Bathroom leak / door trim rotten
The tiles should be ok, except for mold (which is easy to clean). 100% I'd apply silicone under the shower screen (external and internal if possible). Replace the door trim if possible (depending of your budget) if not and if you have a multitool remove the lower part and try your best covering it. Before anything, clean everything and apply an anti mold solution, since probably you already have some dots (based on the extent of the pictures)