Files
ChatApp/apps/desktop
byGalax 48ac9d2922 feat(livekit): rust SDK scaffold behind rust-livekit feature flag
Phase B.1 of the native-livekit migration. Ships the command surface and
event bridge behind a cargo feature so the default build stays unaffected
while the JS-SDK path keeps running in production.

Rust side
- livekit 0.7 (default tokio runtime, rustls-tls-native-roots) pulled as
  an optional dependency; tokio also optional under the same feature
- Feature `rust-livekit` gates everything — off by default; on via
  `cargo build --features rust-livekit`
- src-tauri/src/livekit_bridge.rs: LivekitState mutex, connect /
  disconnect / send_data commands, event pump for room_state,
  participant_joined, participant_left, data_received
- Mic / camera / screen share commands stubbed with explicit
  "not implemented" errors so JS callers fail loudly rather than
  silently no-op

JS side
- src/lib/nativeLiveKit.ts exposes a NativeRoom class with the same event
  / method shape the CallContext will need, plus a VITE_USE_RUST_LIVEKIT
  flag so the adapter can be swapped once the bridge reaches parity
- isRustLivekitAvailable() gates access at both env + runtime layers

Build impact
- Baseline build unchanged (1s incremental, no new deps pulled)
- Feature build initial: ~10min (libwebrtc download + link)
- Feature build incremental: ~1s
- Binary size with feature: +12-20MB vs baseline

Open questions (documented for the next phase)
- Video-frame rendering bridge remains an upstream gap; livekit-rust
  exposes NativeVideoFrame but no stable path to expose that as a
  MediaStreamTrack inside the WebView
- Audio-only rust path is realistic near-term; full-rust needs either
  upstream video-bridge or a native-overlay render window
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@chat-app/desktop

Tauri v2 + React + Vite + Tailwind desktop client (macOS / Windows / Linux).

Prerequisites

  • Node 22+, pnpm 9+
  • Rust + Cargo (install via https://rustup.rs)
  • Platform build deps:
    • macOS: Xcode Command Line Tools
    • Linux: libwebkit2gtk-4.1-dev, build-essential, libssl-dev (Debian/Ubuntu)
    • Windows: Microsoft C++ Build Tools + WebView2

Dev

# from repo root
pnpm install
pnpm desktop:dev      # tauri dev — launches Vite + native window
pnpm desktop:build    # production bundle per platform

Layout

  • src/ — React app (Vite bundles into dist/).
  • src-tauri/ — Rust backend. main.rs wires Tauri plugins.
  • vite.config.ts — port 1420, HMR on 1421, aliases to shared packages.

Secure Storage

Session tokens + user private keys live in Stronghold (tauri-plugin-stronghold). Local message history lives in SQLite (tauri-plugin-sql), DB file encrypted at rest.