Does the husband have the right to dispose of the entire amount of refugee aid (700 euros), or is the wife entitled to take her share of 350 euros, and the husband must spend on her from his own share?

The amount given to the couple is for both of them together to meet their needs as a married couple. Neither of them is allowed to dispose of their share without the other. They should spend from it on themselves, and whatever remains, they should divide equally.