feat(gemini-web): squash all features and fixes for gemini-web

internal/auth/gemini/gemini-web_token.go

@@ -0,0 +1,43 @@
+// Package gemini provides authentication and token management functionality
+// for Google's Gemini AI services. It handles OAuth2 token storage, serialization,
+// and retrieval for maintaining authenticated sessions with the Gemini API.
+package gemini
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// GeminiWebTokenStorage stores cookie information for Google Gemini Web authentication.
+type GeminiWebTokenStorage struct {
+	Secure1PSID   string `json:"secure_1psid"`
+	Secure1PSIDTS string `json:"secure_1psidts"`
+	Type          string `json:"type"`
+}
+
+// SaveTokenToFile serializes the Gemini Web token storage to a JSON file.
+func (ts *GeminiWebTokenStorage) SaveTokenToFile(authFilePath string) error {
+	ts.Type = "gemini-web"
+	if err := os.MkdirAll(filepath.Dir(authFilePath), 0700); err != nil {
+		return fmt.Errorf("failed to create directory: %v", err)
+	}
+
+	f, err := os.Create(authFilePath)
+	if err != nil {
+		return fmt.Errorf("failed to create token file: %w", err)
+	}
+	defer func() {
+		if errClose := f.Close(); errClose != nil {
+			log.Errorf("failed to close file: %v", errClose)
+		}
+	}()
+
+	if err = json.NewEncoder(f).Encode(ts); err != nil {
+		return fmt.Errorf("failed to write token to file: %w", err)
+	}
+	return nil
+}