01a01ecf - Stage the fourteen account-merge web baselines (22 → 36)

[TaprootFreak]

EN:
The handbook production deploy failed because the web-baseline guard still expected 22 Playwright PNGs after RealUnitCH/web added 14 for /account-merge/.
This change raises EXPECTED_WEB_BASELINE_COUNT to 36 and adds matching cards in #spec-web.
The cards describe adding a wallet address, not merging two accounts.
After this lands on staging, the staging-to-develop promotion can run that deploy again.

DE:
Der Handbook-Produktions-Deploy ist fehlgeschlagen, weil der Web-Baseline-Guard noch 22 Playwright-PNGs erwartet hat, nachdem RealUnitCH/web 14 für /account-merge/ ergänzt hat.
Diese Änderung setzt EXPECTED_WEB_BASELINE_COUNT auf 36 und ergänzt die passenden Karten in #spec-web.
Die Karten beschreiben das Hinzufügen einer Wallet-Adresse, nicht das Zusammenführen zweier Konten.
Sobald das auf staging liegt, kann der Promote staging→develop den Deploy erneut fahren.

Details

The auto-promotion PR #904 (Promote: staging -> develop) is red on deploy-prd / Build and deploy to PRD only:

Expected exactly 22 web baseline PNGs in _web-checkout/tests/__screenshots__, got 36.

Analyze & Test, Visual Regression, Coverage Floor Gate, and the PR-only Handbook Build Check stayed green: that last job does not clone RealUnitCH/web, so it never sees the count.

Cause: RealUnitCH/web#25 committed 14 new Playwright baselines for /account-merge/ (add a wallet address to an existing account). The previous handbook update of this guard was #862 (18 → 22, no-registration confirm states). There was no open PR covering 22 → 36.

New files (14):

Viewport	Files
desktop-chromium	merge-confirmed(.png + -en.png), merge-invalid(.png + -en.png), merge-already-completed(.png + -en.png), merge-unavailable(.png + -en.png)
tablet-chromium	merge-confirmed.png, merge-invalid.png (no tablet shots exist for already-completed / unavailable)
mobile-safari	merge-confirmed-mobile.png, merge-invalid.png, merge-already-completed.png, merge-unavailable.png

Same markup as the existing confirm cards in #spec-web. Intro and docs/handbook/README.md now name /account-merge/ next to /confirm-aktionariat.

No Dart, no golden regeneration, no other workflow files.

[TaprootFreak]

EN:
Ready after 1 review pass.
The handbook web-baseline guard and #spec-web cards now cover all 36 Playwright PNGs from RealUnitCH/web, including the fourteen /account-merge/ add-address screenshots.

DE:
Bereit nach 1 Review-Durchlauf.
Der Handbook-Web-Baseline-Guard und die #spec-web-Karten decken jetzt alle 36 Playwright-PNGs aus RealUnitCH/web ab, inklusive der vierzehn /account-merge/-Screenshots zum Hinzufügen einer Adresse.

Details

Review: one pass, 0 findings (quality and logic).

Comments: 0 issue comments, 0 reviews, 0 inline comments, 0 review threads.

Mergeable: MERGEABLE against staging at 842777ae. mergeStateStatus=BLOCKED is the missing human approval, not a conflict.

CI at 842777ae (non-draft run):

Check	Result
Analyze & Test	success (22m45s)
Visual Regression	success
Coverage Floor Gate	success
BitBox quirks audit	success
Build handbook image + container smoke	success
Maestro handbook flows	skipped — no tier3:full label (documented condition)

Required on staging: Analyze & Test, Visual Regression, Coverage Floor Gate — all success on this head.

This PR does not itself re-run deploy-prd on #904. That job runs on push to staging. After this merges, the auto-promotion PR should pick up the 36-count guard.