Add a liveChannelListMode setting (default 'grouped') with a Settings
toggle to display the Live TV channel list flat, without category
group sections. When enabled, logical channels are listed directly
with their stream variants still grouped as in #9/#10. Cover the
setting default and flat-list behavior with tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add a channelVariantGrouping service that normalizes channel names
(strips region prefixes and quality tokens) to fingerprint duplicate
stream entries and cluster them under a single logical channel with
quality/source variants. Wire it into the Live TV channel list and
player variant selection, reducing duplicates without destructively
merging streams.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
