feat(integration): 新增数据接入监控页

- 字段：车牌 / VIN / 品牌+型号 / GB32960 状态+最后接收 / JT808 状态+最后接收 / 接入时间
- 状态：在线 / 断流 / 未对接，三色 pill + 脉冲点
- 重点标记：双协议均未对接的车辆 → 行红底 + 警示图标 + 顶部 banner
- 工具栏：搜索（车牌/VIN/品牌/型号）+ 5 维筛选 + 4 维排序 + CSV 导出
- KPI：总车辆 / GB 在线 / GB 断流 / JT 在线 / JT 断流 / 完全未对接
- 数据：fleet.js 增 brand/model/gbStatus/gbLastSeen/jtStatus/jtLastSeen/onboardAt
- 路由 #/integration · sidebar 增 plug 图标项

components/chrome.jsx

@@ -1,12 +1,13 @@
 // chrome.jsx — Sidebar, Topbar shared chrome (route-aware)
 
 const SIDEBAR_ITEMS = [
-  { id: "overview", icon: "map",     label: "实时地图" },
-  { id: "detail",   icon: "car",     label: "车辆详情" },
-  { id: "history",  icon: "history", label: "历史查询" },
-  { id: "playback", icon: "route",   label: "轨迹回放" },
-  { id: "alarm",    icon: "bell",    label: "事件规则" },
-  { id: "inbox",    icon: "inbox",   label: "通知中心" },
+  { id: "overview",    icon: "map",     label: "实时地图" },
+  { id: "detail",      icon: "car",     label: "车辆详情" },
+  { id: "history",     icon: "history", label: "历史查询" },
+  { id: "playback",    icon: "route",   label: "轨迹回放" },
+  { id: "alarm",       icon: "bell",    label: "事件规则" },
+  { id: "inbox",       icon: "inbox",   label: "通知中心" },
+  { id: "integration", icon: "plug",    label: "数据接入监控" },
 ];
 const SIDEBAR_SUB = [
   { id: "esg",      icon: "chart",    label: "ESG·碳减排" },