V4.6.0

What's Changed

1. 新增: 支持 gemini-3 系列的 thought signature (#3698)
2. 新增: 支持知识库的 Agentic 检索功能 (#3667)
3. 新增: 为知识库添加 URL 文档解析器 (#3622)
4. 修复(core.platform): 修复启用多个企业微信智能机器人适配器时消息混乱的问题 (#3693)
5. 修复: MCP Server 连接成功一段时间后，调用 mcp 工具时可能出现 anyio.ClosedResourceError 错误 (#3700)
6. 新增(chat): 重构聊天组件结构并添加新功能 (#3701)
7. 修复(dashboard.i18n): 完善缺失的英文国际化键值 (#3699)
8. 重构: 实现 WebChat 会话管理及从版本 4.6 迁移到 4.7
9. 持续集成(docker-build): 每日构建 Nightly 版本 Docker 镜像 (#3120)

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1. feat: add supports for gemini-3 series thought signature (#3698)
2. feat: supports knowledge base agentic search (#3667)
3. feat: Add URL document parser for knowledge base (#3622)
4. fix(core.platform): fix message mix-up issue when enabling multiple WeCom AI Bot adapters (#3693)
5. fix: fix anyio.ClosedResourceError that may occur when calling mcp tools after a period of successful connection to MCP Server (#3700)
6. feat(chat): refactor chat component structure and add new features (#3701)
7. fix(dashboard.i18n): complete the missing i18n keys for en(#3699)
8. refactor: Implement WebChat session management and migration from version 4.6 to 4.7
9. ci(docker-build): build nightly image everyday (#3120)