fix(dashboard): show an error state instead of a confident zero

[rubenvdlinde]

The four KPI tiles already caught their fetch failures into this.error — the shared dashboardRefreshMixin has declared error: null alongside loading all along. Nothing ever rendered it.

A failed load therefore left count at 0 and the tile showed "0 decisions", "0 votes", "0 meetings" — indistinguishable from a genuinely empty collection. Zero is a number a reader believes, which makes it worse than showing nothing.

One line per tile. CnStatsBlock's error prop (nextcloud-vue 2.19.0) renders a dash and "Unavailable", tints the tile, and takes precedence over count, loading and emptyLabel — a stale count during a failure is exactly what must not survive.

Checked rather than assumed:

• error is reactive here. It lives in the mixin's data(), not the SFCs, so grep 'error:' *KpiWidget.vue finds nothing and the binding looks broken. It isn't — all four assign this.error in their catch.
• The prop exists in the version this app resolves: package.json ranges ^2.19.0, node_modules holds 2.19.0, and that copy contains hasError(). Without that check this would have been an inert attribute — Vue drops an unknown prop silently, the page renders, the feature does nothing, and CI stays green.

eslint, prettier and the webpack build pass.

[github-actions]

Quality Report — ConductionNL/decidiq @ 44d74ce

Check	PHP	Vue	Security	License	Tests
lint	✅
phpcs	✅
phpmd	✅
psalm	✅
phpstan	✅
phpmetrics	✅
eslint		✅
stylelint		✅
build		✅
check-manifest		✅
check-nav-ceiling		✅
test-l10n		✅
format		✅
check-l10n-js		✅
check-schema-l10n		✅
composer			✅	✅ 104/104
npm			✅	✅ 557/557
app:check-code	⏭️
info.xml	✅
REUSE	❌
PHPUnit					✅
Newman					✅
Playwright					✅
Hydra gates					✅

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Quality workflow — 2026-08-27 06:36 UTC

Download the full PDF report from the workflow artifacts.