Fixes weekly email

[sebastiantf]

Description

Fixes issues with Weekly Email not being rendered properly on email clients.

Follow-up to #6438

Refers/Fixes

Testing

Before:

After:

Gmail Web:

Gmail Mobile:

[codecov]

Codecov Report

Merging #6534 into master will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6534      +/-   ##
==========================================
- Coverage   27.30%   27.29%   -0.01%     
==========================================
  Files         287      287              
  Lines       26801    26720      -81     
  Branches     3962     3946      -16     
==========================================
- Hits         7317     7294      -23     
+ Misses      19216    19159      -57     
+ Partials      268      267       -1     

Impacted Files	Coverage Δ
app/dashboard/router.py	36.04% <0.00%> (-4.03%)	⬇️
app/dashboard/models.py	50.26% <0.00%> (-0.04%)	⬇️
app/dashboard/views.py	11.12% <0.00%> (+0.08%)	⬆️
app/dashboard/embed.py	31.60% <0.00%> (+3.44%)	⬆️

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