Is the wife obligated to share with her husband his expenses and possessions, and what is the way for the wife to protect her financial rights, especially after losing trust in her husband, and is it permissible for her to ask him to return her money that she spent in Syria at its current value in Euros?

It is not the husband's right to compel his wife to combine her money with his or to lend to someone she does not wish to lend to, for the wife has her independent financial autonomy. Whatever the husband takes from her money without her cheerful consent, he is obligated to return it, and what is taken out of shyness is like what is usurped in terms of prohibition. It is permissible for the spouses to mix their money with their mutual consent. As for a debt owed in a specific currency, if they agree to repay it in another currency, there is no harm, and its value is considered on the day of repayment.