fix(llm): add runtime UA headers for openai-compatible requests

electron/main/ai/llm/index.ts

@@ -11,6 +11,7 @@ import type { LLMProvider, ProviderInfo, AIServiceConfig, AIConfigStore } from '
 import { MAX_CONFIG_COUNT } from './types'
 import { aiLogger } from '../logger'
 import { encryptApiKey, decryptApiKey, isEncrypted } from './crypto'
+import { buildChatLabUserAgentHeaders } from '../../utils/httpHeaders'
 import { t } from '../../i18n'
 import { completeSimple, type Model as PiModel } from '@mariozechner/pi-ai'
 
@@ -452,6 +453,7 @@ export function buildPiModel(config: AIServiceConfig): PiModel<'openai-completio
     api: 'openai-completions',
     provider: config.provider,
     baseUrl,
+    headers: config.provider === 'openai-compatible' ? buildChatLabUserAgentHeaders() : undefined,
     reasoning: config.isReasoningModel ?? false,
     input: ['text'],
     cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },

electron/main/utils/httpHeaders.ts

@@ -0,0 +1,28 @@
+import { app, session } from 'electron'
+
+export function buildChatLabUserAgentHeaders(): Record<string, string> {
+  const chatLabVersion = (() => {
+    try {
+      return app.getVersion() || 'dev'
+    } catch {
+      return 'dev'
+    }
+  })()
+
+  const chatLabTag = `ChatLab/${chatLabVersion}`
+  const runtimeUA = (() => {
+    try {
+      return session.defaultSession.getUserAgent()
+    } catch {
+      // 默认会话未就绪时使用 Electron 级别回退 UA
+      return app.userAgentFallback || ''
+    }
+  })()
+  const userAgent = runtimeUA.includes(chatLabTag) ? runtimeUA : `${runtimeUA} ${chatLabTag}`.trim()
+
+  return {
+    // 使用运行时真实 UA，并附加 ChatLab 版本标识，避免网关按 UA 策略拦截。
+    'User-Agent': userAgent,
+    'X-ChatLab-Client': chatLabTag,
+  }
+}