Backend
- sidecar.rs supervises the bundled `mycelium` binary launched via
pkexec; locates it in resource_dir or CARGO_MANIFEST_DIR/binaries
matching $TAURI_ENV_TARGET_TRIPLE
- ephemeral port via portpicker, key + config persisted in
app_data_dir, kill_on_drop with explicit start_kill on stop
- health-check loop calls /api/v1/admin until 2xx (timeout 20s);
emits sidecar://ready and sidecar://exited
- 500-line ring buffer of stdout/stderr surfaced via sidecar_logs
command for the upcoming Settings page
- elevation::is_auth_failure(126|127) maps pkexec cancel to a
dedicated AppError variant
- AppError uses thiserror, Serialize impl renders messages as
plain strings for the JS side
Frontend
- typed `api` wrapper around invoke() in src/lib/api.ts
- node store (Pinia) bootstraps on mount, listens on
sidecar://ready and sidecar://exited
- StartupOverlay covers the whole window for idle/starting/error
phases; sidebar status dot + start/stop button
- Status view renders subnet, pubkey, api endpoint and key path
with one-click clipboard copy
