ToWrite Open Questions 0.2.4

• Switched the settings page to Obsidian's getSettingDefinitions() API and kept the heading on Setting#setHeading.
• Raised the 0.2.4 minimum Obsidian version to 1.13.0 to match the new settings API.
• Cleaned the frontmatter export write path to avoid unsafe assignment warnings.
• Wrapped the edit modal submit handler so it no longer returns a Promise where Obsidian expects void.
• Switched PDF overlay timer calls back to window.requestAnimationFrame/setTimeout per Obsidian review guidance.
• Renamed the selection toolbar document field to avoid the popout compatibility warning.

中文摘要：

• 设置页切换到 Obsidian 新的 getSettingDefinitions() API，并继续使用 setHeading。
• 0.2.4 的最低 Obsidian 版本提升到 1.13.0，以匹配新设置 API。
• 修复 frontmatter 写入、弹窗 Promise、PDF timer、选区工具条字段名等审核 warning。