fix: pair code modal — auto-regenerate on expiry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/EquipmentPage.tsx

@@ -68,23 +68,31 @@ function PairCodeModal({
   const [copied, setCopied] = useState(false)
   const [timeLeft, setTimeLeft] = useState(600)
 
-  useEffect(() => {
+  const fetchCode = useCallback(() => {
+    setLoading(true)
     api.workstations.pairCode(slug, workstation.id).then(r => {
       setCode(r.code)
       setExpiresAt(r.expiresAt)
+      setTimeLeft(600)
       setLoading(false)
     })
   }, [slug, workstation.id])
 
+  useEffect(() => { fetchCode() }, [fetchCode])
+
   useEffect(() => {
     if (!expiresAt) return
     const tick = setInterval(() => {
       const left = Math.max(0, Math.floor((new Date(expiresAt).getTime() - Date.now()) / 1000))
       setTimeLeft(left)
-      if (left === 0) clearInterval(tick)
+      if (left === 0) {
+        clearInterval(tick)
+        // Автоматически получаем новый код
+        fetchCode()
+      }
     }, 1000)
     return () => clearInterval(tick)
-  }, [expiresAt])
+  }, [expiresAt, fetchCode])
 
   const copy = () => {
     if (!code) return