fix: 将 costrict 加入 is3P 判断，消除登录后"Not logged in"提示

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/utils/auth.ts

@@ -117,6 +117,8 @@ export function isAnthropicAuthEnabled(): boolean {
     isEnvTruthy(process.env.CLAUDE_CODE_USE_BEDROCK) ||
     isEnvTruthy(process.env.CLAUDE_CODE_USE_VERTEX) ||
     isEnvTruthy(process.env.CLAUDE_CODE_USE_FOUNDRY) ||
+    isEnvTruthy(process.env.CLAUDE_CODE_USE_COSTRICT) ||
+    (settings as any).modelType === 'costrict' ||
     (settings as any).modelType === 'openai' ||
     (settings as any).modelType === 'gemini' ||
     !!process.env.OPENAI_BASE_URL ||