PR #7810 - superset-sh/superset

What

Replaces the anchored comment popover on apps/mobile page comments with a single bottom sheet, adds a native module for its quick replies, and makes the all-comments screen share the same composer.

	Before	After
Surface	floating card placed by `popoverPlacement()`	one `formSheet` route
Quick replies	icon row inside the card	UIKit buttons with SF Symbols, under the composer
Presets	a second sheet pushed from the card	a native `UIMenu` anchored to the ellipsis
Keyboard	`keyboardWillShow` listeners + a 250ms `withTiming` settle	UIKit
Dismissal	an ✕ plus a `pointer-down` message from inside the WebView	drag, tap-outside, swipe

Why

The card had to be placed, and placement kept losing. It started at an assumed ESTIMATED_HEIGHT and moved after onLayout, so the first frame was wrong. It modelled the keyboard by hand. And on a tall block both branches of the flip covered the block being commented on: below didn't fit, above sat on top of it.

A sheet has no placement. It's bottom-anchored at a height that fits its contents, and on iOS 26 a partial detent is Liquid Glass that floats clear of the edges, so the page stays visible behind it.

The native module

apps/mobile/AGENTS.md says a sheet body is RN + uniwind and never @expo/ui SwiftUI content. But an anchored menu is presented by UIKit outside the React Native view tree — JS can't draw one without it clipping to the sheet and hand-imitating the material, the animation and the VoiceOver semantics.

The house answer is a module of our own: alert-prompt wraps UIAlertController, composer already uses UIMenu. So this adds @superset/symbol-button — a UIButton whose content is an SF Symbol, which given items carries a UIMenu with showsMenuAsPrimaryAction. enabled maps to isEnabled, so a disabled quick reply stops taking taps rather than only dimming.

The branch's first cut used @expo/ui and was replaced (486ee6c4d) to honour the rule.

Its event is onTap, not onPress: React Native registers topPress as a direct event, and a view manager declaring the same name as bubbling makes registration throw.

Also in here

The page header is now glass with no title (pageScreenOptions → glassHeaderOptions). Four toolbar buttons plus a title read as compressed, and pages carry their own title in the content. The WebView's contentInset exists because of that: getBoundingClientRect() inside the document doesn't know about a native content inset, so the pin/highlight overlay starts at the same offset or every pin sits a header's height too high.
popoverPlacement (shared with desktop) gains a bottom clamp so a flipped card can't run off the container.
A bun patch drops expo-observe's podspec from Swift 6 to 5 — under Xcode 26.3 its mutable global state is a fatal diagnostic and blocked every local iOS build. Behaviour-neutral (no Swift-6-only syntax in the package), with a guard test in the house style per patches/README.md.
formatRelativeTime fell back to format(0), which numeric: "always" renders as "in 0s" — a freshly posted comment read as the future for its first second.
Three new i18n ids (quick-reply labels with a context), translated in all 17 locales.
The design plan is committed under plans/.

Testing

packages/shared and packages/i18n suites pass; tsc --noEmit, biome and check:i18n clean
Driven end to end on the simulator with Maestro against the production API: page → comment mode → block → typed post, thumbs-up, menu preset → pins → all comments → reply. Both native events reach JS and create threads.

Known gaps

A selection low on the page can sit behind the sheet. Scrolling it into view needs a smooth scroll-into-view on the frame protocol; the existing restore-scroll jumps instantly and locks scrolling for ~1s.
The sheet has no ✕ and no grabber, so swipe-down is the only exit — the one gesture VoiceOver and Switch Control users can't perform.
On a dark page, Liquid Glass shows page text through the sheet's bottom safe-area band. That band is outside the React view, so it can't be tinted from RN without a visible seam.
Quick replies dim once a draft exists, with no cue that clearing the field brings them back.