Korean vocabulary, TOPIK words

- Fixed duplicate images and incorrect stroke-count data in Chinese character stroke-order learning. - Fixed a low-contrast issue on disabled checkbox labels in light theme. - Fixed a low-contrast issue on disabled round buttons in light/dark theme.

- Made auto-advance behavior and the answer info layout consistent on the answer panel. - Fixed example-based quizzes so the speaker reads the example sentence instead of the word. - Polished example pronunciation to sound like a single, natural utterance and resolved partial cut-offs in playback. - Fixed a crash when entering the unit screen via an unintended route. - Mitigated an iOS crash where a network-status callback reached a torn-down engine when the app moved to the background. - Hardened against rare crashes in speech recognition, pronunciation, ads, and drag interactions.

- Made auto-advance behavior and the answer info layout consistent on the answer panel. - Fixed example-based quizzes so the speaker reads the example sentence instead of the word. - Polished example pronunciation to sound like a single, natural utterance and resolved partial cut-offs in playback. - Fixed a crash when entering the unit screen via an unintended route. - Mitigated an iOS crash where a network-status callback reached a torn-down engine when the app moved to the background. - Hardened against rare crashes in speech recognition, pronunciation, ads, and drag interactions.

- Auto-advance now has three modes: off, always, or correct answers only. - Auto-play voice on entering listening review quizzes; disabled on the read-aloud example review quiz. - Fixed part list progress not updating immediately after applying a sync download. - Fixed an iOS regression where pronunciation playback stopped external music. - Fine-tuned the iPad header safe-area offset.