fix: 为 auto dream 添加 maxTurns: 20 限制，防止单次执行消耗过多 token

Author: claude-code-best

src/services/autoDream/autoDream.ts

@@ -228,6 +228,7 @@ ${sessionIds.map(id => `- ${id}`).join('\n')}`
         canUseTool: createAutoMemCanUseTool(memoryRoot),
         querySource: 'auto_dream',
         forkLabel: 'auto_dream',
+        maxTurns: 20,
         skipTranscript: true,
         overrides: { abortController },
         onMessage: makeDreamProgressWatcher(taskId, setAppState),