Port the pinned Material quantizer and Dart RNG compatibility to Rust while keeping Material Score and final color schemes in Dart. Include exact palette fixtures, licenses, and Kotlin worker ABI coverage.
Handle feature and featured separators across display, Android finalization and Rust tag writing. Split conjunction credits only when separate artist IDs confirm them, and offer a picker for multi-artist navigation.
Android's regex engine rejects Pattern.UNICODE_CHARACTER_CLASS, so NativeFinalizationPolicy failed to initialize and every native download crashed while writing metadata. List Unicode spaces explicitly and cover the separator with a device test.
Native tag writers accept artist_tag_mode=primary and keep only the first credited artist in ARTIST and ALBUMARTIST for every format: FLAC download embedding, FLAC/Opus edits, and the ID3, MP4, APE and RIFF writers. The Android finalizer's FFmpeg fallback applies the same rule.
Rust and Kotlin share one separator set (comma, semicolon, ampersand, a spaced x, feat/ft/featuring/with) and test the same fixtures. The Go-parity split_vorbis pattern is unchanged. Refs #618.
Preserve romanization and translation metadata through Rust exports and cache, match rounded line times, and retain word endings. Highlight romanization with the main lyric clock in Material and Mornye.
Clear selection overlay ownership safely when collection screens are disposed. Add parser, rendering, cache and overlay lifecycle regression coverage.
Replace the Go backend with the Rust workspace and route Android/iOS through
UniFFI bindings. Include the migrated extension runtime, network, providers,
media metadata, downloads and library operations, with version 5.0.0+147.
Remove Go sources, adapters, native build selection and CI dependencies.
Build Rust unconditionally and lock the iOS Rust pod using a relative path.
Retain legacy source and migration evidence in a local ignored archive.
Validation: Android Kotlin compile and 53 native tests; Swift Rust-branch
equivalence and syntax; CocoaPods install; workflow, shell, Ruby, plist and
diff checks. Reuse the preceding 100 Rust tests, fmt/Clippy and five-ABI
build checkpoint; no new APK or iOS application build for this cleanup.
Known follow-up: URL/URLSearchParams globals are missing from the Rust JS
runtime. A controlled extension replay confirms a URL-resolution regression;
this commit does not fix that runtime gap.
Propagate filesystem errors from complete metadata reads so Android retries unreadable SAF descriptors through temporary files while accepting valid audio without tags.
Keep established segmented and chunked transfers outside the resolution allowance. Continue charging initial requests, retries, and progress callbacks, including during parallel native reads, while preserving stall cancellation.
Add metadata, transfer, and native fallback regression tests. Validated with Go tests, race detector, vet, Android tests, targeted Flutter tests, analyzer, and formatting checks.
Trim after removing inline timestamps before matching speaker prefixes in Dart. Run one 21-case usability corpus through Dart, Go, and Kotlin tests.
Document the shared fixture and trigger Dart and Go CI when its resources change.
Remove the activity-wide descriptor failure flag and centralize direct-read/fallback handling. A pipe, revoked URI, or malformed file no longer disables direct metadata reads for subsequent files.
Test fallback isolation, descriptor cleanup, and a successful direct read after a failure.
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