fix: ensure API key rotation for each request (#10776)

Updated ModernAiProvider to regenerate config on every request, ensuring API key rotation is effective. Refactored BaseApiClient to use an API key getter for dynamic key retrieval, supporting key rotation when multiple keys are configured.

src/renderer/src/aiCore/index_new.ts

@@ -83,10 +83,8 @@ export default class ModernAiProvider {
       throw new Error('Model is required for completions. Please use constructor with model parameter.')
     }
 
-    // 确保配置存在
-    if (!this.config) {
-      this.config = providerToAiSdkConfig(this.actualProvider, this.model)
-    }
+    // 每次请求时重新生成配置以确保API key轮换生效
+    this.config = providerToAiSdkConfig(this.actualProvider, this.model)
 
     // 准备特殊配置
     await prepareSpecialProviderConfig(this.actualProvider, this.config)

src/renderer/src/aiCore/legacy/clients/BaseApiClient.ts

@@ -70,13 +70,19 @@ export abstract class BaseApiClient<
 {
   public provider: Provider
   protected host: string
-  protected apiKey: string
   protected sdkInstance?: TSdkInstance
 
   constructor(provider: Provider) {
     this.provider = provider
     this.host = this.getBaseURL()
-    this.apiKey = this.getApiKey()
+  }
+
+  /**
+   * Get the current API key with rotation support
+   * This getter ensures API keys rotate on each access when multiple keys are configured
+   */
+  protected get apiKey(): string {
+    return this.getApiKey()
   }
 
   /**