refactor(theme): Plan 2.5 P3 — dark mode class on <html> (AD-2.5-D1 + Fix 6)
Per RFC-WS-PRIMEVUE-PLAN-2-5 §4 AD-2.5-D1 and §5.6 Fix 6. Single class
on <html> drives both PrimeVue darkModeSelector and Tailwind v4
@custom-variant dark — one toggle, two ecosystems react.
Audit findings (pre-change):
- applyDomAttributes was writing BOTH data-theme="dark" AND .dark on
documentElement. The historic data-theme write is the design-doc §4
mechanism that AD-2.5-D1 supersedes; the .dark toggle was already
correct (and is already paired with PrimeVue darkModeSelector: '.dark'
in plugins/primevue/index.ts:31, verified in P1).
- tailwind.css had NO @custom-variant dark directive — Tailwind v4
default is `prefers-color-scheme` (OS-controlled), so utility
`dark:` variants would have ignored the topbar toggle entirely.
- One stray .dark subtree wrapper in AppTopbar.stories.ts:56
(DarkTheme story) — deliberate Storybook isolation per its comment,
but in violation of AD-2.5-D1's single-source-of-truth rule.
Changes:
- useShellUiStore.applyDomAttributes(): removed data-theme write,
kept .dark class toggle on document.documentElement, kept
data-density (P6 wires density-toggle UI; density is an
orthogonal axis and unaffected). File-header comment updated to
cite AD-2.5-D1 + reference the Tailwind & PrimeVue mirror sites.
- assets/styles/tailwind.css: added
`@custom-variant dark (&:where(.dark, .dark *))` so utility
`dark:` classes resolve via the same .dark trigger.
- components-v2/layout/AppTopbar.stories.ts: stripped class="dark"
from the DarkTheme story's render wrapper. Story comment updated
to flag that visual confirmation now comes via parity-batch
Playwright (after Plan 2.5 closes), not Storybook autodocs. A
proper documentElement-mutating decorator is a backlog item.
- stores/__tests__/useShellUiStore.spec.ts: updated the existing
applyDomAttributes assertion to drop the data-theme expectation
(the write is gone); added a new `describe('applyDomAttributes
— dark mode (AD-2.5-D1)', …)` block with 2 specs (class toggle
reactive, no data-theme attribute written).
Re-grep verification — all three return 0 hits:
- stray .dark in v2 (excluding `dark:` utility prefixes)
- data-theme setAttribute calls in stores/
- [data-theme=…] CSS selectors anywhere
Suite delta: 573 → 575 (+2). vue-tsc clean. Scoped ESLint clean.
Note: darkModeSelector: '.dark' was already set in
plugins/primevue/index.ts:31 (verified in P1 audit) — the config
dimension of AD-2.5-D1 was satisfied before this commit; P3 closes
the store-side, Tailwind-side, and stray-class dimensions.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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@@ -13,6 +13,16 @@
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@plugin "tailwindcss-primeui";
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@source "../../**/*.{vue,ts,js,tsx,jsx}";
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/* AD-2.5-D1 (RFC-WS-PRIMEVUE-PLAN-2-5 §4): align Tailwind v4's `dark:`
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* variant to the same `.dark` class on <html> that PrimeVue's
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* darkModeSelector and useShellUiStore.applyDomAttributes use. Without
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* this, Tailwind v4 defaults to `prefers-color-scheme` (OS-controlled),
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* and the explicit toggle in the topbar would update PrimeVue
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* components but leave Tailwind utility classes (e.g. `dark:bg-*`,
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* `dark:text-*`) responding only to the OS — half-broken dark mode.
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*/
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@custom-variant dark (&:where(.dark, .dark *));
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/* AD-2.5-T1 — typography (RFC-WS-PRIMEVUE-PLAN-2-5).
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*
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* Inter is loaded via @fontsource/inter in main.ts (weights 400/500/600/700,
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