Plex Live TV lost DVB subtitles when 2.10 moved the live path to HLS
(#1983): the transcode starts with subtitles=none, which drops a
tuner's bitmap subtitle streams from the output entirely - unlike
in-band CEA captions, they are separate elementary streams.
The tune response now surfaces the part's embedded bitmap subtitle
streams as selectable tracks in the player's subtitle menu. Picking one
points the part's server-side selection at that stream and rebuilds the
live transcode with subtitles=burn, preserving the time-shift position.
Off stays the default so tuner captions are never auto-burned (#1590),
and channels without bitmap streams keep the native track list. The
selection survives stream recovery by re-mapping onto the re-tuned
session's streams and resets on channel zap. Jellyfin live sessions
record subtitle selection as intentionally unsupported: their one
negotiated URL has no rebuild to deliver it through.
Consolidates duplicated logic behind shared implementations — paginated
grid tabs, focus chrome, cached remote stores, sheet selection columns,
the server artifact store and a test fixture layer — and removes code
that had become unreachable. Net reduction of about 5,500 lines with no
behaviour change.
Where a fix had landed separately in code that moved into a shared
helper, the fix was re-applied inside the helper rather than left behind
in the copy that went away.
Collapse duplicated setup across the suite into six shared helpers under
test/test_helpers/ and rewrite the 28 suites that were open-coding it:
http_fixtures.dart jsonResponse() for http.Response JSON stubs
library_tab_scaffold.dart pumps library tabs under their required ancestors
multi_server_fixtures.dart MultiServerProvider wiring for widget tests
playback_report_fakes.dart PlaybackReportCall + fake report sinks
profile_stack.dart production-shaped profile dependency graph
theme.dart testMonoTokens for fast-settling widget tests
Net -1245 lines with no change in coverage or assertions.
edde746