In order to have all the relevant information for displaying a truth everywhere, add
its week number.
Fetch it during the week rendering and use it for the link back.
Users might want to share specific truths, or it might be useful to link to them in the future.
Set the id of the h3 element for each truth to its number in the week and add an anchor link to
the full h3 element, to be able to click anywhere.
Update the stylesheet to hide the link color and decorations, add animation an hover color as
with the week navigation arrows.
Now that the application is going to have multiple pages, vote data makes no sense
to keep with the user.
The user struct will be used everywhere to check for authentication, which is not
the case for previous votes.
Create a new struct and function in src/vote.rs to retrieve existing votes and
use them in places where user.votes was used previously.
Remove vote-related code from src/auth.rs and the week number dependence that it
required.
The index is a full HTML page with some boilerplate that would be needed in all
pages deviating from the truth list, specifically the head and general structure.
Make the core structure a base template, rebuild the week index page inheriting
from it.
Change which template is used by the route accordingly.
