fix(landing): localize the injected supported-rails FAQ and anchor it by id

[0xkkonrad]

Problem

Two locale bugs in the code-injected "Which networks, tokens and banks…" FAQ on the localized landings (/es-419, /es-ar, /pt-br), both visible on prod today:

1. withSupportedRails anchored the insert on the English question text (/what is peanut\??/i), so on localized pages the rails FAQ falls to the end of the list instead of slotting after "¿Qué es Peanut?" / "O que é o Peanut?".
2. The question + answer were English constants, so one English FAQ entry sits inside the otherwise-translated FAQ lists — also emitted into the FAQPage JSON-LD.

Fix

• Anchor by FAQ id ('1') — the content/landing/{locale}.md files keep FAQ ids aligned across locales by design.
• Move the question + answer sentence templates into the marketing i18n catalogs (landingSupportedRailsFaqQuestion / landingSupportedRailsFaqAnswer / listJoinAnd), interpolated via the existing t() helper. The fact lists (EVM chains, other chains, fiat rails) still derive from rhino.consts, so the public answer can't drift from what the app supports.
• Translations follow the register of each catalog (tú for es-419, voseo for es-ar, você for pt-br) and were reviewed by an independent native-speaker pass.

Verification

• jest src/i18n — 117 tests green (incl. key-parity + placeholder-parity across locales).
• tsc --noEmit: 231 pre-existing TS2307 module-resolution errors in this worktree (uninitialized src/content submodule / asset stubs), zero in changed files, all-TS2307 histogram identical in kind to untouched base.
• Prettier: no changes needed.

Notes

• Overlap: feat(landing): homepage rebuild — persona manifesto, card beat high, /lp/card retired #2690 (homepage rebuild) appends to the same i18n catalogs — no shared code files, whichever lands second has a trivial additive rebase.
• Known follow-up: FIAT_RAILS region labels ("United States", "36 countries", …) still render in English inside the localized answer and in the client chip UI (SupportedRailsFaqAnswer) — localizing those touches the chip component and is left for a separate small PR.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
peanut-wallet	Ready	Preview	Aug 17, 2026 1:28pm

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[github-actions]

Code-analysis diff

Painscore total: 7158.71 → 7159.84 (+1.13)
Findings: 0 net (+3 new, -3 resolved)

🆕 New findings (3)

• medium complexity — src/lib/landingContent.ts — CC 14, MI 61.32, SLOC 55
• medium complexity — src/constants/faq.consts.ts — CC 3, MI 56.98, SLOC 48
• low high-mdd — src/lib/landingContent.ts:65 — readLandingContent: MDD 11.0 (uses across many lines from declarations)

✅ Resolved (3)

• src/lib/landingContent.ts — CC 14, MI 61.2, SLOC 56
• src/constants/faq.consts.ts — CC 2, MI 54.74, SLOC 39
• src/lib/landingContent.ts:71 — readLandingContent: MDD 11.0 (uses across many lines from declarations)

📈 Painscore deltas (top movers)

File	Before	After	Δ
src/constants/faq.consts.ts	5.0	6.0	+1.0

[github-actions]

🧪 UI test report — ✅ all green

Suites

• ✅ unit: 3063 ran, 0 failed, 0 skipped, 50.6s

📊 Coverage (unit)

metric	%
statements	66.9%
branches	52.0%
functions	57.2%
lines	67.7%

⏱ 10 slowest test cases

time	test
3.4s	src/components/Card/share-asset/__tests__/shareAssetLayout.test.ts › never places two stickers in heavy overlap (broad seed sweep)
1.0s	src/utils/__tests__/demo-api.test.ts › isDemoMode() is false when not running under Capacitor
0.4s	src/app/actions/__tests__/api-headers.test.ts › should include Content-Type in validateInviteCode
0.4s	src/utils/__tests__/sentry.utils.test.ts › defaults to the client budget under a browser global
0.3s	src/components/Card/share-asset/__tests__/shareAssetLayout.test.ts › every sticker stays within canvas at any count
0.3s	src/app/(mobile-ui)/withdraw/__tests__/withdraw-states.test.tsx › Bank withdrawal keeps the $1 minimum for sub-$1 amounts
0.3s	src/utils/__tests__/sentry.utils.test.ts › still lets a per-call timeoutMs win over the default
0.3s	src/utils/__tests__/auth-token.test.ts › authReady does not park — hydrates the plain token without an unlock
0.3s	src/utils/__tests__/auth-token.test.ts › returns the token hydrated from Preferences after authReady
0.2s	src/utils/__tests__/auth-token.test.ts › is none — never guarded — when only the guarded marker is present

_{📍 Inline annotations are in the **Unit test report** check above. Coverage artifact: `coverage-unit`. Generated by `.github/workflows/tests.yml`.}