fix(subtitles): preserve lyric selection and deduplicate secondary text

- Seek sidebar selections past overlapping karaoke exit spans
- Collapse duplicate long ASS lines and omit reconstructed sign grids

docs-site/mining-workflow.md

@@ -110,6 +110,8 @@ The secondary bar is a compact top-strip region in the same overlay window. It s
 
 It is controlled by `secondarySub` configuration and shares its lifecycle with the main overlay window. Cycle which track feeds it with `Shift+J`.
 
+SubMiner collapses duplicate ASS layers in parsed secondary tracks. Long lines repeated as dialogue and positioned signs are treated as the same line when they differ only in whitespace or terminal punctuation. Dense multi-row sign layouts, such as translated timetables, are excluded instead of being concatenated into the secondary bar. When SubMiner must use mpv's live text as a fallback, it still filters full-line duplicates while preserving short repeated dialogue.
+
 ### Display Modes
 
 Both the primary and secondary subtitle bars share the same three visibility modes, and each can be changed independently at runtime:

docs-site/subtitle-sidebar.md

@@ -9,7 +9,7 @@ The sidebar is enabled by default. Set `subtitleSidebar.enabled` to `false` if y
 When SubMiner parses the active subtitle source into a cue list, the sidebar becomes available. Toggle it with the `\` key (configurable via `subtitleSidebar.toggleKey`). While open:
 
 - The active cue is highlighted and kept in view as playback advances (when `autoScroll` is `true`).
-- Clicking any cue seeks mpv to that timestamp.
+- Clicking any cue seeks mpv into that line. For overlapping ASS karaoke, SubMiner moves past the previous line's exit animation when the selected cue has enough time remaining.
 - The sidebar stays synchronized with the overlay - media transitions and subtitle source changes update both simultaneously.
 
 For typeset ASS karaoke and animated signs, SubMiner collapses generated animation frames and repeated full-line color phases before they reach the sidebar. It recovers a clean complete line from a matching timed authoring comment or from full-line events surrounding generated fragments. Ordinary ASS comments, editor notes, alternate lines, repeated dialogue, and separately positioned signs remain distinct.