admin e578a90543 feat: collapsible hierarchical category tags + category sort for shelf ...

- Backend: add parent_category param (matches '历史-*' sub-categories),
  sort=category mode (ORDER BY category ASC), return category_tree with
  parent→sub→count hierarchy
- Frontend: replace flat 63-tag list with collapsible parent tags showing
  book counts, click parent to expand sub-category pills with fade-in
  animation, click sub to filter to exact category
- Add '分类排序' toggle button: when active, books are grouped by
  category with colored section headers showing category name + count
- Clicking same parent again collapses it; '全部' resets everything
- Mobile responsive: smaller tag sizes, reduced indent on narrow screens

2026-07-17 12:21:36 +08:00

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app.js

feat: collapsible hierarchical category tags + category sort for shelf

2026-07-17 12:21:36 +08:00