Releasing 1.6.3 for phased rollout. PR here. Contains: • Shields Robustness ◦ 1m TTL for on-device cache ◦ Writethrough on all shield button presses, CF restarts, and main app opens ◦ All shield modifications on main thread • Rule display bug fix: client now reads rule days as (1=Monday) • Fix view overflow on small phones • Better start of onboarding flow • App Update alerts can be forced by server • TOS & Privacy • Allow token linking with sibling mismatches