Changes
- Home Sync button: BLE suspended for WiFi, opens WiFi selection if no saved credentials, shows Đồng bộ OK/Lỗi feedback
- silentRefresh: uses HTTP to avoid TLS heap issues on ESP32-C3
- OTA fix: matches any .bin asset name, strips v prefix from version tags
- Chicken pet: default pet type with pixel art sprites for all stages
- Pet type selection: large sprite preview alongside type list
- Reading stats sleep screen: per-book reading time and progress bars
- Anti-ghosting: pre-clear blank frame for stats sleep screen