refactor(react): replace prototype-walking and inferred class props (#1376)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/react/src/utils/use-sync-props.ts

@@ -0,0 +1,20 @@
+import { isUndefined } from '@videojs/utils/predicate';
+
+export function useSyncProps<Props extends object, Rest extends Record<string, unknown>>(
+  target: Props,
+  props: Partial<Props> & Rest,
+  defaults: Props
+): Omit<Rest, keyof Props> {
+  const rest: Record<string, unknown> = {};
+
+  for (const key in props) {
+    if (key in defaults) {
+      const value = isUndefined(props[key]) ? (defaults as Record<string, unknown>)[key] : props[key];
+      if (target[key as keyof typeof target] !== value) target[key as keyof typeof target] = value as any;
+    } else {
+      rest[key] = props[key];
+    }
+  }
+
+  return rest as Omit<Rest, keyof Props>;
+}