[kdroidFilter]

Summary

A new מראי מקומות pane lists the places that refer to the selected line: its REFERENCE and מסורת הש״ס links (both directions) and its עין משפט (Rambam, Tur, Shulchan Aruch…). None of these links were shown until now. The מקור pane is now drawn by the same view.

Both panes read like the search results:

• one card per book, its first passage cut around its quote of the line (the quote in bold), its other places behind "עוד N מקומות";
• filter tabs: עין משפט and מסורת הש״ס first, then by category (a category holding most books is split, e.g. תנ״ך → ראשונים / אחרונים). In מראי מקומות they show from 6 books; in מקור as soon as there are two categories;
• a click opens the book at that line.

Bereshit 1:1 has 164 places in 38 books: they become 38 cards.

Details

• One view, one loader (LinePlacesView, features/bookcontent/references) for both panes, on SeforimLibrary's new getReferencesForLines / getSourcesForLines (feat(dao): load a line's cross-references and sources with their books SeforimLibrary#138, submodule bumped).
• Shared with search: ResultRow, ResultTitle, SnippetText, FilterTabs are extracted from SearchResultScreen and used by both.
• Zoom: the results follow the text size in the panes and in the search list (LocalResultTextScale); tabs and status lines keep their size. A wide pane under the text lays its books out in columns (fewer when zoomed in).
• Headings: a daf or perek heading lists the places of its whole section, as the commentaries do; the rail buttons are enabled by the same lines.
• Performance: a passage's quote is found only for the passages on screen, off the UI thread, against the line it links to. Bereshit chapter 1 (31 lines, 412 places) loads in about 20 ms warm (263 ms before).
• Panes: panes docked beside the text sit side by side instead of stacking, and the panes follow the rail's button order by default.
• Removed: the legacy sources paging, the per-line "selected sources" state and the SOURCE branches of LineTargumView (about 400 lines).
• Session: showReferences is appended at the end of the persisted tab state (ProtoBuf field numbers); the now unused sources selections are kept for the same reason.

Testing

• New unit tests for the grouping, tabs, places and snippets (LineReferencesTest); the sources tests adapted.
• :SeforimApp:jvmTest: 1236 tests, 1 failure, WidgetSizesScreenshotTest, which also fails on master.
• detekt passes; ktlintCheck reports only the import order in E2eQuoteLinksScenario.kt, also failing on master.
• Run locally in the app; the zoom, the bottom-dock layout and the dark theme were not checked with screenshots.