饥饿 starved 事件：网关认它、透传、落温和占位

接 sidecar turn_reassigned 事件：latch 竞态改判时清空本轮累积

dream 用 5m 缓存：深夜冷写省 0.75x

多多喊知渝之前先 warmup：握手没就绪不叫

C-9 revision: A 方案合并 dream→main session + 拆 system 成 static+dynamic

C-9: 知渝做梦功能 + 接通多多 dream_call/no_dream_alert

C-7/C-8: expose ZHIYU_* in /api/settings + sidecar /config proxy

C-3: OpenRouter default_model reads env dynamically, not from __init__

Add backend abstraction layer + /v1/zhiyu/chat endpoint