v0.20.1

Give a character different versions, and build a playlist

• Give a character different versions. Open a character and add a version, such as "Year 1" or "Grown up", with its own label and a short premise. A version starts from the base character and only the fields you change move away from it; the rest still updates when you edit the base. Pick a version when you start a personal story, in the roster of an existing one, or for a group character in a group's wizard or brief. Fields you don't want a version to carry can be excluded one at a time, falling back to the base. Deleting a version moves any story that was using it back to the base character. A character holds at most 100 versions.
• Develop a version with AI. A version can be filled out the same way a base character can, from the AI's knowledge or a web search, and the fields fill in one at a time as they come back instead of waiting for the whole sheet. A Stop button ends the run early with no charge.
• Background-music playlists. Add a track to a playlist from any music card on the Sound Library. The Sound tab of Settings manages your playlists: reorder, rename, delete, set a repeat count or turn on shuffle. The sound panel at the top right switches your active playlist and gets a Next button. A playlist plays only when nothing more specific does, below a story's or a theme's own music, and it stays on your device.
• Group achievements. Joining a group, putting your first story on a group's shelf, getting a brief suggestion accepted and creating a group each unlock a badge.
• A premium achievements section. Opening a Learning module, finishing a flash-card test, reaching 100 flash-card answers, playing an audiobook special, reading a comic special and reading a picture book in a translated language each unlock a badge of their own, shown in a section that only a premium account sees. The badges you already earned stay earned if your premium period ends, and the section comes back the moment it starts again.
• Statistics catch up with groups. The statistics page now counts groups, group stories, brief entries and accepted suggestions, group characters, passage rewrites, choice hints and more. A new Fellowship discovery track tracks joining and writing in groups, without changing any track or title you already hold.
• Course word tooltips in English don't repeat themselves. On a course where English is the language you're learning in, the word tooltip used to show the same English meaning twice. It now shows it once.
• Fixes. Saving a chapter you wrote yourself, with no AI generation involved, works again. A group's creator now gets credit for joining it, the same as anyone else who joins. The "Same story, new words" badge now unlocks the first time you open an already-translated picture book, not only while a fresh translation is still running. Saving a character version used to lose a develop's longer, list-shaped answers; those are kept now. The two flash-card quests and the "Story exported" achievement could never be earned. They unlock correctly now. Error-finding exercises now mark the exact wrong word. A correct tap is graded correct, and the feedback shows the corrected sentence as the Target. Feedback explains mistakes in plain language instead of internal terms. Chapter numbers on a Learning course page now agree with the chapter you open. A course you made can be switched between Private and Public. "Keep going" opens an existing public course for the next chapter instead of only offering to build a new one. A module answer submission that fails to reach the server can be retried without losing your answers. Group labels and brief chips are readable in dark mode now.
• Security hardening. This release tightens how uploaded images are decoded and served, and a few other internal checks.