v0.3.1 — Article reader 3-column layout + tab/AI-chat fixes

v0.3.1

Article reader

• Each article tab now uses a 3-column reader layout (Markdown | Chat | PDF)
• Per-tab chat history persisted to tab.data.chatHistory
• #pdf-embed renamed to .article-pdf-embed so multiple tabs own their own iframe without ID collisions
• Library/AI chat panel correctly hidden on settings + article tabs in pywebview/Edge WebView2

Settings & LLM

• DeepSeek defaults updated: deepseek-v4-flash / deepseek-v4-pro (v4-flash as default)
• LLM Provider pane: protocol select (OpenAI 兼容 / Anthropic 兼容) + per-model 1M-context checkbox
• Document-parsing API keys (DocParser, DocMind, 云 OCR, 云知声 U1) all support a 👁 eye toggle in settings

Installer

• NSIS installer auto-detects settings/data path persistence across updates
• Portable zip artifact: 42 MB
• NSIS installer artifact: 33 MB