fix: type GlobalDataContext to fix build

Convert GlobalDataContext.jsx to .tsx with proper interface so
setEmailConfirmation and setPlatformSettings are typed as
Dispatch<SetStateAction<T>> | null instead of literal null.

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

Author: arbrandes

src/data/contexts/GlobalDataContext.jsx

@@ -0,0 +1,31 @@
+import { createContext, Dispatch, SetStateAction } from 'react';
+
+interface EmailConfirmation {
+  isNeeded: boolean,
+  sendEmailUrl: string,
+}
+
+interface PlatformSettings {
+  courseSearchUrl: string,
+}
+
+interface GlobalDataContextType {
+  emailConfirmation: EmailConfirmation,
+  platformSettings: PlatformSettings,
+  setEmailConfirmation: Dispatch<SetStateAction<EmailConfirmation>> | null,
+  setPlatformSettings: Dispatch<SetStateAction<PlatformSettings>> | null,
+}
+
+const GlobalDataContext = createContext<GlobalDataContextType>({
+  emailConfirmation: {
+    isNeeded: false,
+    sendEmailUrl: '',
+  },
+  platformSettings: {
+    courseSearchUrl: '',
+  },
+  setEmailConfirmation: null,
+  setPlatformSettings: null,
+});
+
+export default GlobalDataContext;