feat: add Kimi authentication support and streamline device ID handling

- Introduced `RequestKimiToken` API for Kimi authentication flow.
- Integrated device ID management throughout Kimi-related components.
- Enhanced header management for Kimi API requests with device ID context.

sdk/auth/kimi.go

@@ -3,6 +3,7 @@ package auth
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/auth/kimi"
@@ -102,6 +103,9 @@ func (a KimiAuthenticator) Login(ctx context.Context, cfg *config.Config, opts *
 		exp := time.Unix(authBundle.TokenData.ExpiresAt, 0).UTC().Format(time.RFC3339)
 		metadata["expired"] = exp
 	}
+	if strings.TrimSpace(authBundle.DeviceID) != "" {
+		metadata["device_id"] = strings.TrimSpace(authBundle.DeviceID)
+	}
 
 	// Generate a unique filename
 	fileName := fmt.Sprintf("kimi-%d.json", time.Now().UnixMilli())