diff --git a/agent/agent.go b/agent/agent.go
index 3217e5ae..1e92b292 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -95,12 +95,46 @@ func (a *Agent) SetAIClient(c mcp.AIClient) {
 	a.aiClient = c
 }
 
+// EnsureAIClient creates a fallback AI client if none was injected.
+// Uses environment variables or store config.
+func (a *Agent) EnsureAIClient() {
+	if a.aiClient != nil {
+		return
+	}
+
+	// Try to create from store AI model configs
+	if a.store != nil {
+		models, err := a.store.AIModel().List("default")
+		if err == nil {
+			for _, m := range models {
+				apiKey := string(m.APIKey)
+				if apiKey != "" && m.CustomAPIURL != "" {
+					client := mcp.NewClient()
+					modelName := m.CustomModelName
+					if modelName == "" {
+						modelName = m.ID
+					}
+					client.SetAPIKey(apiKey, m.CustomAPIURL, modelName)
+					a.aiClient = client
+					a.logger.Info("agent AI client created from store", "model", modelName, "url", m.CustomAPIURL)
+					return
+				}
+			}
+		}
+	}
+
+	a.logger.Warn("no AI client available — chat and analysis will be limited")
+}
+
 
 
 // Start starts all agent services.
 func (a *Agent) Start() {
 	a.logger.Info("starting NOFXi agent...")
 
+	// Ensure we have an AI client
+	a.EnsureAIClient()
+
 	// Start sentinel (market anomaly detection)
 	if a.config.EnableSentinel {
 		a.sentinel = NewSentinel(a.config.WatchSymbols, a.handleSignal, a.logger)
@@ -167,7 +201,14 @@ func (a *Agent) HandleMessage(ctx context.Context, userID int64, text string) (s
 	case IntentQuery:
 		return a.handleQuery(lang, intent)
 	case IntentAnalyze:
-		return a.handleAnalyze(ctx, lang, intent)
+		// Only use structured analyze for simple "/analyze BTC" style commands
+		// Complex natural language goes to AI chat for better understanding
+		if len(strings.Fields(text)) <= 3 || strings.HasPrefix(text, "/") {
+			return a.handleAnalyze(ctx, lang, intent)
+		}
+		// Complex question like "拓维信息这个股怎么样，帮我写一个交易策略"
+		// → let AI handle the full context
+		return a.handleChat(ctx, lang, userID, text)
 	case IntentTrade:
 		return a.handleTrade(lang, intent)
 	case IntentWatch:
diff --git a/start.sh b/start.sh
index c0c4232e..e2498099 100755
--- a/start.sh
+++ b/start.sh
@@ -1,422 +1,34 @@
 #!/bin/bash
+# NOFXi startup script
+cd "$(dirname "$0")"
 
-# ═══════════════════════════════════════════════════════════════
-# NOFX AI Trading System - Docker Management Script
-# Usage: ./start.sh [command]
-# ═══════════════════════════════════════════════════════════════
+# Load env
+export RSA_PRIVATE_KEY=$(grep "^RSA_PRIVATE_KEY=" .env | sed 's/^RSA_PRIVATE_KEY=//' | sed 's/\\n/\n/g')
+export DATA_ENCRYPTION_KEY=$(grep "^DATA_ENCRYPTION_KEY=" .env | sed 's/^DATA_ENCRYPTION_KEY=//')
+export JWT_SECRET=$(grep "^JWT_SECRET=" .env | sed 's/^JWT_SECRET=//')
 
-set -e
+# Kill old processes
+pkill -f "./nofx" 2>/dev/null
+pkill -f "vite" 2>/dev/null
+sleep 1
 
-# ------------------------------------------------------------------------
-# Color Definitions
-# ------------------------------------------------------------------------
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-YELLOW='\033[1;33m'
-BLUE='\033[0;34m'
-CYAN='\033[0;36m'
-NC='\033[0m' # No Color
+# Build
+echo "🔨 Building NOFXi..."
+go build -o nofx . || exit 1
 
-# ------------------------------------------------------------------------
-# Utility Functions: Colored Output
-# ------------------------------------------------------------------------
-print_info() {
-    echo -e "${BLUE}[INFO]${NC} $1"
-}
+# Start backend
+echo "🚀 Starting backend (:8080)..."
+./nofx > nofxi.log 2>&1 &
+sleep 3
 
-print_success() {
-    echo -e "${GREEN}[SUCCESS]${NC} $1"
-}
+# Start frontend
+echo "🎨 Starting frontend (:3000)..."
+cd web && npx vite > /tmp/nofxi-web.log 2>&1 &
+sleep 2
 
-print_warning() {
-    echo -e "${YELLOW}[WARNING]${NC} $1"
-}
-
-print_error() {
-    echo -e "${RED}[ERROR]${NC} $1"
-}
-
-# ------------------------------------------------------------------------
-# Detection: Docker Compose Command (Backward Compatible)
-# ------------------------------------------------------------------------
-detect_compose_cmd() {
-    if command -v docker compose &> /dev/null; then
-        COMPOSE_CMD="docker compose"
-    elif command -v docker-compose &> /dev/null; then
-        COMPOSE_CMD="docker-compose"
-    else
-        print_error "Docker Compose not found. Please install Docker Compose first."
-        exit 1
-    fi
-    print_info "Using Docker Compose: $COMPOSE_CMD"
-}
-
-# ------------------------------------------------------------------------
-# Validation: Docker Installation
-# ------------------------------------------------------------------------
-check_docker() {
-    if ! command -v docker &> /dev/null; then
-        print_error "Docker not found. Please install Docker: https://docs.docker.com/get-docker/"
-        exit 1
-    fi
-
-    detect_compose_cmd
-    print_success "Docker and Docker Compose are installed"
-}
-
-# ------------------------------------------------------------------------
-# Validation: Environment File (.env)
-# ------------------------------------------------------------------------
-check_env() {
-    if [ ! -f ".env" ]; then
-        print_warning ".env not found, copying from template..."
-        cp .env.example .env
-        print_info ".env file created"
-    fi
-    print_success "Environment file exists"
-}
-
-# ------------------------------------------------------------------------
-# Helper: Check if env var is set and not placeholder
-# ------------------------------------------------------------------------
-is_env_configured() {
-    local var_name="$1"
-    local value=$(grep "^${var_name}=" .env 2>/dev/null | cut -d'=' -f2-)
-
-    # Strip quotes
-    value=$(echo "$value" | tr -d '"'"'")
-
-    # Check empty
-    if [ -z "$value" ]; then
-        return 1
-    fi
-
-    # Check placeholder values
-    case "$value" in
-        *your-*|*YOUR_*|*change-this*|*CHANGE_THIS*|*example*|*EXAMPLE*)
-            return 1
-            ;;
-    esac
-
-    return 0
-}
-
-# ------------------------------------------------------------------------
-# Helper: Set env var in .env file
-# ------------------------------------------------------------------------
-set_env_var() {
-    local var_name="$1"
-    local var_value="$2"
-
-    if grep -q "^${var_name}=" .env 2>/dev/null; then
-        if [[ "$OSTYPE" == "darwin"* ]]; then
-            sed -i '' "s|^${var_name}=.*|${var_name}=${var_value}|" .env
-        else
-            sed -i "s|^${var_name}=.*|${var_name}=${var_value}|" .env
-        fi
-    else
-        # Ensure .env ends with a newline before appending
-        if [ -s ".env" ] && [ "$(tail -c1 .env | wc -l)" -eq 0 ]; then
-            echo "" >> .env
-        fi
-        echo "${var_name}=${var_value}" >> .env
-    fi
-}
-
-# ------------------------------------------------------------------------
-# Validation: Encryption Keys in .env
-# ------------------------------------------------------------------------
-check_encryption() {
-    print_info "Checking encryption keys..."
-
-    local generated=false
-
-    if ! is_env_configured "JWT_SECRET"; then
-        print_warning "JWT_SECRET not set, generating..."
-        local jwt_secret=$(openssl rand -base64 32)
-        set_env_var "JWT_SECRET" "$jwt_secret"
-        print_success "JWT_SECRET generated"
-        generated=true
-    fi
-
-    if ! is_env_configured "DATA_ENCRYPTION_KEY"; then
-        print_warning "DATA_ENCRYPTION_KEY not set, generating..."
-        local data_key=$(openssl rand -base64 32)
-        set_env_var "DATA_ENCRYPTION_KEY" "$data_key"
-        print_success "DATA_ENCRYPTION_KEY generated"
-        generated=true
-    fi
-
-    if ! is_env_configured "RSA_PRIVATE_KEY"; then
-        print_warning "RSA_PRIVATE_KEY not set, generating..."
-        local rsa_key=$(openssl genrsa 2048 2>/dev/null | awk '{printf "%s\\n", $0}')
-        set_env_var "RSA_PRIVATE_KEY" "\"$rsa_key\""
-        print_success "RSA_PRIVATE_KEY generated"
-        generated=true
-    fi
-
-    if [ "$generated" = true ]; then
-        echo ""
-        print_success "Missing keys generated and saved to .env"
-        print_warning "Keep .env safe — do not commit it to version control"
-        echo ""
-    fi
-
-    print_success "Encryption keys OK"
-    print_info "  • JWT_SECRET: OK"
-    print_info "  • DATA_ENCRYPTION_KEY: OK"
-    print_info "  • RSA_PRIVATE_KEY: OK"
-
-    chmod 600 .env 2>/dev/null || true
-}
-
-# ------------------------------------------------------------------------
-# Utility: Read Environment Variables
-# ------------------------------------------------------------------------
-read_env_vars() {
-    if [ -f ".env" ]; then
-        NOFX_FRONTEND_PORT=$(grep "^NOFX_FRONTEND_PORT=" .env 2>/dev/null | cut -d'=' -f2 || echo "3000")
-        NOFX_BACKEND_PORT=$(grep "^NOFX_BACKEND_PORT=" .env 2>/dev/null | cut -d'=' -f2 || echo "8080")
-
-        NOFX_FRONTEND_PORT=$(echo "$NOFX_FRONTEND_PORT" | tr -d '"'"'" | tr -d ' ')
-        NOFX_BACKEND_PORT=$(echo "$NOFX_BACKEND_PORT" | tr -d '"'"'" | tr -d ' ')
-
-        NOFX_FRONTEND_PORT=${NOFX_FRONTEND_PORT:-3000}
-        NOFX_BACKEND_PORT=${NOFX_BACKEND_PORT:-8080}
-    else
-        NOFX_FRONTEND_PORT=3000
-        NOFX_BACKEND_PORT=8080
-    fi
-}
-
-# ------------------------------------------------------------------------
-# Validation: Database Directory (data/)
-# ------------------------------------------------------------------------
-check_database() {
-    if [ ! -d "data" ]; then
-        print_warning "Data directory missing, creating data/..."
-        install -m 700 -d data
-        print_success "data/ directory created"
-    else
-        print_success "Data directory exists"
-    fi
-}
-
-# ------------------------------------------------------------------------
-# Service Management: Start
-# ------------------------------------------------------------------------
-start() {
-    echo ""
-    echo -e "${CYAN}╔══════════════════════════════════════════════════════╗${NC}"
-    echo -e "${CYAN}║         🚀 NOFX AI Trading Bot — Startup             ║${NC}"
-    echo -e "${CYAN}╚══════════════════════════════════════════════════════╝${NC}"
-    echo ""
-
-    read_env_vars
-
-    if [ ! -d "data" ]; then
-        install -m 700 -d data
-    fi
-
-    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
-    print_info "Starting services..."
-
-    if [ "$1" == "--build" ]; then
-        $COMPOSE_CMD up -d --build
-    else
-        $COMPOSE_CMD up -d
-    fi
-
-    echo ""
-    echo -e "${GREEN}╔══════════════════════════════════════════════════════╗${NC}"
-    echo -e "${GREEN}║  ✅ Started! Next steps:                             ║${NC}"
-    echo -e "${GREEN}╚══════════════════════════════════════════════════════╝${NC}"
-    echo ""
-    echo "  1. Open the web dashboard to register and configure"
-    echo "  2. Add an AI model and exchange in Settings"
-    echo "  3. (Optional) Add a Telegram bot token in Settings → Telegram"
-    echo ""
-    echo -e "  Web dashboard: ${BLUE}http://localhost:${NOFX_FRONTEND_PORT}${NC}"
-    echo -e "  View logs:     ${YELLOW}./start.sh logs${NC}"
-    echo -e "  Stop:          ${YELLOW}./start.sh stop${NC}"
-    echo ""
-}
-
-# ------------------------------------------------------------------------
-# Service Management: Stop
-# ------------------------------------------------------------------------
-stop() {
-    print_info "Stopping services..."
-    $COMPOSE_CMD stop
-    print_success "Services stopped"
-}
-
-# ------------------------------------------------------------------------
-# Service Management: Restart
-# ------------------------------------------------------------------------
-restart() {
-    print_info "Restarting services..."
-    $COMPOSE_CMD restart
-    print_success "Services restarted"
-}
-
-# ------------------------------------------------------------------------
-# Monitoring: Logs
-# ------------------------------------------------------------------------
-logs() {
-    if [ -z "$2" ]; then
-        $COMPOSE_CMD logs -f
-    else
-        $COMPOSE_CMD logs -f "$2"
-    fi
-}
-
-# ------------------------------------------------------------------------
-# Monitoring: Status
-# ------------------------------------------------------------------------
-status() {
-    read_env_vars
-
-    print_info "Service status:"
-    $COMPOSE_CMD ps
-    echo ""
-    print_info "Health check:"
-    curl -s "http://localhost:${NOFX_BACKEND_PORT}/api/health" | jq '.' || echo "Backend not responding"
-}
-
-# ------------------------------------------------------------------------
-# Maintenance: Clean (Destructive)
-# ------------------------------------------------------------------------
-clean() {
-    print_warning "This will delete all containers and data!"
-    read -p "Confirm? (yes/no): " confirm
-    if [ "$confirm" == "yes" ]; then
-        print_info "Cleaning up..."
-        $COMPOSE_CMD down -v
-        print_success "Cleanup complete"
-    else
-        print_info "Cancelled"
-    fi
-}
-
-# ------------------------------------------------------------------------
-# Maintenance: Update
-# ------------------------------------------------------------------------
-update() {
-    print_info "Updating..."
-    git pull
-    $COMPOSE_CMD up -d --build
-    print_success "Update complete"
-}
-
-# ------------------------------------------------------------------------
-# Command: Regenerate all keys (force)
-# ------------------------------------------------------------------------
-regenerate_keys() {
-    print_warning "This will regenerate ALL encryption keys!"
-    print_warning "Any existing encrypted data will become unreadable!"
-    echo ""
-    read -p "Confirm? (yes/no): " confirm
-    if [ "$confirm" != "yes" ]; then
-        print_info "Cancelled"
-        return
-    fi
-
-    check_env
-
-    print_info "Generating new keys..."
-
-    local jwt_secret=$(openssl rand -base64 32)
-    set_env_var "JWT_SECRET" "$jwt_secret"
-    print_success "JWT_SECRET generated"
-
-    local data_key=$(openssl rand -base64 32)
-    set_env_var "DATA_ENCRYPTION_KEY" "$data_key"
-    print_success "DATA_ENCRYPTION_KEY generated"
-
-    local rsa_key=$(openssl genrsa 2048 2>/dev/null | awk '{printf "%s\\n", $0}')
-    set_env_var "RSA_PRIVATE_KEY" "\"$rsa_key\""
-    print_success "RSA_PRIVATE_KEY generated"
-
-    chmod 600 .env 2>/dev/null || true
-
-    echo ""
-    print_success "All keys regenerated and saved to .env"
-    print_warning "Keep .env safe"
-}
-
-# ------------------------------------------------------------------------
-# Help: Usage Information
-# ------------------------------------------------------------------------
-show_help() {
-    echo "NOFX AI Trading System - Docker Management Script"
-    echo ""
-    echo "Usage: ./start.sh [command] [options]"
-    echo ""
-    echo "Commands:"
-    echo "  start [--build]    Start services (optional: rebuild images)"
-    echo "  stop               Stop services"
-    echo "  restart            Restart services"
-    echo "  logs [service]     View logs (optional: backend / frontend)"
-    echo "  status             Show service status"
-    echo "  clean              Remove all containers and data"
-    echo "  update             Pull latest code and rebuild"
-    echo "  regenerate-keys    Regenerate all encryption keys (destructive)"
-    echo "  help               Show this help"
-    echo ""
-    echo "Examples:"
-    echo "  ./start.sh start --build    # Build and start"
-    echo "  ./start.sh logs backend     # View backend logs"
-    echo "  ./start.sh status           # Check status"
-    echo ""
-    echo "First time:"
-    echo "  Just run ./start.sh — missing keys are generated automatically"
-}
-
-# ------------------------------------------------------------------------
-# Main: Command Dispatcher
-# ------------------------------------------------------------------------
-main() {
-    check_docker
-
-    case "${1:-start}" in
-        start)
-            check_env
-            check_encryption
-            check_database
-            start "$2"
-            ;;
-        stop)
-            stop
-            ;;
-        restart)
-            restart
-            ;;
-        logs)
-            logs "$@"
-            ;;
-        status)
-            status
-            ;;
-        clean)
-            clean
-            ;;
-        update)
-            update
-            ;;
-        regenerate-keys)
-            regenerate_keys
-            ;;
-        help|--help|-h)
-            show_help
-            ;;
-        *)
-            print_error "Unknown command: $1"
-            show_help
-            exit 1
-            ;;
-    esac
-}
-
-# Execute Main
-main "$@"
+# Verify
+echo ""
+curl -s http://localhost:8080/api/agent/health > /dev/null && echo "✅ Backend: http://localhost:8080" || echo "❌ Backend failed"
+curl -s http://localhost:3000/ > /dev/null && echo "✅ Frontend: http://localhost:3000" || echo "❌ Frontend failed"
+echo ""
+echo "NOFXi is ready 🧠"