Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/internal/platform/liveattestation/attestation.go

@@ -0,0 +1,17 @@
+package liveattestation
+
+import (
+	"context"
+	"errors"
+)
+
+var (
+	ErrUnsupportedPlatform = errors.New("live attestation is only supported when Sub2API runs on macOS; Windows support is not implemented yet")
+	ErrChatGPTAppMissing   = errors.New("live attestation requires the official ChatGPT app on the Sub2API server")
+)
+
+// Provider 在发起 Live 请求前生成 ChatGPT DeviceCheck attestation。
+type Provider interface {
+	Check(ctx context.Context) error
+	Generate(ctx context.Context) (string, error)
+}