refactor(vertexai): 将VertexAI配置检查从ApiClientFactory移至VertexAPIClient

重构VertexAI客户端的配置检查逻辑，将其从工厂类移动到具体的客户端实现类中

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

@@ -1,5 +1,4 @@
 import { loggerService } from '@logger'
-import { isVertexAIConfigured } from '@renderer/hooks/useVertexAI'
 import { Provider } from '@renderer/types'
 
 import { AihubmixAPIClient } from './AihubmixAPIClient'
@@ -63,12 +62,6 @@ export class ApiClientFactory {
         break
       case 'vertexai':
         logger.debug(`Creating VertexAPIClient for provider: ${provider.id}`)
-        // 检查 VertexAI 配置
-        if (!isVertexAIConfigured()) {
-          throw new Error(
-            'VertexAI is not configured. Please configure project, location and service account credentials.'
-          )
-        }
         instance = new VertexAPIClient(provider) as BaseApiClient
         break
       case 'anthropic':

src/renderer/src/aiCore/legacy/clients/__tests__/ApiClientFactory.test.ts

@@ -66,7 +66,8 @@ vi.mock('@renderer/config/models', () => ({
   SYSTEM_MODELS: {
     silicon: [],
     defaultModel: []
-  }
+  },
+  isOpenAIModel: vi.fn(() => false)
 }))
 
 describe('ApiClientFactory', () => {

src/renderer/src/aiCore/legacy/clients/gemini/VertexAPIClient.ts

@@ -1,6 +1,6 @@
 import { GoogleGenAI } from '@google/genai'
 import { loggerService } from '@logger'
-import { createVertexProvider, isVertexProvider } from '@renderer/hooks/useVertexAI'
+import { createVertexProvider, isVertexAIConfigured, isVertexProvider } from '@renderer/hooks/useVertexAI'
 import { Model, Provider, VertexProvider } from '@renderer/types'
 import { isEmpty } from 'lodash'
 
@@ -16,6 +16,10 @@ export class VertexAPIClient extends GeminiAPIClient {
 
   constructor(provider: Provider) {
     super(provider)
+    // 检查 VertexAI 配置
+    if (!isVertexAIConfigured()) {
+      throw new Error('VertexAI is not configured. Please configure project, location and service account credentials.')
+    }
     this.anthropicVertexClient = new AnthropicVertexClient(provider)
     // 如果传入的是普通 Provider，转换为 VertexProvider
     if (isVertexProvider(provider)) {