refactor(client): expose loopback state through connection

.agents/notes/implemented/feature/2026-07-30-versioned-gui-welcome-onboarding.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/feature/2026-07-30-versioned-gui-welcome-onboarding.md
-2026-07-30-versioned-gui-welcome-onboarding.md: 1199cec532dd23930c70b236e6fcac80832204ff
-2026-07-30-versioned-gui-welcome-onboarding.zh.md: d59e8971689fad1836127fea79cd392d3d5787c3
+2026-07-30-versioned-gui-welcome-onboarding.md: 4707769d4fa9fbf184e09a2e73087dfd326070be
+2026-07-30-versioned-gui-welcome-onboarding.zh.md: c9d2e6274c476c59abc077aa3255ffe57a8a48bc

.agents/notes/implemented/feature/2026-07-30-versioned-gui-welcome-onboarding.md

@@ -14,7 +14,7 @@ The GUI's credential onboarding begins with a DeepSeek-specific readiness check,
 
 **Ownerless product onboarding belongs to `ui-settings-general`.** `src/onboarding-copy.ts` is the single editable source for the complete notice, the Continue label, and `WELCOME_NOTICE_VERSION`; both supported GUI locales intentionally render the same Chinese owner copy. Runtime locale dictionaries derive their welcome values from that file, and tests import the same owner instead of repeating paragraph text. The notice is browser UI only: it creates no Session event and contributes no model-visible content. The notice identifies `DSH_TELEMETRY_DISABLED=1` as the telemetry opt-out.
 
-**Loopback acknowledgement is durable per Harness profile.** The Host half registers a `ui-onboarding` section in the user-settings seam, stored under the active `$DSH_HOME/settings.yaml`. A loopback browser shows the notice unless `welcomeNoticeVersion` equals the owner constant exactly. Continue applies one path mutation with the current version and calls `complete()` only after the Host commits it; a failed write leaves the notice open, and closing the page or process writes nothing. Bumping the constant intentionally makes every profile acknowledge the revised copy once. A non-loopback browser must not call the loopback-only settings API. It presents the same notice, but explicit Continue completes the step only in the current browser process; reload or a new process presents it again.
+**Loopback acknowledgement is durable per Harness profile.** The Host half registers a `ui-onboarding` section in the user-settings seam, stored under the active `$DSH_HOME/settings.yaml`. The connection plugin publishes whether the current page uses a loopback authority as `ctx.connection.isLoopback`; hostname classification remains internal to the connection package, and other client plugins consume the service state instead of importing its implementation. A loopback browser shows the notice unless `welcomeNoticeVersion` equals the owner constant exactly. Continue applies one path mutation with the current version and calls `complete()` only after the Host commits it; a failed write leaves the notice open, and closing the page or process writes nothing. Bumping the constant intentionally makes every profile acknowledge the revised copy once. A non-loopback browser must not call the loopback-only settings API. It presents the same notice, but explicit Continue completes the step only in the current browser process; reload or a new process presents it again.
 
 **Concurrent loopback views converge without stale replacement.** The acknowledgement write omits `expectedRevision` deliberately: every loopback tab writes the same version to one path, so the operation is idempotent and preserves sibling fields instead of rebuilding the section. `settings/document-updated` becomes `host/settings-changed`; an already mounted loopback tab refetches and advances when another tab or an external editor commits the current version. The API proxy exposes this one product namespace through a closed allowlist beside configurable-provider namespaces, without treating its changes as model-catalog invalidations.
 

.agents/notes/implemented/feature/2026-07-30-versioned-gui-welcome-onboarding.zh.md

@@ -14,7 +14,7 @@ GUI 的凭据引导从 DeepSeek 专用的就绪状态检查开始，但内部测
 
 **不属于单一功能的产品引导由 `ui-settings-general` 持有。** `src/onboarding-copy.ts` 是完整通知、「继续」按钮文案和 `WELCOME_NOTICE_VERSION` 的唯一可编辑来源；GUI 支持的两种 locale 都有意渲染同一份中文所有者文案。运行时 locale 字典从该文件派生欢迎文案，测试也导入同一个所有者，而不重复段落文本。该通知只存在于浏览器 UI：它不会创建会话事件，也不会贡献任何模型可见内容。通知明确以 `DSH_TELEMETRY_DISABLED=1` 作为遥测关闭方式。
 
-**loopback 确认状态按 Harness profile 持久化。** 宿主端在 user-settings seam 中注册 `ui-onboarding` 分节，并存入当前 `$DSH_HOME/settings.yaml`。除非 `welcomeNoticeVersion` 与文案所有者文件中的常量精确相等，否则 loopback 浏览器会显示通知。「继续」会以当前版本执行一次路径变更，并且仅在宿主端提交成功后调用 `complete()`；写入失败时通知保持打开，关闭页面或进程则不会写入任何内容。提升该常量会有意要求每个 profile 对修订后的文案重新确认一次。非 loopback 浏览器不能调用仅限 loopback 的 settings API；它仍显示同一通知，但显式点击「继续」只会在当前浏览器进程中完成该步骤，重新加载或新进程会再次显示通知。
+**loopback 确认状态按 Harness profile 持久化。** 宿主端在 user-settings seam 中注册 `ui-onboarding` 分节，并存入当前 `$DSH_HOME/settings.yaml`。connection 插件通过 `ctx.connection.isLoopback` 统一发布当前页面是否使用 loopback authority；hostname 判定函数留在 connection 包内，其他客户端插件只消费服务状态，不跨插件导入实现函数。除非 `welcomeNoticeVersion` 与文案所有者文件中的常量精确相等，否则 loopback 浏览器会显示通知。「继续」会以当前版本执行一次路径变更，并且仅在宿主端提交成功后调用 `complete()`；写入失败时通知保持打开，关闭页面或进程则不会写入任何内容。提升该常量会有意要求每个 profile 对修订后的文案重新确认一次。非 loopback 浏览器不能调用仅限 loopback 的 settings API；它仍显示同一通知，但显式点击「继续」只会在当前浏览器进程中完成该步骤，重新加载或新进程会再次显示通知。
 
 **并发 loopback 视图无需陈旧的整体替换即可收敛。** 确认写入有意省略 `expectedRevision`：每个 loopback 标签页都向同一路径写入相同版本，因此该操作是幂等的，并会保留同级字段，而不是重建整个分节。`settings/document-updated` 会转为 `host/settings-changed`；另一个标签页或外部编辑器提交当前版本后，已挂载的 loopback 标签页会重新拉取状态并推进。API 网关在可配置提供方 namespace 之外，通过封闭的允许列表暴露这一个产品 namespace，同时不会把它的变更视为模型目录失效事件。