Add getApiKey to web-ui example Agent config

Provides API keys from the provider keys store, matching old ProviderTransport behavior.

packages/web-ui/example/src/main.ts

@@ -176,6 +176,11 @@ Feel free to use these tools when needed to provide accurate and helpful respons
 		},
 		// Custom transformer: convert custom messages to LLM-compatible format
 		convertToLlm: customConvertToLlm,
+		// Get API keys from provider keys store
+		getApiKey: async (provider: string) => {
+			const key = await storage.providerKeys.get(provider);
+			return key ?? undefined;
+		},
 	});
 
 	agentUnsubscribe = agent.subscribe((event: any) => {