The idea of specifying "bleed" is to make the carousel aware of its
vertical display area. The top bleed is under the filter control; bottom
beneath the toolbar. At the end of the day, the point of panel X offset
incursion, and the scroll target for current selection, should be at the
centre of the screen.
The fixes match code which already exists in the previous
implementation. Basically, without incorporating `BleedTop` into
calculations a second time, the centre position would not match
expectations (of being the centre including bleed).
Resolves one part of
https://github.com/ppy/osu/discussions/32568#discussioncomment-12612928
A few caveats:
- Layout is slightly different than web intentionally. Web does things
that I think will be difficult to reproduce or just plain look bad in
client, such as:
- On web, the metadata info box has 200px min height and 300px max
height. I just hardcoded 300 units.
- On web, user tags and mapper tags are individually scrollable, and
the amount of space taken up by each is calculated in a way that
is - as far as I can tell - indeterminate, and probably influenced
by some flexbox magic. I just made the entire thing scrollable
instead.
- Because song select shares controls with the beatmap set overlay, now
song select says "Mapper Tags" in the header instead of just "Tags"
too. I think this is fine, because people asked for user tags to be
shown in song select too.
- Search query syntax lifted from
https://github.com/ppy/osu-web/pull/12047.
- Using hardcoded English strings for now, will update to the
translations after the next osu-resources localisations update.