Wires Message::StlExport's existing STLOUT command to the CMMS when
embedded, instead of the native save-dialog flow (which was already
non-functional on the web build regardless - handle_path() has no real
filesystem to write to there, a pre-existing upstream gap, not something
this touches).
- Cargo.toml: add the Location web-sys feature (needed for
window.location().set_href()).
- src/sys.rs: post_stl_export_to_host() - POSTs STL bytes as a new
attachment (cad_export_stl action, not cad_save/cad_save_new - STL isn't
in CAD_EDITABLE_EXT, it needs its own allowlist), then navigates the
browser straight to the CMMS's Kiri:Moto CAM page for the attachment it
just created. Splits cfg.job_id's "type:id" owner token apart to build
cam-edit.php's entity_type=/entity_id= params.
- src/app/mod.rs + update/mod.rs: CmmsStlExportResult message/handler -
only ever surfaces a failure (a success already navigated away).
- src/app/update/mod.rs: Message::StlExport gains a wasm32+embedded branch
that skips the file-picker entirely and calls the above directly.