Point MSR-1 installer at the factory image (restores Wi-Fi setup step)

[bharvey88]

What does this change?

Fixes MSR-1 first-flash: the installer now flashes the factory image (with Improv-Serial), so esp-web-tools offers Wi-Fi setup over USB.

MSR-1's PR #97 (merged 2026-07-10) repurposed firmware/ as the end-user OTA image (MSR-1.yaml, no improv_serial) and moved the first-flash factory image (MSR-1_Factory.yaml, has improv) to firmware-factory/. The installer still pointed at firmware/, so it flashed the improv-less OTA build and the browser Wi-Fi step never appeared.

• msr-1 stable firmware → firmware-factory/manifest.json (26.7.9.1, CORS-open, verified live).
• The Add YAML view/download to device pages #3 config viewer already points at MSR-1_Factory.yaml, so it stays consistent — no change there.

Notes:

• This is the first device restructured by the unified-firmware rollout. As other devices get the same treatment, each will need the same firmware/ → firmware-factory/ switch in the registry.
• CI can't catch this — both URLs return 200, so the validator's HEAD check passes; the "wrong image, no improv" only surfaces on a real flash.

Checklist

• Playwright tests pass locally (cd tests && npx playwright test) (19 passed, 1 intentional skip)
• Any new runtime file/dir is added to the cp list in .github/workflows/pages.yml (n/a: devices.json data only)
• No new build step, framework, or runtime CDN dependency
• If devices.json changed: python scripts/validate_registry.py passes (Registry OK — all manifests + config URLs 200)

🤖 Generated with Claude Code

[coderabbitai]

Caution

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/msr1-factory-image

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