feat: 增强 auto mode 的易用性 (#312)

* feat: poor 模式降级 yolo 审阅模型

* feat: 为多模块添加 Langfuse tracing 支持

在 web search、agent creation、away summary、token estimation、
skill improvement 等模块中集成 Langfuse trace，并透传至
compact/apiQueryHook/execPromptHook 等调用链。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 让 auto mode 记录回主 trace

* fix: reopen auto mode prompt when classifier is unavailable

* fix: 修复 auto mode 情况下, llm 报错导致弹窗也不打开的问题

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

src/query.ts

@@ -235,6 +235,9 @@ export async function* query(
   // When called as a sub-agent, langfuseTrace is already set by runAgent()
   // — reuse it instead of creating an independent trace.
   const ownsTrace = !params.toolUseContext.langfuseTrace
+  logForDebugging(
+    `[query] ownsTrace=${ownsTrace} incoming langfuseTrace=${params.toolUseContext.langfuseTrace ? 'present' : 'null/undefined'} isLangfuseEnabled=${isLangfuseEnabled()}`,
+  )
   const langfuseTrace = params.toolUseContext.langfuseTrace
     ?? (isLangfuseEnabled()
       ? createTrace({