fix(client): address remaining conversation review feedback

.agents/notes/implemented/architecture/2026-08-09-client-conversation-node-assembly.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-08-09-client-conversation-node-assembly.md
-2026-08-09-client-conversation-node-assembly.md: 9952f8fac0f2a3b0fe72cc97ae9a8fb4f96ace08
-2026-08-09-client-conversation-node-assembly.zh.md: f27a82459cdacdb4a2da27cf12b30c93f2dfdf64
+2026-08-09-client-conversation-node-assembly.md: 16a39539064644e5467f701789a7e2ef1f7ff172
+2026-08-09-client-conversation-node-assembly.zh.md: 0e0fbdf8f3320393022528e6e3fe2cf0d492a1d3

.agents/notes/implemented/architecture/2026-08-09-client-conversation-node-assembly.md

@@ -394,6 +394,8 @@ History-path tests cover complete replace, non-overlapping prepend, overlapping-
 
 A new business node can register its matcher, State transitions, optional Location data, final target Node, and renderer locally without changing Session's business switch. `ChatNodeDataMap` and the Location data maps let a business package merge strongly typed data into the contract; every related Event must still expose a stable ID derivable from that Event alone.
 
+Host business packages declaration-merge their durable Event members into `@deepseek-ai/dsh-session/types`, while Client Definitions type-only import the corresponding business package `/types` subpaths. Augmenting the declaring interface rather than a re-export barrel gives the independent Host and Client TypeScript programs the same Event narrowing without pulling Host runtime into the Client graph.
+
 Initial tail, older prepend, and live append share one set of Context invariants. Missing starts, Reader window gaps, unknown Locations, and high-frequency deltas are explicit engine states and require no direction-specific business cache.
 
 Append does not scan historical Contexts; prepend replays only Contexts whose Matches, Locations, or Reader answers actually changed. A structural Chat change may still recompute visible order and indexes, but does not rerun unrelated business folds or replace unchanged Node identity.

.agents/notes/implemented/architecture/2026-08-09-client-conversation-node-assembly.zh.md

@@ -394,6 +394,8 @@ Assembled Web snapshot、GUI 和浏览器场景覆盖真实 plugin graph。浏
 
 新增业务节点可以局部注册自己的 matcher、State 转换、可选 Location data、最终 target Node 和 renderer，不再修改 Session 的业务 switch。`ChatNodeDataMap` 和 Location data maps 允许业务 package 通过 declaration merging 合入强类型 data；所有相关 Event 仍须暴露可单 Event 推导的稳定 ID。
 
+Host 业务 package 把自己的持久 Event 成员 declaration-merge 到 `@deepseek-ai/dsh-session/types`，Client Definition 则通过对应业务 package 的 `/types` 子路径进行 type-only import。增强实际声明接口而不是重导出 barrel，使 Host 和 Client 的独立 TypeScript Program 都能获得相同的 Event narrowing，同时不把 Host runtime 带入 Client 图。
+
 初始尾页、older prepend 和 live append 共享一套 Context 不变量。缺 start、Reader window gap、Location unknown 以及高频 delta 都是引擎明确表达的状态，不需要业务另建方向相关 cache。
 
 Append 不扫描历史 Context；prepend 只 replay Match、Location 或 Reader 答案真正受影响的 Context。Chat 结构变化仍可能重算 visible order 和索引，但不会重跑无关业务 fold 或替换未变化 Node identity。