v0.28.0

[0.28.0] - 2026-06-09

In-place demo body layout and an effect_glass companion to
effect_panels.

Changed

• Demo body contract (BREAKING) — mirui::gallery::demos::*::build_widgets signs as (world, parent[, ...]) and returns (); mutates parent.Style in place. setup_app(app, parent) returns ().
• mirui::gallery::demos::effect (BREAKING) — renamed to effect_panels.

Added

• mirui::gallery::demos::effect_glass — MirrorOf + animated BackgroundBlur over a 4-tile grid (128×128 viewport).
• gallery/examples/effect_glass_demo.rs — desktop runner for effect_glass.

Removed

• mirui::gallery::demos::attach_to_parent — no callers after the demo body contract change.

Internal

• gallery/web/src/lib.rs rewired to setup_app(app, parent).
• gallery/src/lib.rs re-exports mirui plus ActiveSurface / ActiveFactory.
• tests/gallery_demos.rs covers effect_panels and effect_glass smoke tests.
• tests/gallery_demo_render_snapshot.rs renders 41 demos and asserts ≥ 3 distinct quantized colours per frame; four demos carry #[ignore] because their first frame depends on multi-frame state evolution.
• Six unused import warnings under no_std builds resolved by gating Theme, ease, SimAction / SimTimeline / sim_timeline_system, and alloc::vec behind #[cfg(feature = "std")].