fix(executor): debug 输出 LLM 实际回复的前200字

之前只输出 💬 text，看不到 LLM 实际说了什么。
现在 stderr 会显示 LLM 回复前200字符，可以通过 checkpoint
找到完整文本。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/workers/src/roles/ExecutorRole.ts

@@ -87,13 +87,18 @@ After all required files are written and required verification has passed, write
         // Parse structured actions from native tool_calls first, then strict JSON/code-block fallback
         const actions = this.parse_actions(text, llm_response.tool_calls || [])
 
-        // Debug
+        // Debug: show actual LLM output
+        const textPreview = text.replace(/\n/g, '\\n').slice(0, 200)
         const actionSummary = actions.map(a => {
-          if (a.type === 'code_block') return `📄 ${(a as any).filename} (${(a as any).content.length}B)`
+          if (a.type === 'code_block') return `📄 ${(a as any).filename}`
           if (a.type === 'tool_call') return `🔧 ${(a as any).name}`
-          return `💬 text`
-        }).join(', ')
+          return `💬 ${textPreview}`
+        }).join(' | ')
         process.stderr.write(`[EXEC T${turn}] ${actionSummary}\n`)
+        // Also write full text to log for inspection
+        if (actions.length === 1 && actions[0].type === 'text') {
+          this.runtime.checkpoint('executor_text_response', { turn, text: text.slice(0, 1000) })
+        }
 
         // Execute all actions
         const hadActions = actions.some(a => a.type !== 'text')