- contacts: the "?" (unknown last-heard) sink-to-end now mirrors formatAgeBadge's
exact condition (also future/garbage/>400-day timestamps, not just ==0), using
the clock captured before the sort. Fixes "no change in behaviour".
- battery chart: add a universal close X (addCloseXBadge); lighter grid + time
(vertical) division lines; axis notes (V left, MHz right, time on X); point
dots so a single/sparse sample renders; second ORANGE CPU line on a secondary
Y axis. battery.log gains a CPU-MHz column (5th field); pre-upgrade 4-col lines
read as a CPU gap.
- telemetry window: add the same universal close X.
- hide device name: park the clock CENTRED on every screen (not just Home),
clear of the left-zone title (chat / Files / map credit) and the right icons.
Signed-off-by: Dan Vybiral <dan.vybiral@greencode.cz>