feat(auth): authentication module with multi-tenant isolation (RFC-001)

Introduce an always-on auth layer with auto-created admin on first boot,
multi-tenant isolation for threads/stores, and a full setup/login flow.

Backend
- JWT access tokens with `ver` field for stale-token rejection; bump on
  password/email change
- Password hashing, HttpOnly+Secure cookies (Secure derived from request
  scheme at runtime)
- CSRF middleware covering both REST and LangGraph routes
- IP-based login rate limiting (5 attempts / 5-min lockout) with bounded
  dict growth and X-Forwarded-For bypass fix
- Multi-worker-safe admin auto-creation (single DB write, WAL once)
- needs_setup + token_version on User model; SQLite schema migration
- Thread/store isolation by owner; orphan thread migration on first admin
  registration
- thread_id validated as UUID to prevent log injection
- CLI tool to reset admin password
- Decorator-based authz module extracted from auth core

Frontend
- Login and setup pages with SSR guard for needs_setup flow
- Account settings page (change password / email)
- AuthProvider + route guards; skips redirect when no users registered
- i18n (en-US / zh-CN) for auth surfaces
- Typed auth API client; parseAuthError unwraps FastAPI detail envelope

Infra & tooling
- Unified `serve.sh` with gateway mode + auto dep install
- Public PyPI uv.toml pin for CI compatibility
- Regenerated uv.lock with public index

Tests
- HTTP vs HTTPS cookie security tests
- Auth middleware, rate limiter, CSRF, setup flow coverage

Makefile

@@ -1,6 +1,6 @@
 # DeerFlow - Unified Development Environment
 
-.PHONY: help config config-upgrade check install dev dev-daemon start stop up down clean docker-init docker-start docker-stop docker-logs docker-logs-frontend docker-logs-gateway
+.PHONY: help config config-upgrade check install dev dev-pro dev-daemon dev-daemon-pro start start-pro start-daemon start-daemon-pro stop up up-pro down clean docker-init docker-start docker-start-pro docker-stop docker-logs docker-logs-frontend docker-logs-gateway
 
 BASH ?= bash
 
@@ -20,18 +20,25 @@ help:
 	@echo "  make install         - Install all dependencies (frontend + backend)"
 	@echo "  make setup-sandbox   - Pre-pull sandbox container image (recommended)"
 	@echo "  make dev             - Start all services in development mode (with hot-reloading)"
-	@echo "  make dev-daemon      - Start all services in background (daemon mode)"
+	@echo "  make dev-pro         - Start in dev + Gateway mode (experimental, no LangGraph server)"
+	@echo "  make dev-daemon      - Start dev services in background (daemon mode)"
+	@echo "  make dev-daemon-pro  - Start dev daemon + Gateway mode (experimental)"
 	@echo "  make start           - Start all services in production mode (optimized, no hot-reloading)"
+	@echo "  make start-pro       - Start in prod + Gateway mode (experimental)"
+	@echo "  make start-daemon    - Start prod services in background (daemon mode)"
+	@echo "  make start-daemon-pro - Start prod daemon + Gateway mode (experimental)"
 	@echo "  make stop            - Stop all running services"
 	@echo "  make clean           - Clean up processes and temporary files"
 	@echo ""
 	@echo "Docker Production Commands:"
 	@echo "  make up              - Build and start production Docker services (localhost:2026)"
+	@echo "  make up-pro          - Build and start production Docker in Gateway mode (experimental)"
 	@echo "  make down            - Stop and remove production Docker containers"
 	@echo ""
 	@echo "Docker Development Commands:"
 	@echo "  make docker-init     - Pull the sandbox image"
 	@echo "  make docker-start    - Start Docker services (mode-aware from config.yaml, localhost:2026)"
+	@echo "  make docker-start-pro - Start Docker in Gateway mode (experimental, no LangGraph container)"
 	@echo "  make docker-stop     - Stop Docker development services"
 	@echo "  make docker-logs     - View Docker development logs"
 	@echo "  make docker-logs-frontend - View Docker frontend logs"
@@ -105,6 +112,15 @@ else
 	@./scripts/serve.sh --dev
 endif
 
+# Start all services in dev + Gateway mode (experimental: agent runtime embedded in Gateway)
+dev-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --gateway
+else
+	@./scripts/serve.sh --dev --gateway
+endif
+
 # Start all services in production mode (with optimizations)
 start:
 	@$(PYTHON) ./scripts/check.py
@@ -114,30 +130,54 @@ else
 	@./scripts/serve.sh --prod
 endif
 
+# Start all services in prod + Gateway mode (experimental)
+start-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --gateway
+else
+	@./scripts/serve.sh --prod --gateway
+endif
+
 # Start all services in daemon mode (background)
 dev-daemon:
 	@$(PYTHON) ./scripts/check.py
 ifeq ($(OS),Windows_NT)
-	@call scripts\run-with-git-bash.cmd ./scripts/start-daemon.sh
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --daemon
 else
-	@./scripts/start-daemon.sh
+	@./scripts/serve.sh --dev --daemon
+endif
+
+# Start daemon + Gateway mode (experimental)
+dev-daemon-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --dev --gateway --daemon
+else
+	@./scripts/serve.sh --dev --gateway --daemon
+endif
+
+# Start prod services in daemon mode (background)
+start-daemon:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --daemon
+else
+	@./scripts/serve.sh --prod --daemon
+endif
+
+# Start prod daemon + Gateway mode (experimental)
+start-daemon-pro:
+	@$(PYTHON) ./scripts/check.py
+ifeq ($(OS),Windows_NT)
+	@call scripts\run-with-git-bash.cmd ./scripts/serve.sh --prod --gateway --daemon
+else
+	@./scripts/serve.sh --prod --gateway --daemon
 endif
 
 # Stop all services
 stop:
-	@echo "Stopping all services..."
-	@-pkill -f "langgraph dev" 2>/dev/null || true
-	@-pkill -f "uvicorn app.gateway.app:app" 2>/dev/null || true
-	@-pkill -f "next dev" 2>/dev/null || true
-	@-pkill -f "next start" 2>/dev/null || true
-	@-pkill -f "next-server" 2>/dev/null || true
-	@-pkill -f "next-server" 2>/dev/null || true
-	@-nginx -c $(PWD)/docker/nginx/nginx.local.conf -p $(PWD) -s quit 2>/dev/null || true
-	@sleep 1
-	@-pkill -9 nginx 2>/dev/null || true
-	@echo "Cleaning up sandbox containers..."
-	@-./scripts/cleanup-containers.sh deer-flow-sandbox 2>/dev/null || true
-	@echo "✓ All services stopped"
+	@./scripts/serve.sh --stop
 
 # Clean up
 clean: stop
@@ -159,6 +199,10 @@ docker-init:
 docker-start:
 	@./scripts/docker.sh start
 
+# Start Docker in Gateway mode (experimental)
+docker-start-pro:
+	@./scripts/docker.sh start --gateway
+
 # Stop Docker development environment
 docker-stop:
 	@./scripts/docker.sh stop
@@ -181,6 +225,10 @@ docker-logs-gateway:
 up:
 	@./scripts/deploy.sh
 
+# Build and start production services in Gateway mode
+up-pro:
+	@./scripts/deploy.sh --gateway
+
 # Stop and remove production containers
 down:
 	@./scripts/deploy.sh down