IELTS Band Calculator, a progress dashboard, and six new reading tests

A batch of student-facing upgrades to the hub. There is a new free IELTS Band Calculator — turn a raw Listening or Reading score into a band, and work out your overall band from all four skills, for both Academic and General Training, with the correct half-band rounding. I also rebuilt the 'My results' page into a real progress dashboard: a study streak, a this-week count, and a 30-day practice-activity chart, all built from your own history on the device. And I added six new real-exam Academic Reading tests. Small things, but they are the ones students ask for most.