Preserve opened subagents when parents are archived (#3279)

* fix(subagents): preserve opened children on parent archive

Opening a managed child represents user ownership only while that client's tab remains open. Track that intent per client, detach surviving children during parent archive, and keep single and bulk tab-close behavior consistent.

* fix(subagents): mark generic tab openings

Centralize managed child tab ownership in agent navigation so list, command-center, deep-link, notification, and subagent-track openings all mark ownership before creating the tab. Use stable localized errors for lifecycle failures.

* fix(subagents): classify cold tab openings

Fetch uncached agents before deciding whether tab ownership must be recorded, so notification, desktop, and cold-route openings cannot bypass parent archive protection.

* fix(app): translate navigation fallback errors

* fix(navigation): allow offline workspace intents

* refactor(app): derive subagent ownership from open tabs

* fix(server): serialize subagent lifecycle ownership

packages/app/src/i18n/resources/ar.ts

@@ -614,6 +614,7 @@ export const ar: TranslationResources = {
         reloadingAgent: "وكيل إعادة التحميل...",
         reloadedAgent: "وكيل إعادة تحميل",
         failedToReloadAgent: "فشل في إعادة تحميل الوكيل",
+        failedToCloseAgent: "فشل في إغلاق الوكيل",
       },
       confirmations: {
         unsavedTitle: "تغييرات غير محفوظة",

packages/app/src/i18n/resources/en.ts

@@ -613,6 +613,7 @@ export const en = {
         reloadingAgent: "Reloading agent...",
         reloadedAgent: "Reloaded agent",
         failedToReloadAgent: "Failed to reload agent",
+        failedToCloseAgent: "Failed to close agent",
       },
       confirmations: {
         close: "Close",

packages/app/src/i18n/resources/es.ts

@@ -619,6 +619,7 @@ export const es: TranslationResources = {
         reloadingAgent: "Agente de recarga...",
         reloadedAgent: "Agente recargado",
         failedToReloadAgent: "No se pudo recargar el agente",
+        failedToCloseAgent: "No se pudo cerrar el agente",
       },
       confirmations: {
         unsavedTitle: "Cambios sin guardar",

packages/app/src/i18n/resources/fr.ts

@@ -619,6 +619,7 @@ export const fr: TranslationResources = {
         reloadingAgent: "Agent de rechargement...",
         reloadedAgent: "Agent rechargé",
         failedToReloadAgent: "Échec du rechargement de l'agent",
+        failedToCloseAgent: "Échec de la fermeture de l'agent",
       },
       confirmations: {
         unsavedTitle: "Modifications non enregistrées",

packages/app/src/i18n/resources/ja.ts

@@ -619,6 +619,7 @@ export const ja: TranslationResources = {
         reloadingAgent: "エージェントを再読み込み中...",
         reloadedAgent: "エージェントを再読み込みしました",
         failedToReloadAgent: "エージェントの再読み込みに失敗しました",
+        failedToCloseAgent: "エージェントを閉じられませんでした",
       },
       confirmations: {
         unsavedTitle: "未保存の変更",

packages/app/src/i18n/resources/ko.ts

@@ -616,6 +616,7 @@ export const ko: TranslationResources = {
         reloadingAgent: "에이전트 다시 로드 중...",
         reloadedAgent: "에이전트를 다시 로드했습니다",
         failedToReloadAgent: "에이전트를 다시 로드하지 못했습니다",
+        failedToCloseAgent: "에이전트를 닫지 못했습니다",
       },
       confirmations: {
         close: "닫기",

packages/app/src/i18n/resources/pt-BR.ts

@@ -618,6 +618,7 @@ export const ptBR: TranslationResources = {
         reloadingAgent: "Recarregando agente...",
         reloadedAgent: "Agente recarregado",
         failedToReloadAgent: "Falha ao recarregar agente",
+        failedToCloseAgent: "Falha ao fechar agente",
       },
       confirmations: {
         unsavedTitle: "Alterações não salvas",

packages/app/src/i18n/resources/ru.ts

@@ -618,6 +618,7 @@ export const ru: TranslationResources = {
         reloadingAgent: "Перезагрузка агента...",
         reloadedAgent: "Перезагруженный агент",
         failedToReloadAgent: "Не удалось перезагрузить агент",
+        failedToCloseAgent: "Не удалось закрыть агент",
       },
       confirmations: {
         unsavedTitle: "Несохранённые изменения",

packages/app/src/i18n/resources/zh-CN.ts

@@ -614,6 +614,7 @@ export const zhCN: TranslationResources = {
         reloadingAgent: "正在重新加载 Agent...",
         reloadedAgent: "已重新加载 Agent",
         failedToReloadAgent: "重新加载 Agent 失败",
+        failedToCloseAgent: "关闭 Agent 失败",
       },
       confirmations: {
         unsavedTitle: "未保存的更改",