v0.1.5: sidebar playlist tree auto-scrolls when dragging near its edges

TASKS.md

@@ -3,6 +3,25 @@
 Legend: `[ ]` todo · `[~]` in progress · `[x]` done.
 When a round closes, move its finished items to `tasks-done.md`.
 
+## Round 24 — sidebar drag auto-scroll (v0.1.5)
+
+Tests in `tests/test_round24.py`. Fix round → patch bump **0.1.5**.
+
+Dragging a playlist near the top/bottom edge of the sidebar tree scrolled
+nothing: `PlaylistTree.dragMoveEvent` fully overrides the base implementation,
+so Qt's built-in autoscroll (in `QAbstractItemView.dragMoveEvent`) never ran —
+the same root cause Round 13 fixed in the track table. Ported that machinery
+(`autoscroll_direction` shared from `track_table`, 40 ms timer, one unit per
+tick) into `PlaylistTree`. Playlist moves keep the scroll live at the edge
+even over non-folder rows (the tree always accepts an internal move
+somewhere); track drags gate on hovering a real playlist row, matching the
+drop-target highlight, and the highlight re-tracks the row under a held-still
+cursor as it scrolls.
+
+- [x] `lintunes/gui/sidebar.py` — `_update_autoscroll` / `_autoscroll_tick` /
+      `_stop_autoscroll` wired into `dragMoveEvent`, `dragLeaveEvent`,
+      `dropEvent`.
+
 ## Round 23 — playback-control provenance log (v0.1.4)
 
 Tests in `tests/test_round23.py`. Diagnostic round → patch bump **0.1.4**.