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/gateway/internal/handler/webhook_handler.go

@@ -8,7 +8,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
+	"github.com/yourname/cyrene-ai/pkg/logger"
 	"net/http"
 	"strings"
 	"time"
@@ -95,7 +95,7 @@ func (h *WebhookHandler) HandleGenericWebhook(c *gin.Context) {
 	// 调用 AI-Core 获取回复
 	resp, err := h.callAICore(userID, sessionID, req.Message, mode, platform)
 	if err != nil {
-		log.Printf("[webhook] AI-Core 调用失败 (platform=%s): %v", platform, err)
+		logger.Printf("[webhook] AI-Core 调用失败 (platform=%s): %v", platform, err)
 		c.JSON(502, GenericWebhookResponse{Error: "AI 服务暂不可用: " + err.Error()})
 		return
 	}
@@ -244,7 +244,7 @@ func (h *WebhookHandler) HandleDiscordWebhook(c *gin.Context) {
 	// 但这里简化处理：直接同步调用 AI-Core（如果调用超过 3 秒，Discord 会显示超时）
 	resp, err := h.callAICore("ext_"+userID, sessionID, message, "text", "discord")
 	if err != nil {
-		log.Printf("[webhook:discord] AI-Core 调用失败: %v", err)
+		logger.Printf("[webhook:discord] AI-Core 调用失败: %v", err)
 		c.JSON(200, DiscordResponse{
 			Type: 4,
 			Data: &DiscordResponseData{Content: "昔涟暂时无法回应喵...（AI 服务异常: " + err.Error() + "）"},