Platform lifecycle source provenance

The optional crates/platform services adapt the preserved local platform candidate
9b135779a1e7136438a217c18afe1693ea23f1ab (dialog outcomes and browser resource ownership),
and current application implementations:
- PdfCraft crates/platform/src/desktop_theme.rs, a8cd797a917b1007544575c7280c9a0ce6a17e8f.
- CADCraft apps/cadcraft/src/desktop_theme.rs, 0cc66ad3066e71f2c3d4cacb7de905e79ba1c95b.
- ArtCraft Launcher apps/artcraft-launcher/src/system_theme.rs, f1676dfb41c226b5be490721f486ee6427419d80.
- Earlier PhotoCraft, FilmCraft and EffectCraft appearance services at revisions
  0c72d95425dece90ef9a1cceb49e3315c96e22d5, 794a25fc9ed2e3f6fab51a254625bc9b99a88015
  and 1b4d47f34f2b1c1b4a89f4b7348889def8fd648b respectively.
Sources: https://github.com/storytold/pdfcraft, https://github.com/storytold/cadcraft,
https://github.com/storytold/craft-launcher, https://github.com/storytold/photocraft,
https://github.com/storytold/filmcraft, https://github.com/storytold/effectcraft.
Copyright (c) 2026 ArtCraft Team and the respective application and craft-libs contributors.
All adapted source is licensed MIT OR Apache-2.0.
