feat(node): push USB changes and preserve sensor setup across sessions

apps/control-station/src/core/fleet/useFleet.ts

@@ -37,14 +37,25 @@ export function useFleet() {
   }, []);
   useEffect(() => {
     let active = true;
-    let timer: ReturnType<typeof setTimeout>;
-    async function poll() {
+    let fallback: ReturnType<typeof setInterval> | undefined;
+    const read = async () => {
       try { const value = await fleetRequest<{ items: Vehicle[] }>(); if (active) { setItems(value.items); setError(""); } }
       catch { if (active) setError("Реестр недоступен. Показаны последние полученные сведения; связь сейчас не подтверждена."); }
-      finally { if (active) timer = setTimeout(poll, 5000); }
-    }
-    void poll();
-    return () => { active = false; clearTimeout(timer); };
+    };
+    void read();
+    const events = new EventSource("/api/v1/fleet/events");
+    events.onmessage = event => {
+      if (!active) return;
+      try { const value = JSON.parse(event.data); setItems(value.items); setError(""); if (fallback) { clearInterval(fallback); fallback = undefined; } }
+      catch { unavailable(); }
+    };
+    const unavailable = () => {
+      if (!active) return;
+      setError("Связь обновляется. Показаны последние полученные сведения.");
+      if (!fallback) fallback = setInterval(() => void read(), 5000);
+    };
+    events.onerror = unavailable;
+    return () => { active = false; events.close(); if (fallback) clearInterval(fallback); };
   }, []);
   return { items, error, refresh };
 }

apps/control-station/src/workspaces/fleet/VehicleSensors.tsx

@@ -4,7 +4,8 @@ import type {SensorInventory,SensorTransport} from '../../../../../packages/sens
 import {fleetRequest} from '../../core/fleet/useFleet';
 export function VehicleSensors({vehicleID,enabled,onDetailChange}:{vehicleID:string;enabled:boolean;onDetailChange:(open:boolean)=>void}){
  const transport=useMemo<SensorTransport>(()=>({
-  inventory:async()=>{const fleet=await fleetRequest<{items:{id:string;sensor_state:SensorInventory}[]}>();const value=fleet.items.find(v=>v.id===vehicleID);if(!value)throw new Error('Аппарат не найден.');return value.sensor_state;},
+  inventory:async()=>{const fleet=await fleetRequest<{items:{id:string;connectivity:string;sensor_state:SensorInventory}[]}>();const value=fleet.items.find(v=>v.id===vehicleID);if(!value)throw new Error('Аппарат не найден.');return {...value.sensor_state,fresh:value.connectivity==='online'};},
+  subscribe:(receive,unavailable)=>{const events=new EventSource('/api/v1/fleet/events');events.onmessage=e=>{try{const value=JSON.parse(e.data).items.find((v:{id:string})=>v.id===vehicleID);if(value)receive({...value.sensor_state,fresh:value.connectivity==='online'});else unavailable();}catch{unavailable();}};events.onerror=unavailable;return()=>events.close();},
   submit:value=>fleetRequest(`/${encodeURIComponent(vehicleID)}/devices/operations`,'POST',value),
   operation:id=>fleetRequest(`/${encodeURIComponent(vehicleID)}/devices/operations/${encodeURIComponent(id)}`),
  }),[vehicleID]);