Add empty arrays for variables that could be undefined to prevent errors

[jardelgoncalves]

Added default empty arrays to handle cases where threads.value or comments.value might be undefined. This ensures that the code handles these situations gracefully and avoids potential runtime errors.

For threadsWithContext: Initialized with an empty array if threads.value is undefined.
For commmentsValues: Added a default empty array if comments.value is undefined.
These changes improve the stability of the code by preventing errors when accessing properties of potentially undefined values.

#53