Create api/mod.rs with API router and webauthn router construction.
Create app/mod.rs with page router and static asset handlers. Rewrite
routes/mod.rs to combine api::router() + app::router(). Widen
support.rs load_*_options visibility to pub(in crate::application::routes).
Split each mixed file along the api/page boundary:
- account.rs: page handler + view types to app/, API handlers to api/
- checkin.rs: checkin_page to app/, submit_checkin to api/
- webauthn.rs: register_page + cli_callback_page to app/
Move entity CRUD modules (roasters, roasts, bags, brews, gear, cafes,
cups), pure API modules (tokens, backup, scan), macros, and webauthn
to routes/api/. Remove page handlers from api/webauthn.rs. Update
import paths (super::support:: to crate::, scan's TastingNotesInput
reference to super::roasts::). Widen pub(super) to
pub(in crate::application::routes) on page loaders and data structs
for cross-subdirectory access.
