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.
local_album and the queue batch action carried byte-identical ~110-line copies
of the FFmpeg re-enrich apply+SAF-writeback+temp-cleanup flow (differing only in
helper names). Extract one applyFfmpegReEnrichResult() so the SAF temp-file
cleanup — the class of bug fixed in fb7d101 — has a single source. The
track-detail copy stays: it drives snackbars and does not preserve metadata.
zarzet