''Review supported by Claude Code''
Control flow logic was scrutinised, and a race identified
in the solution to pass on the display action to the GUI thread.
Reconsidering the design, cross-thread synchronisation is now
hinged rather on a single atomic buffer pointer, where the GUI
thread notifies back completion of display work by setting that
pointer to NULL. Overall this simplifies the control logic
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As an aside, I setup an outline of topics for documentation in `DemoSpec.txt`
and then instructed Claude to fill in the paragraphs, based on insight gained
as part of the code validation / review. Furthermore, I requested to generate
some diagrams that could be useful later when preparting the presentation
