BMD editor: editing, saving, and a real details UI - #382

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v2, actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The 'get' accessor of property 'Effect_v7.EffectStartTime' should use 'field' because the other accessor is using it.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

The 'get' accessor of property 'Effect_v2.EffectEndTime' should use 'field' because the other accessor is using it.

The 'get' accessor of property 'Effect_v2.EffectStartTime' should use 'field' because the other accessor is using it.

The 'get' accessor of property 'Effect_v1.EffectEndTime' should use 'field' because the other accessor is using it.