fix: update primary model default value to "deepseek-v4-flash"

packages/example/src/xllm/env.ts

@@ -3,7 +3,7 @@ import type { XProviderName, XReasoningEffortInput, XToolErrorStrategy } from "@
 const env = (import.meta as unknown as { env?: Record<string, string | undefined> }).env ?? {};
 
 export const primaryProvider = (env.VITE_XLLM_PROVIDER as XProviderName | undefined) ?? "deepseek";
-export const primaryModel = env.VITE_XLLM_MODEL ?? "deepseek-chat";
+export const primaryModel = env.VITE_XLLM_MODEL ?? "deepseek-v4-flash";
 export const primaryApiKey = env.VITE_XLLM_API_KEY;
 export const primaryBaseUrl = env.VITE_XLLM_BASE_URL;