeof document === 'undefined') return
+  if (document.getElementById(TOAST_STYLE_ID)) return
+  const style = document.createElement('style')
+  style.id = TOAST_STYLE_ID
+  style.textContent = `
+    .zsglpt-lite-toast-wrap {
+      position: fixed;
+      right: 16px;
+      top: 16px;
+      z-index: 9999;
+      display: flex;
+      flex-direction: column;
+      gap: 8px;
+      pointer-events: none;
+    }
+    .zsglpt-lite-toast {
+      max-width: min(88vw, 420px);
+      padding: 10px 12px;
+      border-radius: 10px;
+      color: #fff;
+      font-size: 13px;
+      font-weight: 600;
+      box-shadow: 0 8px 20px rgba(15, 23, 42, 0.24);
+      opacity: 0;
+      transform: translateY(-6px);
+      transition: all .18s ease;
+    }
+    .zsglpt-lite-toast.is-visible {
+      opacity: 1;
+      transform: translateY(0);
+    }
+    .zsglpt-lite-toast.is-error {
+      background: linear-gradient(135deg, #ef4444, #dc2626);
+    }
+  `
+  document.head.appendChild(style)
+}
+
+function ensureToastWrap() {
+  if (typeof document === 'undefined') return null
+  ensureToastStyle()
+  let wrap = document.querySelector('.zsglpt-lite-toast-wrap')
+  if (wrap) return wrap
+  wrap = document.createElement('div')
+  wrap.className = 'zsglpt-lite-toast-wrap'
+  document.body.appendChild(wrap)
+  return wrap
+}
+
+function showLiteToast(message) {
+  const wrap = ensureToastWrap()
+  if (!wrap) return
+  const node = document.createElement('div')
+  node.className = 'zsglpt-lite-toast is-error'
+  node.textContent = String(message || '请求失败')
+  wrap.appendChild(node)
+  requestAnimationFrame(() => node.classList.add('is-visible'))
+  window.setTimeout(() => node.classList.remove('is-visible'), 2300)
+  window.setTimeout(() => node.remove(), 2600)
+}
 
 function toastErrorOnce(key, message, minIntervalMs = 1500) {
   const now = Date.now()
   if (key === lastToastKey && now - lastToastAt < minIntervalMs) return
   lastToastKey = key
   lastToastAt = now
-  ElMessage.error(message)
+  showLiteToast(message)
 }
 
 function getCookie(name) {