feat(l10n): translate the versioniq admin UI into Dutch

[rubenvdlinde]

The settings panel rendered entirely in English on a Dutch account: Apps, History, Sources, Tokens, Trusted sources, Discover, Artifact cache, Automatic updates, Security advisory checks. Every one of those was absent from the catalogue, not mistranslated.

Measured with a scanner that catches this.t( and $t( as well as bare t(, since a naive pattern under-reports Options-API components:

distinct t('versioniq', …) keys in src/	181
already in nl.json	25
missing	156

All 156 translated. en.json did not exist at all and is added as identity, so the pair matches the rest of the fleet and check:l10n-js has both halves to compare.

This is a separate gap from #296

#296 fixed a mechanical fault: l10n/nl.js was missing, so 27 existing translations never reached the browser. This PR is the other half — the remaining 156 strings were never written.

Fixing the artefact could not have revealed them, because before #296 all 181 rendered English identically. Only once the 27 started working did the other 156 stand out as the ones still in English.

Care taken

• Placeholders preserved exactly — {hours}, {minutes}, {level}, {source}, {min}, {max}, {forge}, {days}, {version}, {user}, {date}, {size}, {keep}, {pattern}, {count}. Verified programmatically: 0 mismatches.
• No em-dashes in the Dutch, per the writing skill's voice rules, even where the English source uses them; those become a colon or a full stop.
• Terminology kept consistent: vertrouwde bronnen, vastzetten for pin, terugrollen for roll back, artefactcache.

Verification

• check:l10n-js exits 0 — en.js 156 keys, nl.js 183.
• The file the browser actually loads was fetched from the running server: status 200, appId "versioniq", Dutch present.

One thing I could not verify: the rendered page flipping to Dutch. The local instance serves a cached nl.js under an unchanged ?v= hash and occ maintenance:repair did not rotate it, so the browser kept the old 27-key copy. That is a local caching artefact rather than evidence against the change, but it is not the end-to-end proof I would prefer.

🤖 Generated with Claude Code

[github-actions]

Quality Report — ConductionNL/versioniq @ 73d1e26

Check	PHP	Vue	Security	License	Tests
lint	✅
phpcs	✅
phpmd	✅
psalm	✅
phpstan	✅
phpmetrics	✅
eslint		✅
stylelint		✅
build		✅
composer			✅	✅ 29/29
npm			✅	✅ 302/302
app:check-code	⏭️
info.xml	✅
REUSE	❌
PHPUnit					✅
Newman					⏭️
Playwright					🚨 NO VERDICT — enabled but never ran
Hydra gates					✅

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Quality workflow — 2026-08-31 03:38 UTC

Download the full PDF report from the workflow artifacts.