st.page_link resolves paths from the directory of the entrypoint file
(src/gui/app.py), so the existing "src/gui/{page_slug}" prefix doubled
up and produced StreamlitPageNotFoundError on first upload + analysis
(reproducible on Windows; the stack trace from a Windows install
surfaced the bug).
The _TOOL_PAGE_PATHS map already stores the correct relative form
("pages/2_Text_Cleaner.py"); just pass the slug straight to
st.page_link.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Michael
e12615357d