fix: debounce display of signing canvas

Debounces the display of the signing canvas to avoid situtations where the canvas renders to 2px due to rendering while a transition is being performed.

apps/web/hooks/use-debounced-value.ts

@@ -0,0 +1,18 @@
+import { useEffect, useState } from "react";
+
+export function useDebouncedValue<T>(value: T, delay: number) {
+  // State and setters for debounced value
+  const [debouncedValue, setDebouncedValue] = useState(value);
+
+  useEffect(() => {
+    const handler = setTimeout(() => {
+      setDebouncedValue(value);
+    }, delay);
+
+    return () => {
+      clearTimeout(handler);
+    };
+  }, [value, delay]);
+
+  return debouncedValue;
+}