Multi-Agent Studio v1.7.7.2

中文

本次为纯修复，无新增功能。

• PDF → Markdown 乱码与假表格：矢量图里的文字常来自 Visio/Word 子集字体（ArialMT、TimesNewRomanPSMT 等），这些字体没有 Unicode 映射，任何提取器都只能得到 !"#$%&' 这类乱码。现在按「字体族 + 字母数字占比」识别图内文字，改为输出一条 > [图内文字无法可靠提取，已省略（图形区域文字缺少 Unicode 映射）] 占位，不再输出乱码；被图形框线误判成表格的图区也只留占位，不再生成假表格。
• 数学公式符号还原：LaTeX 的 txfonts（txex / txsyc 等）同样缺少 Unicode 映射，此前 ∑ 会变成 X、≠ 会变成 ,、矩阵括号变成私有区字符或 (cid:N)。现在按 PDF /Differences 的字形名还原：∑、≠、⎡⎢⎣⎤⎥⎦、[] / () 均可正确输出；同时保留 pdfminer 的空格标注，避免整行单词粘连（AdversarialFiltering...）。
• 版面清理：自动剔除页脚与页码；双栏页面按「左栏读到底再读右栏」重排（不再左右交错）；合并行尾连字符（Evasion at-\ntacks → Evasion attacks）。
• Markdown 安全：表格单元格转义 $ _ * ` [ ] ~ & < > # 等字符，并在表格块之间留空行，避免转换出的 $...$ 被前端 texmath 当作公式、渲染出 KaTeX ParseError。
• 升级方式不变（按 README「版本迁移」覆盖文件）；本次不涉及配置或数据库迁移。

English

This is a fix-only release with no new features.

• PDF → Markdown garbage and fake tables: text inside vector figures often comes from Visio/Word subset fonts (ArialMT, TimesNewRomanPSMT, …) with no Unicode mapping, so every extractor can only produce garbage such as !"#$%&'. Figure text is now detected by "font family + alphanumeric ratio" and replaced with a single > [figure text could not be extracted reliably, omitted] placeholder instead of garbage; figure regions whose borders were mistaken for tables also become a placeholder rather than a fake table.
• Math glyph recovery: LaTeX txfonts (txex / txsyc, …) also lack Unicode mappings, so ∑ used to come out as X, ≠ as ,, and matrix brackets as private-use characters or (cid:N). They are now restored from the PDF /Differences glyph names: ∑, ≠, ⎡⎢⎣⎤⎥⎦, [] / () all render correctly; pdfminer's space annotations are preserved so words no longer fuse into AdversarialFiltering....
• Layout cleanup: page footers and page numbers are dropped; two-column pages are reordered as "read the left column to the bottom, then the right column" (no more interleaving); end-of-line hyphenation is joined (Evasion at-\ntacks → Evasion attacks).
• Markdown safety: table cells escape $ _ * ` [ ] ~ & < > # and table blocks are separated by blank lines, so a converted $...$ is no longer treated as a formula and rendered as a KaTeX ParseError.
• Upgrading is unchanged (see README "Version migration"); this release has no config or database migration.