Is it permissible to work in engraving and carving on glass, marble, and wood to make gifts that are sold on holidays such as Christmas, Valentine's Day, and New Year's, while avoiding the depiction of animate beings and only depicting flowers and writing words? And is it permissible to make signs and logos for commercial shops and restaurants without inquiring about the nature of their merchandise, especially if they do not request the writing of anything that indicates the sale of unlawful items like alcohol?

You have done well in limiting yourself to photographing flowers and similar objects, and avoiding photographing animate beings. It is not permissible to participate in a forbidden or innovated act in any way. As for gifts and collectibles that are sold year-round, there is no harm in manufacturing them and trading in them, unless it is known that the buyer will use them for something forbidden, in which case it is not permissible to sell them to him. Advertising for shops depends on the nature of the shop; it is not permissible to advertise for a shop known for corruption and deviation, or one that sells forbidden items such as pork and alcohol. If a restaurant sells both halal and haram, it is more scrupulous to avoid it. However, if a shop is known to be free from forbidden items or its status is unknown, there is no harm in advertising for it.