* pyi_generator: ignore `app.py` and single files
When running pyi_generator in pre-commit, it passes individual changed files on
the command line as targets, and these were not being properly excluded
according to the EXCLUDED_FILES list.
Add app.py to the EXCLUDED_FILES list so it does not get regenerated
automatically.
* [REF-2587] Ignore top-level theme appearance
From the Radix docs, it is not recommended to actually set `appearance`, but
instead use next-themes to set and switch the appearance dynamically.
Because Reflex already compiles the top-level theme into the next-themes
ThemeProvider, we can blank out the appearance prop after compiling contexts.js
to avoid a mismatch between the selected app appearance and the appearance in
the rx.theme when displaying overlay components.
Fix#2992
6ca5f48ae7