fix: reduce supervisor stalls and preserve task delivery

Load Supervisor graphs only when opened, preserve source details on demand, reuse indexed story digests and window selection lists without losing keyboard or focus behavior. Route heavy UI reads through the existing worker, batch scoped queries and construct each publication snapshot once.

Keep remote cancellation responsive during model-route cleanup, remove late routes and retain reported usage after response-cap cancellation. Preserve Telegram pending replies through polling conflicts, show delivery errors and honor the final rate-limit cooldown.

Schema 62 adds lookup indexes without rewriting user content; older clients cannot open upgraded data. Large review publication still blocks Main and remains documented follow-up work. Record the future storage-service direction without performing the architecture migration.

Validation: exact staged code passed isolated full tests (6212 passed, 87 skipped), typecheck and lint. Three-round source performance comparisons, SQLite migration equivalence, native Electron interaction checks and current-source Linux x64 Host validation completed; eight external text-model requests.

Release note: Supervisor opens reviews without loading the entire graph, keeps long selection lists responsive and preserves details and keyboard navigation. Remote cancellation and Telegram reply recovery are more reliable; remote fixes require an Agent build containing this change.

docs/features/conversation-supervision/README.md

@@ -24,6 +24,7 @@
 | [回顾分块调度设计](./review-scheduling-design.md) | 第 0 节定义生产分页、批次持久化、续跑、当前设置及剩余边界；其余章节保留改造前基线、目标设计和原型证据 |
 | [故事线模型改造设计](./storyline-model-design.md) | 全局 › 项目 › 功能 › 子线索的故事层级、故事归属与经验抽取阶段、用户调整及实施顺序（目标设计） |
 | [实施进度](./progress.md) | 已验证实现、验证证据和当前边界 |
+| [Renderer 修复与测量](./frontend-progress.md) | K01、K03、K04 的界面回归、源码 Electron 对照及测量限制 |
 | [故事线图谱设计](../story-graph/prd.md) | 图谱对象、环绕时间轴与实体交互 |
 
 生产入口已接通完整来源分页、叶子持久化、持续处理至完成、活动页主动暂停/继续及批次详情；设置可调页大小、批次正文/消息上限、单次响应容量、两个模型超时和共享并发。实际合同及限制见[生产接线](./review-scheduling-design.md#0-生产接线与剩余边界)。真实 DeepSeek 验证已覆盖一个完整的 27 条消息会话；较早的 129 条消息实验仍未完成。两次实验共 5 次付费请求，详情见进度。原始 AbortError 原因尚未由日志确定。