feat: improve desktop reliability and customization

Address reliability and consistency gaps across Agent Runtimes, persistence, settings, Knowledge, Magic Notes, Smart Heartbeat, and the download site. Runtime processes now have bounded lifecycle cleanup and atomic configuration rollback, while model packages and persisted mutations recover safely.

Add a configurable global shortcut, protect unsaved work, improve modal and keyboard behavior, localize the built-in project without rewriting stored data, and lazy-load heavy renderer routes under enforced bundle budgets. Align project forms and disabled controls with shared typography and interaction states, and strengthen website release metadata validation and navigation accessibility.

Release note: 修复 Runtime、设置、知识库、魔法笔记与智能心跳中的可靠性和交互一致性问题；新增可配置全局快捷键，改进无障碍与加载性能，并强化官网下载校验。

docs/prd/task-and-job/README.md

@@ -12,5 +12,5 @@
 
 ## 阅读顺序
 
-先阅读统一领域模型。其他三份文档不得重新定义 Task、Conversation、Job、Run 或 Subagent。
+先阅读统一领域模型。其他功能文档不得重新定义 Task、Conversation、Job、Run 或 Subagent。
 若实现与文档出现冲突，应先修正统一模型，再同步功能 PRD。