This happens because TA mode filters out all lecture lessons, so the issue arises because both CS2103T and CS3281 only have lecture lessons.

One way to fix this would be to make lectures also togglable. @zwliew, I don't mind working on this.

Yes, let's make all lessons types TA-able.

I've run into a bit of a problem for CS2103T specifically. Because one class number is associated with multiple lesson slots, this means that adding multiple tutorial slots will add a bunch of the lecture slots as well.

For example, for a timetable with the following TA config:

[[ "Lecture", "G11" ], [ "Lecture", "G15" ], ​​​​[ "Lecture", "G05" ], ​​​​[ "Lecture", "G21" ]]

This is because our toggle is based only on class numbers at the moment, so one way to overcome this is to store start and end times in TaModulesConfig as well?

This is because our toggle is based only on class numbers at the moment, so one way to overcome this is to store start and end times in TaModulesConfig as well?

I believe that adding just the start time (and day) would be enough to ensure that each slot is unique. If that works, please also add a migration to convert the current [LessonType, ClassNo] format to the new [LessonType, ClassNo, StartTime] format.