Replaces the vertical EPG list with a shared horizontal `app-epg-timeline`
ribbon across all live surfaces (M3U player, unified live tab, Xtream, Stalker):
zoom, day navigation, short-programme grouping, catch-up/timeshift, and
per-state empty views. Backend gains timezone-aware `datetime()` comparisons,
unscoped source fallback, non-ASCII candidate matching, and chunked candidate
queries.
Timeline split into reusable, view-agnostic modules (archive/summary/dialog
service/render util/scroll controller) for the future EPG list view.
Fixes landed during review:
- honor the controlled `selectedDate` input (seed via linkedSignal)
- restore ribbon position across collapse/expand
- keep the ribbon mounted when scrolling across a gap day
- don't trigger block playback on Enter from nested watch/info buttons
- don't reset timeshift playback on the 30s now-tick during EPG gaps
Greptile 5/5 (safe to merge); Codex clean; CI green.
Swap M3 primary palette from violet to azure so checkboxes, radio
buttons, raised CTAs, and active states read as the same blue used by
the rail selection token. Cascading template + SCSS updates align the
remaining hand-rolled surfaces (Add Playlist dialog, VOD play button,
radio player, multi-EPG, empty-state CTAs) with the unified system.
LIVE stays red (broadcast role), cyan stays on EPG "now" indicator,
green stays on completed-download — semantic colors keep their meaning;
only the indiscriminate accent uses get folded into the blue primary.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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