What has been mentioned in the Noble Prophetic Sunnah regarding someone who passes away in the prime of youth (25 years old) at dawn on a Friday, and who had recently been praying regularly? And what is the interpretation of the visions that some people report concerning the deceased's state in their barzakh life?

There is no text or hadith (definition) specifically about the death of young people, except if the death is sudden. "Sudden death is a comfort for the believer and a regrettable capture for the wicked." As for dying on Friday or its eve, the Prophet (peace and blessings be upon him) said: "No Muslim dies on Friday or Friday eve except that Allah protects him from the trial of the grave."