Traffic plot improvement

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Original issue by mateusccoelho on 2023-08-27 03:27:32+00:00

1. Initialize the traffic counts with yesterday is not right because it's misleading. If one doesn't know how the package works, he/she will think that the first day had no visitors.
2. If the computer running the Streamlit server is in a negative timezone, altair/javascript will parse dates wrong and "shift" dates by -1 day. This Stack Overflow thread explains the issue.

See plot below to visualize the two problems:

Notice the first day is 0 and that the counting started in 27th august, but there are no pageviews in this day.

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@mateusccoelho is this still relevant?

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@mateusccoelho I believe this is the current design that the first days metrics are not in the middle of the screen.
It starts from the previous day to make a relative comparison and to show the increase or decrease for the days afterwards
I do agree that this could be misleading.

This will be resolved once we introduce more granular timestamp data as requested in #31
Marking this issue as resolved - duplicate and planned work.
Please share insights and comments on #31