MTG Python Deckbuilder v2.5.2

Summary

Builder responsiveness upgrades: smarter HTMX caching, shared debounce helpers, and virtualization hints keep long card lists responsive.
Commander catalog now ships skeleton placeholders, lazy commander art loading, and cached default results for faster repeat visits.
Deck summary streams via an HTMX fragment while virtualization powers summary lists without loading every row up front.
Mana analytics load on demand with collapsible sections and interactive chart tooltips that support click-to-pin comparisons.

Skeleton placeholders accept data-skeleton-label microcopy and only surface after ~400 ms across the build wizard, stage navigator, and alternatives panel.
Must-have toggle API (/build/must-haves/toggle), telemetry ingestion route (/telemetry/events), and structured logging helpers capture include/exclude beacons.
Commander catalog results wrap in a deferred skeleton list while commander art lazy-loads via a new IntersectionObserver helper in code/web/static/app.js.
Collapsible accordions for Mana Overview and Test Hand sections defer heavy analytics until they are expanded.
Click-to-pin chart tooltips keep comparisons anchored and add copy-friendly working buttons.
Virtualized card lists automatically render only visible items once 12+ cards are present.

Commander search and theme picker now share an intelligent debounce to prevent redundant requests while typing.
Card grids adopt modern containment rules to minimize layout recalculations on large decks.
Include/exclude buttons respond immediately with optimistic updates, reconciling gracefully if the server disagrees.
Frequently accessed views, like the commander catalog default, now pull from an in-memory cache for sub-200 ms reloads.
Deck review loads in focused chunks, keeping the initial page lean while analytics stream progressively.
Chart hover zones expand to full column width for easier interaction.