[Lingshan21]

Summary

Add priority swimlanes to the issue board so tasks can be scanned and reorganized by priority within each status column.

Changes

• Group tasks into urgent, high, medium, low, and none sections.
• Allow each priority section to be collapsed or expanded.
• Show counts and priority-aware visual indicators for each section.
• Allow changing a task's priority from its card indicator.
• Allow dragging cards between priority groups, including empty groups.
• Preserve task ordering and status-column drag behavior.

Verification

• node --test test/board-interactions.test.mjs
• npm run typecheck
• npm run build:web
• git diff --check

All checks passed. The local browser preview was started, but the isolated worktree had no companion backend data service, so real-data rendering was not available in that preview.

[jadon7]

感谢 @Lingshan21 提供优先级组织方案和初始实现。维护者后来将交互要求调整为“筛选菜单中的默认／名称／优先级排序”，不再使用状态列内的优先级分组和分组拖拽，因此最终实现由 #410 替代，已随 v1.1.23-beta.3 发布。

原方案贡献已在 #413 的实际文档提交中记录并添加共同作者署名；GitHub 已识别 Lingshan21，仓库 Contributors 页面也已实际显示该贡献。关闭此 PR 为已被替代，原始提交及贡献者分支保留，未改写历史。