Academic Notes 2.8.0

• Fix appearance dropdowns reopening after selection while retaining settings scroll position.
• Add linked Proof-of-theorem/lemma/claim headers and separate-line empty Proof headers.
• Add a commutative diagram editor (Beta): 2x2/3x3 grids, native math labels, solid/dashed arrows, label placement and undo. Diagrams are stored as editable note code blocks.
• Add optional TikZJax templates and SVG export integration, with completion checks and isolated glyph references.
• Keep figure groups and captions together in PDF and proportionally fit oversized images. Preserve source order without LaTeX float reordering.
• Expand English and Chinese documentation, examples and screenshots.

Validation: 15 Node tests, mobile bundle loading, browser/CodeMirror interactions, real MathJax rendering, 39 palette cases and native PDFs under default, Phycat and Minimal styles. Cross-chapter links and print-window isolation remain covered. Physical iPad acceptance and the actual optional TikZJax compiler remain separate checks.

The three installation assets are built by GitHub Actions and include artifact attestations.