Bundles this session's work plus the concurrent search/offline/player changes.
Every gate passes on the combined tree: 885 frontend tests, 610 Rust tests,
clippy clean, boundary clean, trace coverage 86%.
Offline video playback — four separate defects, each of which alone stopped it:
DR-133 A completed download's file_path is already absolute (the worker
rewrites it on completion), but the player rooted it a second time and
handed the webview /data/user/0/app//data/user/0/app/videos/x.mp4.
DR-134 The asset protocol was never enabled: no protocol-asset feature and no
assetProtocol config, so convertFileSrc produced URLs nothing answered.
Also silently defeated the cached-thumbnail path, which fails soft to
the server copy and hid it whenever the server was reachable.
DR-137 Tauri's asset protocol answers a range-less request by reading the
whole file into memory, and only advertises Accept-Ranges from inside
its range branch, so the first request never learns ranges exist.
Chromium gave up with PIPELINE_ERROR_READ after ~31s. Local media is
now served by a loopback HTTP server: bounded 4 MiB chunks streamed
from the file handle, every response length-delimited, and a range-less
request answered with one chunk rather than the file. Confined by a
per-session token and to the app data directory, because loopback is
shared between apps on Android.
DR-138 Release builds set usesCleartextTraffic=false, so Android rejected the
request to that server before any I/O. A network-security-config
exempts 127.0.0.1 only; a remote server must still be HTTPS.
Downloads:
DR-135 download_item never records media_type and the reconnect resolver read
that NULL as 'audio', so a movie queued from a media card had its URL
resolved by get_audio_stream_url and completed as an audio-only
transcode. The item's own type now decides.
DR-136 Rows already downloaded that way are requeued on reconnect, since
prevention alone leaves them reading "downloaded" and still unplayable.
Known limitation: a download taken at `original` quality is a byte copy of the
source, so it can be any container. One such file is an AVI holding XVID, which
the webview cannot play in any case — the media server serves it correctly and
Chromium refuses it. That needs either a transcoded download preset or the
native ExoPlayer surface work, and is not addressed here.
Also fixes two ID collisions between concurrent work: DR-143 defined twice
(search vs offline gate) and UT-131 defined twice (Episode Focus hero vs channel
cap). The search requirement is now DR-147 and the channel-cap test UT-141, with
their code references and matrix rows updated.
dtourolle
