Fix display issues with broken border or characters from the previous line not being cleared

[Nogesma]

I managed to find the reason why sometimes the borders get broken, or we have a character from a line that still gets displayed. This is the same issue as #298 (comment).

I think this only happened on kitty, and maybe foot, because this came from the fact that ratatui and most other terminals were calculating the width of the \u{e0000} character incorrectly.

This character is used by twitch clients like chatterino to bypass twitch duplicate message timeout, so it can appear quite frequently.

My fix is to just remove it from the message as it is not meant to be rendered.

It is possible that there are some other discrepancies between ratatui and different terminals, so there could be some other unicode characters that will display the same rendering issues, but I haven't seen any for now.

This PR is independent of the other 2 I have, so you can merge it whenever you want.

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (3c426e9) 6.24% compared to head (fa3d97c) 7.32%.

Files	Patch %	Lines
src/twitch/mod.rs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #532      +/-   ##
========================================
+ Coverage   6.24%   7.32%   +1.08%     
========================================
  Files         39      39              
  Lines       4114    4161      +47     
========================================
+ Hits         257     305      +48     
+ Misses      3857    3856       -1     

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[Xithrius]

Oh man, I've been trying to solve this issue ever since scrolling was implemented in the main chat window (probably around a year or so ago, and it may have existed even before then).

I'm so glad you were able to find a fix, I'll test this on my machine later today.

Thank you so much!

[Nogesma]

Haha it was a tricky one to find. I switched the debug! of the twitch message to print the debug version of the cleaned_message string, so that it will actually display invisible unicode characters, which should hopefully help us find any other similar issue in the future, should they arise.

I also noticed there is still a few rendering issues when emotes are enabled, probably something to do with spans starting/ending with zero-width spaces, but this is already fixed in #529, so I won't fix it here.

[Xithrius]

Beautiful. I don't get any artifacts in streams with any kind of traffic. Thank you!

[Xithrius]

available in https://github.com/Xithrius/twitch-tui/releases/tag/v2.6.3