feat: add supervisor workspace and traceable story graph

Extend the existing heartbeat workspace with scoped work reviews, result-specific story graphs, source inspection, and pinned conversation or task feedback. Connect confirmed continuation and local knowledge entity previews through the desktop APIs, and preserve result history and user corrections in schema 43.

Include focused regression tests, an isolated visual fixture, and implementation evidence. Full event-by-event replay, Experiment targets, no-change handling, and cancellation remain incomplete; this commit does not claim complete feature acceptance. Existing automatic plans remain active when the application entry is disabled.

Release note: Review work progress in the Supervisor workspace, trace graph events to saved sources, and open a matching review from pinned conversation or task feedback.

UI-DESIGN.md

@@ -147,7 +147,8 @@
 | --- | --- | --- | --- |
 | `reading` | `820px` | 连续阅读、单列编辑、对话撰写 | 聊天正文与输入区 |
 | `standard` | `960px` | 常规列表与表单 | 最近对话 |
-| `dashboard` | `1040px` | 指标、卡片网格、宽表格与审计数据 | 智能心跳、活动记录 |
+| `dashboard` | `1040px` | 指标、卡片网格、宽表格与审计数据 | 活动记录 |
+| `supervisor` | `1440px` | 选择列表、图谱画布、来源详情三栏工作台 | 监督者（含智能心跳设置） |
 | `master-detail` | 可用空间内流式铺开 | 左侧选择、右侧编辑或预览 | 知识库 |
 
 共同规则：
@@ -701,7 +702,7 @@ GoodBuddy 是可调整窗口大小的桌面应用。响应式设计优先保证
 
 ### 13.4 智能心跳
 
-- 使用 `dashboard` 壳层。
+- 监督者入口使用 `supervisor` 壳层；智能心跳设置位于同一壳层内。
 - 顶部先呈现运行状态、实际范围和主操作，再呈现指标、建议、历史与配置。
 - 范围明确区分 Global 与指定的一个或多个 Project；Global 与指定项目互斥，多项目选择使用
   Checkbox，不能依靠进入页面时的当前项目推断。