v1.0.1 — Multi-column MVS fix

Fixed

• Multi-column splitting no longer breaks words containing MVS (U+180E) — column splitter now uses ASCII-only whitespace
• Block rendering no longer emits empty CSS declarations when attributes are blank
• Front-end CSS loads exactly once (block.json style field removed)

Docs

• Trilingual operating guide (EN / 中文 / Кирилл монгол) under docs/
• FONTS.md: font strategy — Noto Sans Mongolian v3.002 bundled (v1.0); Noto Serif Mongolian deferred until official release (v1.1)

⬇️ mongolian-vertical-text.zip = WordPress 安装包（后台 → 插件 → 上传安装）