feat: add multi-terminal workbar and resizable sidebars

The assistant workbar now uses persistent application tabs with a permanent catalog entry point and supports multiple local or managed SSH terminals bound to the current project. Terminal sessions flow through the Main, preload, and renderer boundaries with bounded output, resize, lifecycle, and cleanup behavior.

The main sidebar and Magic Notes list now support pointer and keyboard resizing. Magic Notes can also hide and restore its list, remembers the chosen layout, and stacks its panes when the available width is narrow.

Closing a terminal tab ends its Shell session. Restored terminal tabs do not restart prior Shell processes and require an explicit reconnect.

Release note: 助手工作栏现可通过“+”打开多个本机或当前远程项目终端；主侧栏和魔法笔记列表支持拖拽调宽，魔法笔记列表可隐藏并记住布局。

docs/README.md

@@ -10,6 +10,7 @@ GoodBuddy 文档按“文档类型 → 功能域”组织。新增文档应先
 | Task 与 Job | [Task 与 Job 总览](./prd/task-and-job/README.md) |
 | Smart Heartbeat | [智能心跳 PRD](./prd/smart-heartbeat/smart-heartbeat-prd.md) |
 | 助手工作栏 | [通用助手工作栏与执行空间 PRD](./prd/assistant-experience/assistant-workbar-and-execution-spaces-prd.md) |
+| 工作栏终端 | [助手工作栏多终端页签 PRD](./prd/assistant-experience/workbar-terminal-tabs-prd.md) |
 | 会话监督 | [会话监督 PRD](./prd/supervision/conversation-supervision-prd.md) |
 | 记忆 | [分区记忆 PRD](./prd/memory/partitioned-memory-prd.md) |
 | 并行实验 | [并行实验工作台 PRD](./prd/experiments/parallel-experiments-prd.md) |
@@ -35,9 +36,8 @@ GoodBuddy 文档按“文档类型 → 功能域”组织。新增文档应先
 - [全双工实时语音交互设计](./architecture/full-duplex-voice-design.md)
 - [DeepSeek Harness Runtime 设计](./architecture/deepseek-harness-runtime-design.md)
 - [应用内反馈系统设计与对接](./architecture/in-app-feedback-integration-design.md)
-- [SSH 远程主机与 GoodBuddy Agent 稳定终态设计](./architecture/remote-host-and-goodbuddy-agent-design.md)
+- [SSH 远程主机与 GoodBuddy Agent 实现说明](./architecture/remote-host-and-goodbuddy-agent-design.md)
 - [SSH Host 远程环境准备与控制面直连设计](./architecture/remote-host-environment-provisioning-design.md)
-- [跨平台助手产品设计](./design/cross-platform-assistant-product-design.md)
 - [长期助手路线图](./roadmap/long-term-assistant-roadmap.md)
 - [产品、性能与体验综合改进计划](./roadmap/product-performance-experience-improvement-plan.md)
 - [电脑控制实施状态](./status/computer-control-implementation-status.md)