1.25.9 — natural voices recover from a cut download, starter pack no longer shipped

Very natural voices (Kokoro): a model download cut short left a file that failed to load every time after, and the natural voices were gone until the models folder was deleted by hand; the file is now dropped and fetched once more. Contributed by @neondragon (#3). The starter pack is no longer shipped: ⚙ → Characters offers the drawn characters (default), the cat pack and your own folder. Plus everything from 1.25.8: inner thoughts for agents at work, and your own lines always voiced. Full list in CHANGELOG.