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/remote-host/technical-design.md

@@ -371,6 +371,12 @@ Runtime 包。2026-09-19 完整桌面验证覆盖联合包安装、CN 项目创
 阶段。实现规则见[共享进程与 Session 所有权](../assistant-workbar/runtime-process-reuse-technical-design.md#61-连接与所有权)，
 本次源码 Host 验证及调用计数见[统一执行进度](../unified-execution/progress.md#2026-10-05-runtime-生命周期审查修复)。
 
+同日 K07 补齐模型路由准备后的取消：broker 关闭及终态提交保持原顺序，原生路由
+撤销的 HTTP 等待移出全局控制队列。安装晚于取消完成时，以捕获的 transport、Session
+和 operation 再次撤销该路由；原生 helper 只删除 operation 匹配的项。路由 HTTP 请求
+仍有 10 秒上限，transport 退出或释放时中止未完成请求。当前源码的 OpenCode／Continue
+实机证据见[局部修复验证](../unified-execution/progress.md#2026-10-05-k07k08-局部修复)。
+
 ## ACP 与断线
 
 - 管控面只负责有界 JSON-RPC：连接、查询、启动、取消、关闭和重连。数据面只负责