refactor(auth): replace TokenRecord with coreauth.Auth and migrate TokenStore to coreauth.Store

- Replaced `TokenRecord` with `coreauth.Auth` for centralized and consistent authentication data structures.
- Migrated `TokenStore` interface to `coreauth.Store` for alignment with core CLIProxy authentication.
- Updated related login methods, token persistence logic, and file storage handling to use the new `coreauth.Auth` model.

sdk/auth/manager.go

@@ -5,17 +5,18 @@ import (
 	"fmt"
 
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+	coreauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 )
 
 // Manager aggregates authenticators and coordinates persistence via a token store.
 type Manager struct {
 	authenticators map[string]Authenticator
-	store          TokenStore
+	store          coreauth.Store
 }
 
 // NewManager constructs a manager with the provided token store and authenticators.
 // If store is nil, the caller must set it later using SetStore.
-func NewManager(store TokenStore, authenticators ...Authenticator) *Manager {
+func NewManager(store coreauth.Store, authenticators ...Authenticator) *Manager {
 	mgr := &Manager{
 		authenticators: make(map[string]Authenticator),
 		store:          store,
@@ -38,12 +39,12 @@ func (m *Manager) Register(a Authenticator) {
 }
 
 // SetStore updates the token store used for persistence.
-func (m *Manager) SetStore(store TokenStore) {
+func (m *Manager) SetStore(store coreauth.Store) {
 	m.store = store
 }
 
-// Login executes the provider login flow and persists the resulting token record.
-func (m *Manager) Login(ctx context.Context, provider string, cfg *config.Config, opts *LoginOptions) (*TokenRecord, string, error) {
+// Login executes the provider login flow and persists the resulting auth record.
+func (m *Manager) Login(ctx context.Context, provider string, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, string, error) {
 	auth, ok := m.authenticators[provider]
 	if !ok {
 		return nil, "", fmt.Errorf("cliproxy auth: authenticator %s not registered", provider)
@@ -61,7 +62,13 @@ func (m *Manager) Login(ctx context.Context, provider string, cfg *config.Config
 		return record, "", nil
 	}
 
-	savedPath, err := m.store.Save(ctx, cfg, record)
+	if cfg != nil {
+		if dirSetter, ok := m.store.(interface{ SetBaseDir(string) }); ok {
+			dirSetter.SetBaseDir(cfg.AuthDir)
+		}
+	}
+
+	savedPath, err := m.store.Save(ctx, record)
 	if err != nil {
 		return record, "", err
 	}