Fix config validation and animation lifecycle

[RockerFlower]

Summary

• Adds runtime validation for layer lengths, durations, height percentages, and gradients.
• Makes SingleConfig and RandomConfig render with sensible defaults while keeping existing CustomConfig usage compatible.
• Improves WaveWidget animation lifecycle handling, including updates and non-looping animations.
• Adds Flutter 3.7 CI, FVM version metadata, tests, and README/CHANGELOG notes.
• Excludes deployment and IDE metadata from the pub.dev package with .pubignore.

Why

The package exposed SingleConfig and RandomConfig, but only CustomConfig rendered. CustomConfig also missed gradient length validation, which could fail later during paint/build with a range error. The widget lifecycle kept animation state in a way that could become stale across widget updates.

Compatibility

This is intended as a non-breaking bugfix. The existing Dart SDK constraint remains unchanged, and CustomConfig keeps its existing constructor shape and nullable public fields.

Validation

• flutter pub get
• flutter analyze
• flutter test
• flutter pub publish --dry-run
• GitHub Actions: CI passed
• GitHub Actions: Deploy Workers Static Assets PR build passed
• git diff --check

[vercel]

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Project	Deployment	Actions	Updated (UTC)
wave	Error		Jul 8, 2026 4:41am