- Dockerfile: use --flash_size 4MB and drop OTA data from merge_bin (OTA
data at 0xc10000 inflated binary to 12.6MB, exceeding 4MB chip flash)
- main.go: seedFirmwareDir now overwrites when source size differs, fixing
PVC staleness where old 1.6MB app-only binary was never replaced
- onboard.js: renderFlashFirmware() rewritten so all elements (button,
progress bar, status text, retry help, log panel) are inline in one
container — no separate floating modal
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>