Remove old flutter code for React code

client/src/contexts/MediaContext.tsx

@@ -0,0 +1,26 @@
+import React, { createContext, useState, useContext } from 'react';
+
+interface MediaContextType {
+  mediaFile: { name: string; url: string; type: string } | null;
+  setMediaFile: (file: { name: string; url: string; type: string }) => void;
+}
+
+const MediaContext = createContext<MediaContextType | undefined>(undefined);
+
+export const MediaProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const [mediaFile, setMediaFile] = useState<MediaContextType['mediaFile']>(null);
+
+  return (
+    <MediaContext.Provider value={{ mediaFile, setMediaFile }}>
+      {children}
+    </MediaContext.Provider>
+  );
+};
+
+export const useMediaContext = () => {
+  const context = useContext(MediaContext);
+  if (!context) {
+    throw new Error("useMediaContext must be used within a MediaProvider");
+  }
+  return context;
+};