Personallised typing staticstics in timeline

The user should have a page where he can see:
- wps and accuracy in timeline graph
- how many time he spent typing (overall, last month, last week)
- how many words he typed correctly (overall, last month, last week)
- how many words he typed incorrectly (overall, last month, last week)

Start by surveying the existing application structure and any current typing or timeline views; the issue names no files, entry points, or tests. Define how the page will present WPS and accuracy over time, typing duration, and correct and incorrect word counts for overall, monthly, and weekly periods, then verify each requested statistic and time range is represented.

Written by the indexing model from the issue text.