Two defects with one cause: "server only" was a private $derived inside MediaCard. The list view (what LibraryGrid renders when the stored view preference is list) had no notion of it at all, so a library browsed as a list offline showed every revealed item as an ordinary tappable row that plays nothing, with no way to queue it. And the rule asked the downloads store whether *this item id* was downloaded — but only a playable leaf (Audio, Movie, Episode) ever has a download row. An album's tracks carry them, the album does not, so a fully downloaded album greyed itself out and offered to queue what was already on the device. The rule moves to the pure $lib/utils/serverOnly and both views call it. The container half is answered by the backend rather than guessed at: get_download_disk_usage().sizes already carries container subtotals beside leaf sizes (DR-085), so deviceContentIds is membership in a Rust-computed map, not a frontend list of which item types are containers. That map was loaded only by the Downloads page, so the shell primes it at startup and re-reads it whenever the offline gate settles. Queueing is shared too, since the list view had no copy to diverge from. TRACES: UR-052, UR-055 | DR-292 | UT-257, UT-258

JellyTau
A cross-platform Jellyfin client built with Tauri, SvelteKit, and TypeScript.
Business logic lives in a Rust backend; a UI-rich Svelte frontend handles presentation and talks to it over Tauri's IPC. Targets Linux (libmpv) and Android (ExoPlayer).
Getting Started
This project uses bun as its package manager.
# Activate the Rust environment (fish shell)
source "$HOME/.cargo/env.fish"
# Install dependencies
bun install
# Run in development
bun run tauri dev
# Type-check the frontend
bun run check
# Build for Linux
bun run tauri build
# Build for Android
bun run tauri android build
For the full set of build, test, and Android helper scripts, see scripts/README.md.
Documentation
| Topic | Location |
|---|---|
| Architecture overview & subsystem docs | docs/architecture/ |
| Requirements, traceability & technical debt | docs/requirements.md |
| Build & release process | docs/build/build-release.md |
| Docker builds | docs/build/docker.md |
| Traceability tooling & CI | docs/traceability.md, docs/traceability-ci.md |
| Release checklist | docs/release-checklist.md |
| UX flows | docs/ux-flows.md |
| CI operations (builder image, secrets, runner) | docs/build/ci-operations.md |
Contributing
CONTRIBUTING.md covers the setup, the gates a change has to pass, and the two rules that catch people out (bug fixes start with a failing test; Jellyfin's taxonomy stays in Rust). Please also read the Code of Conduct.
Found a security problem? Do not open an issue — see SECURITY.md.
Verifying a download
Every release publishes SHA256SUMS covering all of its artifacts, plus an SBOM
of what went into the build:
sha256sum -c SHA256SUMS
Desktop builds update themselves from Settings → Updates, verifying each payload against JellyTau's signing key before installing. Android installs are handled by the system installer, so the app links to the releases page instead.
Recommended IDE Setup
VS Code + Svelte + Tauri + rust-analyzer.
License
MIT