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/sideQuery.ts

@@ -19,6 +19,7 @@ import { createTrace, createChildSpan, endTrace, recordLLMObservation } from '..
 import type { LangfuseSpan } from '../services/langfuse/index.js'
 import { convertMessagesToLangfuse, convertOutputToLangfuse, convertToolsToLangfuse } from '../services/langfuse/convert.js'
 import { getModelBetas, modelSupportsStructuredOutputs } from './betas.js'
+import { logForDebugging } from './debug.js'
 import { errorMessage } from './errors.js'
 import { computeFingerprint } from './fingerprint.js'
 import { getAPIProvider } from './model/providers.js'
@@ -194,21 +195,35 @@ export async function sideQuery(opts: SideQueryOptions): Promise<BetaMessage> {
 
   // When parentSpan is provided, create a child span nested under the
   // main agent trace; otherwise create a standalone root trace.
-  const langfuseTrace = opts.parentSpan
-    ? createChildSpan(opts.parentSpan, {
+  const _ps = opts.parentSpan
+  // eslint-disable-next-line no-constant-condition
+  if (opts.querySource === 'auto_mode') {
+    logForDebugging(
+      `[sideQuery] auto_mode parentSpan=${_ps ? `id=${(_ps as unknown as Record<string, unknown>).id ?? 'present'}` : 'null/undefined'} querySource=${opts.querySource}`,
+    )
+  }
+  // When parentSpan is provided, create a child span nested under the
+  // main agent trace. For auto_mode queries, we must always nest under
+  // a parent span — never create a standalone root trace (agent type),
+  // as auto_mode observations should appear as spans within the parent.
+  // For other query sources without a parent, create a standalone trace.
+  const langfuseTrace = _ps
+    ? createChildSpan(_ps, {
         name: traceName,
         sessionId: getSessionId(),
         model: normalizedModel,
         provider,
         querySource: opts.querySource,
       })
-    : createTrace({
-        sessionId: getSessionId(),
-        model: normalizedModel,
-        provider,
-        name: traceName,
-        querySource: opts.querySource,
-      })
+    : opts.querySource === 'auto_mode'
+      ? null
+      : createTrace({
+          sessionId: getSessionId(),
+          model: normalizedModel,
+          provider,
+          name: traceName,
+          querySource: opts.querySource,
+        })
 
   let response: BetaMessage
   try {