Technician guide with screenshots; USB 2.0 type-A cable requirement

docs/INSTRUKCJA_TECHNIKA.md: install, update, connecting the box, reading
the Diagnosis panel, guided checks, Wi-Fi over USB, flashing, SD card,
service report, LED table and common problems, with screenshots of the
app rendered from a real v13 capture (docs/img). The box must be
connected with a USB 2.0 type-A cable directly to the computer; the
quick-start screen and README say so too.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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kkallasandClaude Opus 5.5 committed 2026-09-30 15:39:02 +02:00
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