refactor(auth): replace FileStore with FileTokenStore for unified token persistence

- Removed `FileStore` in favor of the new `FileTokenStore`.
- Centralized auth JSON handling and token operations through `FileTokenStore`.
- Updated all components to utilize `FileTokenStore` for consistent storage operations.
- Introduced `SetBaseDir` and directory locking mechanisms for flexible configurations.
- Enhanced metadata management, including path resolution and deep JSON comparisons.

sdk/auth/refresh_registry.go

@@ -0,0 +1,29 @@
+package auth
+
+import (
+	"time"
+
+	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
+)
+
+func init() {
+	registerRefreshLead("codex", func() Authenticator { return NewCodexAuthenticator() })
+	registerRefreshLead("claude", func() Authenticator { return NewClaudeAuthenticator() })
+	registerRefreshLead("qwen", func() Authenticator { return NewQwenAuthenticator() })
+	registerRefreshLead("gemini", func() Authenticator { return NewGeminiAuthenticator() })
+	registerRefreshLead("gemini-cli", func() Authenticator { return NewGeminiAuthenticator() })
+	registerRefreshLead("gemini-web", func() Authenticator { return NewGeminiWebAuthenticator() })
+}
+
+func registerRefreshLead(provider string, factory func() Authenticator) {
+	cliproxyauth.RegisterRefreshLeadProvider(provider, func() *time.Duration {
+		if factory == nil {
+			return nil
+		}
+		auth := factory()
+		if auth == nil {
+			return nil
+		}
+		return auth.RefreshLead()
+	})
+}