Books results from NLB API may have missing values

[cliffchew84]

Description:
Some results from SearchTitle and GetTitles may not return all expected data. This includes results with no title or no author. Although this does not cause the app to crash, it causes the user's saved books to have blanks, which is a weird user experience.

Possible next steps:

1. Capture which APIs may return missing when they occur
2. Either consider a logic to exclude them from being shown at search or being saved into the user's saved books.

[kiritowu]

Currently when a user visits an unavailable resource, they will be shown a 404 page. But if they like a book on the /search page, the button will just dont work.

Ideally a message pop-up should appear to warn the user that "book is unavailable".

Again, this issue of "phantom" book causes a huge UX issue and needs to be addressed one way or another.

[kiritowu]

Added toast status raise any error if found for better user interaction