how to include an undergraduate thesis on a cv

(b) If I should, how would I go about doing so? How to site it? Host and provide link?
merely an analysis / reformulation of an existing, proved theorem

Research experience is a valued activity in the educational experience and should be showcased on your resumé. This experience should be treated like any other experience, whether paid or unpaid, as it provides a snapshot of skills and knowledge you have gained.
When highlighting your research, be sure to use key words that highlight skills employers want. Example statements include:

References:

http://nau.edu/undergraduate-research/adding-research-to-a-resume-cv/
http://library.leeds.ac.uk/dissertation-examples