feat: Phase 1+2 架构进化 — 连续思考链/主动消息决策/情感状态机/离线自主思考 (86文件)

Phase 1 (基础设施):
- ThinkChain 思考链连续性 + 差异化思考提示词 (persistent)
- AutonomousToolPolicy 工具安全策略 (safe/unsafe/conditional)
- MessageScheduler 自适应消息节奏 (Idle/Available/Busy)
- SessionEnrichmentStore 渐进式上下文丰富 (5层)
- ConversationBus 事件总线 + ResponseCache (dedup)
- pkg/logger 统一日志 + 所有 handler 替换 fmt.Printf
- NPE 守卫/链路优化/数据库表修复/Go workspace

Phase 2 (人格交互):
- EmotionState/EmotionTracker 情感状态机 (5种心情, 情绪衰减)
- ProactiveGuard 主动消息多维决策 (静默时段/紧急度/频率/校验)
- Gateway↔ai-core 在线状态感知链路 (presence notification)
- 离线思考频率控制 + 重连问候 + 离线消息排队

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/ai-core/cmd/main.go

@@ -219,6 +219,31 @@ func main() {
 		handleMemoryCRUD(w, r, memStore, memExtractor)
 	})
 
+		// Phase 2: 在线状态通知端点 (Gateway -> ai-core)
+	mux.HandleFunc("/api/v1/internal/presence", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			w.WriteHeader(http.StatusMethodNotAllowed)
+			return
+		}
+		if r.Header.Get("X-Internal-Token") != os.Getenv("INTERNAL_SERVICE_TOKEN") {
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+		var req struct {
+			UserID    string `json:"user_id"`
+			Status    string `json:"status"`
+			SessionID string `json:"session_id"`
+		}
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		online := req.Status == "online"
+		thinker.UpdatePresence(online, req.SessionID)
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte(`{"status":"ok"}`))
+	})
+
 	mux.HandleFunc("/api/v1/health", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.Write([]byte(`{"status":"ok","service":"ai-core","model":"` + llmAdapter.ModelName() + `"}`))