Ark 0.5.2 — immediate Space page selection

Ark 0.5.2 removes the animation delay before a Space’s page appears.

• Clicking a Space or committing a sidebar swipe immediately selects and attaches its page while the sidebar finishes moving.
• Remove the old-page snapshot fade and queued Space requests that delayed content.
• Reuse existing WebKit pages, retaining document state; begin a never-opened page’s load immediately.
• Handle rapid reversals, cancelled previews, fresh gestures during settling, and split destinations.

All seven component and five packaged runtime suites passed, including 162 controller interaction checks. New regression checks require immediate destination attachment and verify retained document state, cancellation and split panes. Seven warm fixture switches measured 0.70 ms median / 2.01 ms maximum for synchronous host attachment; these are not screen-presentation measurements. The installed app passed signature/identity checks, retained all existing tabs and passed native Space-button checks. See VALIDATION.md for scope and remaining physical-input coverage.

This Apple Silicon development prerelease requires macOS 14 or newer and is locally signed, not notarized. Page loads still depend on the website and WebKit; this release does not claim a measured speed advantage over Arc.