chore: code improvements

Author: ignaciosantise

packages/appkit/src/AppKit.ts

@@ -257,7 +257,7 @@ export class AppKit {
     if (!connection || !connection.adapter || !connection.adapter.connector) return null;
 
     try {
-      return connection.adapter.connector.getProvider() as T;
+      return connection.adapter.connector.getProvider() as T | null;
     } catch (error) {
       // Provider not initialized yet during session restoration
       // This can happen on app restart when restoring a previous connection

packages/appkit/src/hooks/useProvider.ts

@@ -40,7 +40,9 @@ export function useProvider(): ProviderResult {
   const { connection } = useSnapshot(ConnectionsController.state);
 
   const returnValue = useMemo(() => {
-    if (!connection) return { provider: undefined, providerType: undefined };
+    if (!connection || !connection.adapter) {
+      return { provider: undefined, providerType: undefined };
+    }
 
     try {
       return {