mtg_python_deckbuilder/docs/releases/v4.5.2.md

MTG Python Deckbuilder v4.5.2

Summary

Adds hover-intent prefetch for the Open Deck button on the Finished Decks page, reducing perceived load time when navigating into a deck view.

Added

Hover-intent prefetch (WEB_PREFETCH=1)

Hovering over an "Open" button on the Finished Decks page now prefetches the deck view in the background after a 100 ms delay. When you click, the page loads from the browser's prefetch cache rather than waiting on a network round-trip — making it feel near-instant.

• Off by default; enable with WEB_PREFETCH=1
• Respects Save-Data header and slow (2G) connections — no prefetch on metered/slow connections
• Limits concurrent prefetches to 2
• Speculation Rules API infrastructure included for future side-effect-free GET routes
• Cache-Control: private, max-age=30 added to /decks/view when flag is enabled

Configuration

Variable	Default	Description
WEB_PREFETCH	0	Set to 1 to enable hover-intent prefetch on the Open Deck button