Rewrites the README to match the navigation redesign in the last
commit:
- Status section reflects the touch-bar/scroll-section layout,
replacing the outdated tab-based description
- New Design Notes explain *why* navigation changed — untested
touch-swipe fidelity on this hardware, and accessibility reasoning
for the intended client base (small factories; many users may not
have a full set of fingers/thumbs on either hand). Resistive touch
and oversized, forgiving touch zones are framed as a deliberate
choice, not a workaround, so the reasoning doesn't have to be
reconstructed from memory later.
- Known Issues trimmed to what's actually still open — the fixed items
from the v0.0.1 review (unused import, dead sparkline, missing
threshold colouring, stale class name) are removed; the Screen vs.
Container note is reframed as intentional design, not a leftover
- Roadmap updated with the touch-controller HID check
(lsusb/dmesg/evtest) flagged during hardware research — some earlier
Waveshare display revisions need a non-standard driver
