refactor(agent-loop): drop the steering/message session event
Steer, inject, and followup now land as durable user/message events on the session surface; the steering/message event type and its ConversationNode kind are removed from the client projection. Update tests, docs, generated catalogs, and agent notes to match, and align the steering e2e fixture and prompt inventory assertions with the durable user/message landing.
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_Kerman
@@ -15,7 +15,7 @@ Two problems:
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## Decision
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Injected session content projects verbatim; the caller owns any framing. `deriveEventMessage` renders `user/message`, `context/message`, and `steering/message` through one shared case returning `{ role: 'user', content: event.data.content }`; their content blocks reach the model unchanged. `context/message`'s `source`/`meta` and `steering/message`'s `turn` stay in the durable event log but do not render.
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Injected session content projects verbatim; the caller owns any framing. `deriveEventMessage` renders `user/message` content blocks to the model unchanged; `source` stays in the durable event log but does not render.
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The `ContextEnvelope` type and every `envelope` field are removed — `context/message` in `SessionEventMap`, `InjectOptions`, `HookContext`, and the `inject()`/`additionalContexts` plumbing in `dsh-agent-loop`. `workspace-context` no longer requests `'raw'`; its self-framed content renders as before. The `renderTagged`/`renderContextEnvelope` helpers are deleted. `context/message.meta` still carries durable, model-hidden JSON state.
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@@ -15,7 +15,7 @@ Status: implemented
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## 决策
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注入的会话内容逐字投影，框架由调用方自行负责。`deriveEventMessage` 通过一个共享分支渲染 `user/message`、`context/message` 和 `steering/message`，都返回 `{ role: 'user', content: event.data.content }`；它们的内容块原样到达模型。`context/message` 的 `source`/`meta` 和 `steering/message` 的 `turn` 保留在持久事件日志中，但不渲染。
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注入的会话内容逐字投影，框架由调用方自行负责。`deriveEventMessage` 把 `user/message` 的内容块原样送达模型；`source` 保留在持久事件日志中，但不渲染。
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`ContextEnvelope` 类型和所有 `envelope` 字段都被移除——包括 `SessionEventMap` 中的 `context/message`、`InjectOptions`、`HookContext`，以及 `dsh-agent-loop` 中 `inject()`/`additionalContexts` 的相关管线。`workspace-context` 不再请求 `'raw'`；它自带框架的内容渲染方式不变。`renderTagged`/`renderContextEnvelope` 辅助函数被删除。`context/message.meta` 仍携带持久的、对模型隐藏的 JSON 状态。
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@@ -6,7 +6,7 @@ English | [中文](2026-07-31-web-ui-no-steer-entry-or-interjection-chrome.zh.md
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## Problem
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Mid-turn steering is a host/agent-loop capability (`mode:'steer'`, durable `steering/message`). The Web product already locked the composer while a turn runs and never shipped a queue/steer menu, yet the client still threaded `'queue' | 'steer'` through the input machine, `conversation.send`, and locale keys, and rendered consumed steering as a badged 「插话」/「Interjection」 bubble. That left a half-built UI surface: an unused submit mode, a product label for a gesture users cannot perform, and e2e goldens that pinned chrome the product does not own.
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Mid-turn steering is a host/agent-loop capability (`mode:'steer'`, a durable `user/message`). The Web product already locked the composer while a turn runs and never shipped a queue/steer menu, yet the client still threaded `'queue' | 'steer'` through the input machine, `conversation.send`, and locale keys, and rendered consumed steering as a badged 「插话」/「Interjection」 bubble. That left a half-built UI surface: an unused submit mode, a product label for a gesture users cannot perform, and e2e goldens that pinned chrome the product does not own.
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## Decision
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@@ -14,7 +14,7 @@ Keep host and runtime steering intact. Remove only the Web UI entry and chrome:
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- `InputMachine` / `SessionInput` / `InputActions.submit` / hub `defaultSink` are queue-only; they always call `session.prompt(..., 'queue')`.
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- `ConversationService.send(text)` drops its mode argument and always queues.
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- `MessageItem`'s `steering` arm still folds durable `steering/message` content into a plain right-aligned bubble (no badge, no user IconActions) so external/host steers stay visible on replay.
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- Durable steer content renders as a plain right-aligned bubble (no badge, no user IconActions) so external/host steers stay visible on replay.
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- Delete `message.steering` locale strings and the unused badge CSS.
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- The web steering e2e still POSTs `mode:'steer'` over `/api/session.prompt` and asserts durable + model-visible obedience; it no longer expects interjection chrome. Update [web input machine note](../architecture/2026-07-25-web-input-machine-and-slash-pipeline.md) fact lines to match.
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@@ -6,7 +6,7 @@ Status: implemented
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## 问题
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中途 steering 是 host／agent-loop 能力（`mode:'steer'`、持久 `steering/message`）。Web 产品已在 turn 运行中锁定 composer，且从未交付排队／steer 菜单，但客户端仍把 `'queue' | 'steer'` 穿进 input machine、`conversation.send` 与 locale 键，并把已消费的 steering 渲染成带「插话」／「Interjection」徽章的气泡。这留下半成品 UI：用不到的提交 mode、用户做不到的手势却有产品文案，以及把产品并不拥有的 chrome 钉死在 e2e golden 上。
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中途 steering 是 host／agent-loop 能力（`mode:'steer'`、持久 `user/message`）。Web 产品已在 turn 运行中锁定 composer，且从未交付排队／steer 菜单，但客户端仍把 `'queue' | 'steer'` 穿进 input machine、`conversation.send` 与 locale 键，并把已消费的 steering 渲染成带「插话」／「Interjection」徽章的气泡。这留下半成品 UI：用不到的提交 mode、用户做不到的手势却有产品文案，以及把产品并不拥有的 chrome 钉死在 e2e golden 上。
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## 决策
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@@ -14,7 +14,7 @@ Status: implemented
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- `InputMachine`／`SessionInput`／`InputActions.submit`／hub `defaultSink` 仅 queue；始终调用 `session.prompt(..., 'queue')`。
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- `ConversationService.send(text)` 去掉 mode 参数，始终排队。
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- `MessageItem` 的 `steering` 分支仍把持久 `steering/message` 内容折成右对齐普通气泡（无徽章、无用户 IconActions），以便外部／host steer 在回放时仍可见。
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- 持久 steer 内容渲染为右对齐普通气泡（无徽章、无用户 IconActions），以便外部／host steer 在回放时仍可见。
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- 删除 `message.steering` locale 字符串与未使用的徽章 CSS。
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- web steering e2e 仍通过 `/api/session.prompt` POST `mode:'steer'`，并断言持久化与模型可见服从；不再期望插话 chrome。同步更新 [web input machine note](../architecture/2026-07-25-web-input-machine-and-slash-pipeline.md) 中的事实行。
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