- Replace `.lock().unwrap()` with explicit error messages for poisoned MutexGuard
- Improve robustness against mutex poisoning in renderer, queue and event subsystems
Remove duplicate `play_from_queue`, ` play_next `,
`play_previous , and
``
pay _from_index implementations across all renderers (ArylicTcp, Chromecast,
LinkPlay , OpenHome UPnP) and instead provide default implementations in the
`QueueTransportControl `trait. Also introduce dispatch macros to simplify backend delegation for Transport/Volume control, and expose parse_didl_duration as public(crate).
Replace all `lock().unwrap()` calls on Mutex guards with explicit error messages using `.expect("... mutex poisoned")`. This improves robustness by providing clear diagnostics when a thread panics while holding the lock, preventing silent failures. Affected modules: events.rs (Renderer/MediaServer), all renderer backends, queue backend/implementation files. Also adds documentation to marker traits (HasQueue、 HasContinuousStream) and clarifies error handling in watcher loop with panic catching.
- Add `Hasqueue` trait and implement it for all renderers (Upnp, OpenHome, LinkPlay, ArylicTcp, Chromecast)
- Replace manual `QueueBackend` implementations with blanket impl for types implementing Hasqueue
(removes ~30+ duplicated methods across renderers)
- Fix BUG: `sync_queue` in UpnpRenderer now correctly propagates cancel_token instead of ignoring it
- Update version to 0.3.48 in Cargo.toml, lockfile and root file
- Add refactoring plan document (`refactoring_pmocontrol.md`) detailing remaining P1-P3 tasks
