fix: group drag cross-track maintains relative track offsets

Each item computes its own target track as srcIdx + crossOffset. Items from different source tracks land on different target tracks, preserving the group's vertical layout shape.
2026-07-29 10:52:50 +07:00
parent 12d2639455
commit 9c3a435f26
3 changed files with 66 additions and 12 deletions
@@ -736,3 +736,9 @@
 - **Các file ảnh hưởng:** `app/static/js/app.jsx`
 - **Ghi chú/Test (nếu có):** `npm run build` — build passes.
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+### [2026-07-29 10:55] Task: Fix group drag cross-track — each item keeps relative track offset
+- **Tóm tắt thay đổi:** Khi drag group cross-track, mỗi item tính target track riêng dựa trên `srcIdx + crossOffset`. Item trên track 1 kéo xuống 2 track → đến track 3. Item trên track 2 kéo xuống 2 track → đến track 4. Không gộp vào 1 track.
+- **Các file ảnh hưởng:** `app/static/js/app.jsx`
+- **Ghi chú/Test (nếu có):** `npm run build` — build passes.
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