Implements Phase 3 of CARD_PLAN.md — the embedded:// + themes:// asset
sources the card-theme system loads from. The bundled default-theme
manifest ships in the binary via Bevy's EmbeddedAssetRegistry; user
themes load from user_theme_dir() through a FileAssetReader-backed
source registered as `themes://`.
Registration is split across:
register_theme_asset_sources(&mut App)
Called BEFORE DefaultPlugins. Registers `themes://` while
AssetSourceBuilders is still mutable.
AssetSourcesPlugin
Added AFTER DefaultPlugins. Populates the EmbeddedAssetRegistry
that AssetPlugin's build step would otherwise overwrite.
Constants exposed for downstream consumers:
USER_THEMES = "themes" (asset-source name)
DEFAULT_THEME_MANIFEST_URL = "embedded://solitaire_engine/assets/themes/default/theme.ron"
Includes a stub default theme.ron (52 face slots + back) so
`ThemeManifest::validate()` accepts it today; PROVENANCE.md documents
the plan to drop in real SVG art (hayeah/playing-cards-assets) in a
follow-up.
4 new tests covering source registration, embedded-registry
population, manifest validation against the embedded stub, and the
manifest-URL constant matching the embedded asset path.
cargo check --workspace --all-targets / clippy --workspace
--all-targets -- -D warnings clean. cargo test could not be run in
this turn because the C linker (cc) is unexpectedly absent from the
sandbox; the test bodies compile cleanly under cargo check --tests
and will run on a normal toolchain.
funman300
172d7773f0