fix(setup-wizard): translate the body and the tab labels, not just the heading

[rubenvdlinde]

A setup wizard on a Dutch instance rendered "Welkom" over an English paragraph, between a translated Annuleren and Volgende. That reads as a bug rather than as a missing string, and the consuming app could not fix it from its side.

stepTitle() was routed through cnTranslate and everything else was not:

• step.body was interpolated verbatim in four places (info, choice, config-fields, run-action)
• wizardSteps() used s.title raw for the tab strip, so the same string was translated inside the step and untranslated in the tab above it
• optionsFor() returned option labels raw, so a choice step listed its options in English

How it was found

Measured on decidiq (2026-08-30), which stopped planting 334 unchosen objects on install and now asks which example set to load (decidiq#1024). It shipped correct Dutch for every one of those strings in l10n/nl.json. The heading picked it up; the question, the options and the explanation did not, because this component never asked for them.

This is the same shape as #863 ("widget titles never asked the host catalogue"): translation here is per-field, and a field nobody routed is a field that can never be localised.

What changes

• stepBody() mirrors stepTitle(), and the four raw interpolations use it
• the tab strip uses stepTitle()
• option labels are translated; option values are not

That last split is deliberate: scalarChoice() reads .value, and that is what reaches POST /api/setup/config, so translating a label cannot change what gets stored. Translating the value would.

Verification

CnSetupWizard.spec.js   21 passed  (17 existing + 4 new)
full suite             594 suites, 6997 tests, all passing

Each new test fails without the change:

• resolves a step body through the injected cnTranslate
• returns an empty body rather than undefined, so a bodyless step renders nothing
• translates the tab-strip labels, not just the heading inside the step
• translates a choice option LABEL and leaves its VALUE alone

🤖 Generated with Claude Code

[github-actions]

Quality Report — ConductionNL/nextcloud-vue @ 93be27c

Check	PHP	Vue	Security	License	Tests
lint	⏭️
phpcs	⏭️
phpmd	⏭️
psalm	⏭️
phpstan	⏭️
phpmetrics	⏭️
eslint		✅
stylelint		✅
build		✅
test		✅
check-build		✅
check-public-safe		✅
check-docs		✅
check-jsdoc		✅
check-integration-parity		✅
check-peers		✅
check-docs-fresh		✅
check-a11y		✅
check-smoke		✅
check-vue3-compile		✅
composer			✅	✅
npm			✅	✅ 556/556
app:check-code	⏭️
info.xml	⏭️
REUSE	✅
PHPUnit					⏭️
Newman					⏭️
Playwright					⏭️
Hydra gates					⏭️

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Quality workflow — 2026-08-30 23:12 UTC

Download the full PDF report from the workflow artifacts.