nvcurve with some fixes and better limits

frontend/src/hooks/useCurve.ts

@@ -0,0 +1,28 @@
+import { useEffect, useRef, useState } from 'react';
+import { api } from '../api/client';
+import { createWsConnection } from '../api/websocket';
+import { useCurveStore } from '../store/curveStore';
+import type { CurveState } from '../types';
+
+export function useCurve() {
+  const { curve, setCurve, selectedGpuIndex } = useCurveStore();
+  const [wsStatus, setWsStatus] = useState<'connecting' | 'connected' | 'disconnected'>('connecting');
+  const wsRef = useRef<ReturnType<typeof createWsConnection> | null>(null);
+
+  useEffect(() => {
+    // Initial fetch
+    api.curve(selectedGpuIndex).then(setCurve).catch(console.error);
+
+    // Subscribe to /ws/curve for push updates after writes
+    wsRef.current = createWsConnection<CurveState>(
+      '/ws/curve',
+      (data) => setCurve(data),
+      setWsStatus,
+      selectedGpuIndex,
+    );
+
+    return () => wsRef.current?.close();
+  }, [setCurve, selectedGpuIndex]);
+
+  return { curve, wsStatus };
+}