feat(config): default thinking for sessions_spawn subagents (#7372)

* feat(config): add subagent default thinking

* fix: accept config subagents.thinking + stabilize test mocks (#7372) (thanks @tyler6204)

* fix: use findLast instead of clearAllMocks in test (#7372)

* fix: correct test assertions for tool result structure (#7372)

* fix: remove unnecessary type assertion after rebase

docs/tools/subagents.md

@@ -40,6 +40,7 @@ Use `sessions_spawn`:
 - Starts a sub-agent run (`deliver: false`, global lane: `subagent`)
 - Then runs an announce step and posts the announce reply to the requester chat channel
 - Default model: inherits the caller unless you set `agents.defaults.subagents.model` (or per-agent `agents.list[].subagents.model`); an explicit `sessions_spawn.model` still wins.
+- Default thinking: inherits the caller unless you set `agents.defaults.subagents.thinking` (or per-agent `agents.list[].subagents.thinking`); an explicit `sessions_spawn.thinking` still wins.
 
 Tool params:
 

docs/zh-CN/tools/subagents.md

@@ -45,6 +45,7 @@ x-i18n:
 - 启动子智能体运行（`deliver: false`，全局队列：`subagent`）
 - 然后运行回报步骤，将回报回复发布到请求者的聊天渠道
 - 默认模型：继承调用者，除非你设置了 `agents.defaults.subagents.model`（或按智能体 `agents.list[].subagents.model`）；显式的 `sessions_spawn.model` 仍然优先。
+- 默认思考级别：继承调用者，除非你设置了 `agents.defaults.subagents.thinking`（或按智能体 `agents.list[].subagents.thinking`）；显式的 `sessions_spawn.thinking` 仍然优先。
 
 工具参数：