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/utils/forkedAgent.ts

@@ -374,6 +374,10 @@ export function createSubagentContext(
         }
 
   return {
+    // Preserve the parent Langfuse trace separately so nested side queries
+    // like auto_mode can attach to the main agent trace instead of the
+    // subagent's own trace.
+    langfuseRootTrace: parentContext.langfuseTrace,
     // Mutable state - cloned by default to maintain isolation
     // Clone overrides.readFileState if provided, otherwise clone from parent
     readFileState: cloneFileStateCache(