[Andreas-Garcia]

Summary

ZoomControls now defaults to orientation="horizontal". Every consumer already uses the horizontal layout (app-kit-ui, grow's GenealogyChart), so the vertical default only forced them to pass the prop. This is the first step of making the controls single-orientation in genre-tree-view.

Changes

• ZoomControls.tsx: default orientation is "horizontal"; the prop is kept, so orientation="vertical" still works and explicit "horizontal" callers are unaffected.
• CHANGELOG.md [Unreleased]: Changed entry. Behavior change for callers relying on the old default, so the release is a minor (0.11.0).

Test plan

• pnpm build
• pnpm lint (tsc --noEmit)
• No automated test: the package has no test runner (pnpm test prints "no tests yet"), so the default is not covered by a test.

🤖 Generated with Claude Code

[Copilot]

🟢 Approval recommended

The diff is a minimal, self-consistent default change with rendering logic that correctly handles both orientation values and an accurate CHANGELOG entry, leaving no outstanding issues.

No open issues 🎉

What changed in this PR

This PR changes the ZoomControls primitive in @behindthemusictree/ui so that orientation defaults to "horizontal" instead of "vertical". Since every current consumer already passes orientation="horizontal", the old vertical default only forced them to set the prop explicitly. The prop itself is retained, so orientation="vertical" still produces the column layout. This is a small, backward-compatible-at-the-API-level step toward simplifying the controls in genre-tree-view.

Changes:

• Default orientation for ZoomControls is now "horizontal" (prop kept, so "vertical" still works).
• Added a ### Changed entry under [Unreleased] in CHANGELOG.md documenting the new default and how to restore the column layout.

File	Description
packages/​ui/​src/​ZoomControls.tsx	Flips the default value of the orientation prop from "vertical" to "horizontal"; rendering logic already supports both.
CHANGELOG.md	Documents the default-orientation behavior change under [Unreleased] > Changed.

_{Review effort: Balanced}