iwb_canvas_engine 1.0.0

iwb_canvas_engine: ^1.0.0 copied to clipboard

Breaking #

• Finalized the v2 public API in basic.dart/advanced.dart around immutable snapshots, specs, and patch semantics.
• Removed the legacy mutable public surface from package entrypoints.

Added #

• Stable interactive runtime aliases: SceneController and SceneView over v2 implementations.
• Strict JSON v2 codec contracts (schemaVersion = 2) with canonical validation errors via SceneJsonFormatException.
• Bounded render caches and spatial-index optimizations for interactive performance.
• Expanded automated validation with parity, regression, invariant coverage, and import-boundary checks.

Changed #

• Hardened scene invariants: unique node ids, single canonical background layer, explicit constructor/decoder canonicalization.
• Improved input transactional behavior for move/draw/eraser flows, including cancel safety and monotonic event timelines.
• Improved rendering consistency and parity for selection visuals, text line-height semantics, and thin-line snapping behavior.
• Refreshed package documentation (README, API_GUIDE, ARCHITECTURE) for the 1.0.0 release baseline.