feat(drawer): replace vaul-vue with reka-ui's native Drawer

[gabrielstuff]

Summary

Replaces vaul-vue in UDrawer with reka-ui's own (newer) native Drawer primitives, fixing the SSR crash currently thrown by vaul-vue.

• Confirmed the crash directly: vaul-vue@0.4.1's DrawerContent calls useScaleBackground() synchronously during setup(), which reads document.body.style.backgroundColor unguarded — throws document is not defined when the drawer's portal is force-mounted for SSR. Repro: https://stackblitz.com/fork/github/gabrielstuff/vaul-vue-ssr-crash-repro (contrast: reka-ui's Drawer SSRs cleanly under the identical setup — https://stackblitz.com/fork/github/gabrielstuff/reka-ui-drawer-ssr-ok).
• reka-ui was already a dependency (used elsewhere in the library); vaul-vue is now removed entirely.
• reka-ui's Drawer is headless/unstyled, so the open/close slide, live swipe-follow transform, and overlay fade are now authored as Tailwind utilities driven by reka's --drawer-* CSS custom properties, following the same pattern already used for Slideover's enter/exit animations (data-[state=open]:animate-[...]).

Behavioral changes

• dismissible: false is now enforced centrally on the open-change reason (blocks escape-key, outside-press, swipe, and reason-less closes), rather than by intercepting individual outside-click/escape DOM events the way Modal does — reka's swipe-to-dismiss gesture closes the drawer directly through onOpenChange, bypassing those DOM events entirely, so the old interception pattern would have left swipe-to-dismiss un-blockable.
• Nested drawers no longer need the nested prop — reka-ui's Drawer detects nesting automatically via context. The prop is removed; DrawerNestedExample and the playground demo are updated.
• Props with no reka-ui equivalent are dropped: shouldScaleBackground, setBackgroundColorOnScale, scrollLockTimeout, fixed, noBodyStyles, handleOnly, preventScrollRestoration, closeThreshold. reka-ui's Drawer doesn't implement a background-scale effect, manual scroll-lock timing, or a handle-only drag restriction today. The data-vaul-drawer-wrapper root attribute (only needed for the scale-background feature) is removed from the docs app.
• activeSnapPoint is renamed to snapPoint/defaultSnapPoint to match reka-ui's naming (v-model:snap-point).

Test plan

• pnpm vitest run — full suite passes (256 files / 6365 tests), including regenerated snapshots for Drawer, DashboardSidebar, and Header (the two consumers embedding a mobile drawer).
• pnpm typecheck — clean.
• pnpm lint — clean.
• Manually exercised the playgrounds/nuxt drawer demo page in a browser: all 4 directions, inset toggle, nested drawers (auto-scale of the parent, no nested prop), and the dismissible: false demo — confirmed outside-click and Escape are both blocked while the explicit close button still works. No console errors/warnings from the Drawer itself.

🤖 Generated with Claude Code

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@6691

commit: 496bf5e