Fix known bugs and improve version stability.

Fix known bugs and improve version stability.

- Teenager model supported.
- Known bug fixed.
- Fluency of APP optimized.

- Known bug fixed.
- Reading experience improved.
- Fluency of APP optimized.

1. Added the switch for automatic purchase of the next chapter to facilitate the management of your purchase.
2. Added the task of binding account to prevent the loss of your account.
3. Fixed the known bug to improve the stability of the version.

1. Genre module available to facilitate a book search.
2. More reading modes added, reading experience optimized.
3. Known bug fixed and stability improved.