I have the 0.4.6.1 build but I think I unfortunately skipped the dialogue for yosuke quests
- attend Friday party
- meet with Yosuke at night the next day
- get nanotransistor from mad science student (I think it was during random events at school)
- wait for 2nd Friday party
- meet up with yosuke again at night to give him transistor and progress the quest
- cook pizza for him
- he will give you a key to unlock lab