fix(gui): unreadable bars, wasted space, and overrunning labels

Progress bar labels were painted in the style's foreground, which Dewey
also uses as the fill colour, so a label vanished exactly as its bar
filled -- unreadable at the one moment worth reading. Readings now sit in
their own row and the bars carry no text.

Overview stopped around 500px of a 900px window, which read as an
unfinished pane rather than a quiet machine. It now also lists attached
storage and the busiest network interfaces, sorted by traffic: twenty
interfaces are mostly idle virtual ones, and the first four
alphabetically say nothing about the machine.

Long labels ran through the value beside them -- "vEthernet (WSL
(Hyper-V firewall)" is wider than the 190px gutter -- so they are clamped
with an ellipsis.

HANDOFF.md records the intermittent blank-render bug. It is not
maximize-only as I first reported: an ordinary SetWindowPos to the size
the window already was produced an entirely white window, while the same
call had rendered correctly minutes earlier. It reproduces in Dewey's own
counter_agpu example, three fixes failed, and all of them were reverted
rather than left in Dewey as guesses. The note records what was tried and
the detail that kills the obvious fix: winit's own inner_size() reports
the stale size too.

840 tests, 0 failures. clippy -D warnings clean.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>