Sync package to GitHub source: em-dashes out of rendered output; no API/logic change

v0.4.0 — hardened app (input/N caps, queue) + pinned dependency

Upgrade to Gradio 6.16.0

Pin huggingface_hub<1.0 (Gradio 4.44 needs HfFolder)

Pin Python 3.11 (audioop removed in 3.13)

synthkit Space v0.3.0 — grade + offline generate demo

initial commit