Align the Settings label with the old Flutter wording and port the 19 existing settingsAboutShareLogs translations. The subtitle was new text with no prior translation, so drop it rather than ship an untranslated string.
Albums/Artists/Playlists were new keys because the old Flutter strings
were plurals, so their translations went unused. Take the `other` form of
resourcesAlbumName/resourcesArtistName/resourcesPlaylistName into the three
plain-string resources for the 26-27 locales that translated them. Arabic
`resources_album_name` and Hungarian `resources_playlist_name` stay English
because their upstream `other` form is empty.
- AddSourceViewModel resolves SubsonicException.uiMessage too, so malformed/
HTTP/truncated responses show localized text instead of the raw parser
message; add a regression test.
- StringResourcesTest now requires an 'other' quantity in every plural and
asserts exact placeholder (index and conversion) equality, both of which
could previously pass while crashing getQuantityString at runtime.
- Map the pre-enum song_downloads.error sentences back to their DownloadError
so existing failed rows keep their specific message.
- Localize the media-session star/unstar button label.
- Remove 12 unreferenced resources (queue name, filter year, sync_failed, and
the unused codec_* strings; codec labels stay in AudioEncoding).
- Make buildTree's fallback arguments required; only tests used the defaults.
Move every exposed UI string into res/values/strings.xml (+ plurals) and
read it via stringResource/pluralStringResource or getString, with 27
locale files carried over from the Flutter app's Weblate translations.
Only strings whose English is unchanged reuse an old translation; reworded
ones get fresh keys.
Persisted download failures become a DownloadError enum mapped to string
resources (stored by name, unknown legacy values degrade to Failed), the
per-app locale config is generated by AGP, and StringResourcesTest guards
locale keys and placeholders.
austinried