Allow selecting multiple files on Android, desktop, and iOS and share them
as one transfer through the core multi-source path. Update the composer UI
for multi-file review, hide unfinished iOS receive methods, and surface
refusal reasons on the receivers list.
Default Android receive destination is now the shared system Downloads
collection (like desktop), using MediaStore on API 29+ instead of
app-private storage. Legacy app-private defaults are promoted back to
public Downloads so existing installs pick up the fix.
Android emulated storage rejects hard-link commit even when canWrite()
reports success. Fall back to exclusive rename for publish, probe real
writes during folder validation, and label the default app downloads dir
clearly so it is not confused with shared system Downloads.
Tighten cold-open and in-app invitation handling so ticket acquisition is
stricter and less racey across hosts, and expand automated coverage for the
receive history and acquisition flow before merge.
This adds DeviceInfo to the Platform interface and implements it for Android, iOS, and JVM, including battery level and active network summary where available.
Co-authored-by: Junie <junie@jetbrains.com>
