feat: Phase 1 — ReAct loop + Markdown rendering + Docker deployment

Backend:
- Enterprise Agent refactored from single-round to ReAct multi-turn loop
- New agent.ts (LLM decision node) + tool-executor.ts (tool execution + Gen-UI)
- tool-defs.ts extracted for shared tool schemas
- MAX_ITERATIONS=6 safeguard against infinite loops

Frontend:
- MessageBubble: Markdown + code highlighting + LaTeX + tables
- ThemeToggle: light/dark/system theme cycling
- chart-result Gen-UI card: recharts bar/line/pie/area charts

Infrastructure:
- Docker Compose (lightweight): only LangGraph + Frontend, Azure cloud for PG/Redis/Blob
- Dockerfiles for dev (hot reload) and prod
- Makefile with dev/prod/down/logs commands
- Updated CLAUDE.md and agent definitions for LangGraph.js architecture

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Makefile

@@ -0,0 +1,84 @@
+# SOC Chat Clone - Local Docker Commands (lightweight)
+# 基础设施用 Azure 云服务，本地只运行 LangGraph Server + Frontend
+# ====================================================================
+# make dev       - 开发模式（热重载）
+# make prod      - 生产模式
+# make down      - 停止
+# make logs      - 查看日志
+
+.PHONY: dev prod down logs clean status setup check-env build-dev build-prod restart-backend restart-frontend
+
+# ─── Environment ─────────────────────────────────────────────────
+check-env:
+	@if [ ! -f langgraph/.env ]; then \
+		echo "ERROR: langgraph/.env not found."; \
+		echo "  Run: make setup"; \
+		exit 1; \
+	fi
+
+setup:
+	@if [ ! -f langgraph/.env ]; then \
+		cp langgraph/.env.docker.example langgraph/.env; \
+		echo "Created langgraph/.env — 请检查并填入 GOOGLE_API_KEY 等缺失值"; \
+	else \
+		echo "langgraph/.env already exists, skipping."; \
+	fi
+
+# ─── Development ─────────────────────────────────────────────────
+dev: check-env
+	docker compose --profile dev up --build
+
+dev-d: check-env
+	docker compose --profile dev up --build -d
+
+build-dev:
+	docker compose --profile dev build
+
+# ─── Production ──────────────────────────────────────────────────
+prod: check-env
+	docker compose --profile prod up --build
+
+prod-d: check-env
+	docker compose --profile prod up --build -d
+
+build-prod:
+	docker compose --profile prod build
+
+# ─── Lifecycle ───────────────────────────────────────────────────
+down:
+	docker compose --profile dev --profile prod down
+
+clean:
+	docker compose --profile dev --profile prod down --rmi local
+	@echo "All containers stopped and images removed."
+
+restart-backend:
+	docker compose restart langgraph-dev 2>/dev/null || docker compose restart langgraph-prod 2>/dev/null
+
+restart-frontend:
+	docker compose restart frontend-dev 2>/dev/null || docker compose restart frontend-prod 2>/dev/null
+
+# ─── Observability ───────────────────────────────────────────────
+logs:
+	docker compose --profile dev --profile prod logs -f
+
+logs-backend:
+	docker compose logs -f langgraph-dev langgraph-prod 2>/dev/null
+
+logs-frontend:
+	docker compose logs -f frontend-dev frontend-prod 2>/dev/null
+
+status:
+	@echo "=== Container Status ==="
+	@docker compose --profile dev --profile prod ps
+	@echo ""
+	@echo "=== Endpoints ==="
+	@echo "  Frontend (dev):  http://localhost:5173"
+	@echo "  Frontend (prod): http://localhost:3000"
+	@echo "  LangGraph API:   http://localhost:2024"
+	@echo ""
+	@echo "=== Azure Cloud Services ==="
+	@echo "  PostgreSQL: dataope.postgres.database.azure.com"
+	@echo "  Redis:      oper.redis.cache.windows.net:6380"
+	@echo "  Blob:       authdatablol.blob.core.windows.net"
+	@echo "  Service Bus: databus.servicebus.windows.net"