fix(agent): 明确 pending 消息消费决策

[CookSleep]

Summary

• 将 agent 的 round-decision 语义从 canContinue 明确为 willConsumePendingMessages，让 pending message 消费决策更直观
• 为 character_reply 最终完成分支补充 reply-emitted 标记与 pending drain，避免回复已由工具发送时 trace 仍表现为空输出
• 同步主聊天服务对新事件字段的消费逻辑

Verification

• yarn fast-build core

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 7af23fd5-5e8b-48e1-bf3a-63fed6945906

📥 Commits

Reviewing files that changed from the base of the PR and between 086a1f7 and 70814bb.

📒 Files selected for processing (4)

• packages/core/src/llm-core/agent/legacy-executor.ts
• packages/core/src/llm-core/agent/sub-agent.ts
• packages/core/src/llm-core/agent/types.ts
• packages/core/src/services/chat.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[gemini-code-assist]

Code Review

This pull request renames the canContinue property to willConsumePendingMessages across the agent execution and chat service logic to more accurately describe its function. It also introduces a mechanism to handle final character replies emitted by tools, adding a replyEmitted flag to the done event and updating the UI to reflect when a reply has been sent by a tool. Furthermore, the Docker configuration guide for the extension agent has been updated with recommendations for setting home and working directories, and the parameter descriptions for the group mute tool have been refined for better clarity. I have no feedback to provide as there were no review comments to evaluate.