fix(convert): blank web page when converting multiple slides into HTML

[simanglam]

Fixes Issue

When manin-slides convert multiple slides into html, it add prefix to animation file in asset directory to prevent filename collision (as #428 mentioned) but doesn't add the prefix in HTML's reference to the file.

Description

I modified the HTML templates and pass prefix function to it.

Check List

Check all the applicable boxes:

• I understand that my contributions needs to pass the checks;
• If I created new functions / methods, I documented them and add type hints;
• If I modified already existing code, I updated the documentation accordingly;
• The title of my pull request is a short description of the requested changes.

Screenshots

Note to reviewers

See #496 also.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.96%. Comparing base (3b62e6b) to head (1fcbca7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #497      +/-   ##
==========================================
- Coverage   81.07%   80.96%   -0.11%     
==========================================
  Files          23       23              
  Lines        1886     1886              
==========================================
- Hits         1529     1527       -2     
- Misses        357      359       +2     

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[jeertmans]

Hi @simanglam, thanks for this PR! It looks all good, but could you add some words about this in the CHANGELOG?

[simanglam]

Hi @jeertmans, I've add some words about this in the CHANGELOG. Hope I didn't make any typo or grammar error.

[jeertmans]

Thanks! Small change requested :)

[simanglam]

Done!

[jeertmans]

Perfect, thanks @simanglam!