chore: bump version to 4.14.7

changelogs/v4.14.7.md

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+## What's Changed
+
+### 修复
+- 人格预设对话可能会重复添加到上下文 ([#4961](https://github.com/AstrBotDevs/AstrBot/issues/4961))
+
+### 新增
+- 增加提供商级别的代理支持 ([#4949](https://github.com/AstrBotDevs/AstrBot/issues/4949))
+- WebUI 管理行为增加插件指令权限管理功能 ([#4887](https://github.com/AstrBotDevs/AstrBot/issues/4887))
+- 允许 LLM 预览工具返回的图片并自主决定是否发送 ([#4895](https://github.com/AstrBotDevs/AstrBot/issues/4895))
+- Telegram 平台添加媒体组（相册）支持 ([#4893](https://github.com/AstrBotDevs/AstrBot/issues/4893))
+- 增加欢迎功能，支持本地化内容和新手引导步骤
+- 支持 Electron 桌面应用部署 ([#4952](https://github.com/AstrBotDevs/AstrBot/issues/4952))
+
+### 注意
+- 更新 AstrBot Python 版本要求至 3.12 ([#4963](https://github.com/AstrBotDevs/AstrBot/issues/4963))
+
+## What's Changed
+
+### Fixes
+- Fixed issue where persona preset conversations could be duplicated in context ([#4961](https://github.com/AstrBotDevs/AstrBot/issues/4961))
+
+### Features
+- Added provider-level proxy support ([#4949](https://github.com/AstrBotDevs/AstrBot/issues/4949))
+- Added plugin command permission management to WebUI management behavior ([#4887](https://github.com/AstrBotDevs/AstrBot/issues/4887))
+- Allowed LLMs to preview images returned by tools and autonomously decide whether to send them ([#4895](https://github.com/AstrBotDevs/AstrBot/issues/4895))
+- Added media group (album) support for Telegram platform ([#4893](https://github.com/AstrBotDevs/AstrBot/issues/4893))
+- Added welcome feature with support for localized content and onboarding steps
+- Supported Electron desktop application deployment ([#4952](https://github.com/AstrBotDevs/AstrBot/issues/4952))
+
+### Notice
+- Updated AstrBot Python version requirement to 3.12 ([#4963](https://github.com/AstrBotDevs/AstrBot/issues/4963))