Opt-in live preview for dub segments: edits debounce into a streamed /ws/tts synthesis played through the chunk player, with cancellation preserved through buffered playback. Maintainer fixes: /ws/tts added to the backend ticket allowlist (feature was dead off-loopback), handshake failures surface a toast, loopback-only plaintext refusal reverted to keep the documented remote-GPU setup working, PCM16 decode hardened. Thanks @mvanhorn!