0.18.3

SwiftTUI 0.18.3 fixes spinner task cancellation after selective list updates. It also includes the recent collection navigation, terminal input, state ownership, rendering, Windows image-loading, and host protocol fixes.

Fixed

• Cancel every spinner task when reduced motion is enabled, including untouched ForEach siblings after other rows tick independently. Preserve lifecycle ownership when a modifier reuses flattened content (STUI-1081).
• Open Unicode image filenames correctly on Windows, including file URLs and resource-root lookup, and recognize drive-rooted image paths.
• Recover list focus after measured row-height changes, preserve multiline table
  geometry, and restore native focus in direct outline lists. Thanks to
  @echoz for
  #57.
• Preserve precise collection scroll positions, final-row reachability, entity
  identity and selection eligibility; keep disclosure children, lazy viewport
  measurements, scroll chrome, and wheel-handler contributions consistent.
• Keep state, bindings, preferences, gesture state, navigation destinations,
  command boundaries, and hot-reload state attached to their declared owners.
• Reconcile accessibility and keyboard focus lifetimes, preserve default-focus
  intent, and carry presentation enablement independently of background input
  blocking. Menus and inherited content shapes retain their authored behavior.
• Unify incremental input decoding and quiet-period completion across terminal,
  WASI, and Windows readers; replay input consumed by terminal probes and
  preserve injected-input ordering through handoffs and EOF.
• Preserve secure text drafts, restrict reader clipboard access, and keep
  terminal output escaping, environment precedence, process boundaries,
  diagnostics, and host size negotiation consistent.
• Correct text and glyph boundaries, numeric-control precision, progress labels,
  animation arithmetic, path trimming, curve flattening, canvas coverage, and
  color conversion at boundary values.
• Preserve image sampling and half-cell coverage, GIF disposal lifetimes, JPEG
  orientation and decoding errors, signed paint bounds, border glyphs, and
  clip-aware damage. Deep paint traversal keeps stack-safe extents.
• Validate web protocol octets and host wire records, preserve wire failures and
  disconnected-host recovery, isolate hosted runs, and fix custom browser bundle
  resource paths and CLI option-presence handling.

Coordinated packages

• The SwiftUI host handles empty scene manifests without assuming a default
  scene (STUI-1071).
• Browser packages, Charts, Terminal View, native hosts, examples, the counter
  demo, and documentation move together to 0.18.3.