[rigel-mintaka]

Summary

The scroll test's geometry stub now counts .conv-stream's vertical padding in scrollHeight (RIG-5818).

A browser's scrollHeight includes the scroller's padding. .conv-stream has 12px top and bottom (apps/ui/src/app.css). The stub returned only the sizer height, so its max scroll was 24px short. The scrollTop clamp from #2444 therefore stopped end-scroll writes early. The stub now adds the padding before flooring at clientHeight.

Test-only change, based on main (the virtual-core stack #2411, #2444, #2445 has merged).

Verification

• bun test --conditions browser src/components/ in apps/ui: 495 pass, 0 fail.
• moon run compass-ui:ci passes. biome is clean.

Risks

None at runtime. No current test asserts the exact bottom offset, so this corrects the fixture rather than turning a test red or green.

Compatibility

No change.

Documentation

None.

Ledger-impact: none (test fixture only)

[trunk-io]

😎 This pull request was merged.

[linear-code]

RIG-5818

[rigel-mintaka]

Review at head da29e34 (rebased onto main 23b79aa after the virtual-core stack merged): high 0, medium 0, low 2. Low 1 (setup comment still said scrollHeight = content height) is fixed in this head. Low 2 suggested asserting the stub's own scrollHeight. Not taken: that would test the fixture against itself, not any component behaviour. The reviewer confirmed the padding model (scrollHeight includes padding; clientHeight already does). Local: ChannelView tests 495/495, biome clean.

[github-actions]

Compass engineering docs preview: https://compass-native-rig-5818-scro.compass-eng-docs.pages.dev

Deployed from compass-native/rig-5818-scroll-stub-padding at 518092e.

[rigel-mintaka]

Review at head 518092e (rebased onto main after #2433's comment trims; took main's file and re-applied only the padding change, 7+/3-): high 0, medium 0, low 0 open. The earlier stale-comment low is gone, because #2433 removed that comment. Local: ChannelView tests 495/495, compass-ui:ci pass, biome clean.