feat: enhance session store security and configuration

- Add 30-day max age for session cookies
- Enable HttpOnly flag
- Set SameSite to strict mode

main.go

@@ -147,7 +147,10 @@ func main() {
 	store := cookie.NewStore([]byte(common.SessionSecret))
 	store.Options(sessions.Options{
 		Path:     "/",
+		MaxAge:   2592000, // 30 days
+		HttpOnly: true,
 		Secure:   false,
+		SameSite: http.SameSiteStrictMode,
 	})
 	server.Use(sessions.Sessions("session", store))