* fix: stream gateway downloads to disk instead of slurping into RAM
Opening or saving a ~100MB MEDIA file OOMs the app: fetch() read the
whole response body into a single ByteArray (peak heap ~2x file size)
before writing it to cache. A 102MB docx (~97MiB) passed the server's
100MiB cap but blew the phone heap (192MiB growth limit) on both open
and save.
fetch() now streams the body to a cache file in 64KiB chunks and
GatewayFile carries the written file instead of bytes; save copies the
cache file to the destination chunked. Cancellation-safe (partial file
deleted, CancellationException never swallowed), UUID-named cache
files, 24h sweep.
Closes#913
* fix: stub app.cacheDir/applicationContext in attachment tests
The streaming fetch builds File(cacheDir, ...) from the application
context's cacheDir; the affected tests never stubbed it, so the mock
returned a bogus File (null path) and java.io.File's constructor NPE'd
before fetch was even called. Stub cacheDir + applicationContext
(returning app itself, matching the existing success-path test) in the
five open/save tests. copyChunked is also stubbed to copy for real in
the save-writes test since mockkObject mocks the whole object.
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Co-authored-by: M57 <hy4ri@users.noreply.github.com>
