feat: Round 5 - Memory Service, Tool Engine, Call Records, Thinking Logs

- Fix: Session history flash (race condition + WS guard)
- Fix: Chat background overlay + sidebar transparency
- Fix: IoT device control (Chinese action names, status field)
- Feat: Independent memory-service (port 8091, 13 endpoints)
- Feat: Independent tool-engine service (port 8092, 13 tools)
- Feat: Tool call logs with paginated DevTools panel
- Feat: Thinking log records with DevTools panel
- Feat: Future development roadmap document
- Chore: Updated .gitignore, go.work, DevTools config
- Chore: 5-service health check, project review docs

backend/ai-core/cmd/main.go

@@ -121,6 +121,12 @@ func main() {
 	thinkerCfg := background.DefaultThinkerConfig()
 	adminUserID := "admin_admin"
 	adminSessionID := "admin-session-main"
+
+	// 创建记忆服务 HTTP 客户端（用于持久化思考日志到 memory-service）
+	memServiceURL := getEnv("MEMORY_SERVICE_URL", "http://localhost:8091")
+	memClient := memory.NewClient(memServiceURL)
+	log.Printf("记忆服务客户端已就绪: %s", memServiceURL)
+
 	thinker := background.NewThinker(
 		thinkerCfg,
 		personaLoader,
@@ -133,6 +139,7 @@ func main() {
 		convStore,
 		adminUserID,
 		adminSessionID,
+		memClient,
 	)
 	thinker.Start()
 	defer thinker.Stop()