feat: 添加 tokens 统计和耗时显示功能

- 添加进程级别累计 CompletionTokens 统计
- 显示此次消耗 tokens 和耗时
- 显示累计 tokens（hxclaw 进程级别）
- 使用 lipgloss 样式（icon #ffcc80, text #5c7a9a）
- 更新 AGENTS.md 构建说明

cmd/hxclaw/main.go

@@ -3,8 +3,12 @@ package main
 import (
 	"context"
 	"fmt"
+	"math"
 	"os"
 	"strings"
+	"time"
+
+	"charm.land/lipgloss/v2"
 
 	"github.com/hxclaw/hxclaw/cmd/hxclaw/internal"
 	"github.com/muesli/termenv"
@@ -14,6 +18,8 @@ import (
 	"github.com/sipeed/picoclaw/pkg/providers"
 )
 
+var totalCompletionTokens int
+
 const Logo = "🦐"
 
 func main() {
@@ -122,6 +128,8 @@ func simpleInteractiveMode(agentLoop *agent.AgentLoop, sessionKey string) {
 
 // runWithStreaming 尝试使用流式输出，如果 Provider 不支持则回退到普通模式
 func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
+	startTime := time.Now()
+
 	agentInstance := agentLoop.GetRegistry().GetDefaultAgent()
 	if agentInstance == nil {
 		fmt.Println("错误：无法获取 Agent 实例")
@@ -160,7 +168,7 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 		var result strings.Builder
 		var printedLen int
 		firstToken := true
-		_, err := sp.ChatStream(ctx, messages, toolDefs, agentInstance.Model, nil, func(accumulated string) {
+		resp, err := sp.ChatStream(ctx, messages, toolDefs, agentInstance.Model, nil, func(accumulated string) {
 			if firstToken && len(accumulated) > 0 {
 				spinner.Stop()
 				firstToken = false
@@ -175,6 +183,7 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 		})
 
 		if err != nil {
+			spinner.Stop()
 			fmt.Printf("流式调用错误: %v\n", err)
 			return
 		}
@@ -183,7 +192,6 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 			allOutput := result.String()
 			rendered := internal.RenderMarkdown(allOutput)
 			if rendered != allOutput && rendered != "" {
-				// 计算流式输出的行数，清除
 				lines := strings.Count(allOutput, "\n") + 1
 				output := termenv.DefaultOutput()
 				output.CursorUp(1)
@@ -197,6 +205,9 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 				fmt.Println()
 			}
 
+			elapsed := time.Since(startTime)
+			printStats(resp, elapsed)
+
 			agentInstance.Sessions.AddMessage(sessionKey, "user", input)
 			agentInstance.Sessions.AddMessage(sessionKey, "assistant", allOutput)
 		}
@@ -214,3 +225,45 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 		}
 	}
 }
+
+var (
+	iconStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#ffcc80"))
+	textStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#5c7a9a"))
+)
+
+func printStats(resp *providers.LLMResponse, elapsed time.Duration) {
+	if resp == nil || resp.Usage == nil {
+		return
+	}
+
+	completionTokens := resp.Usage.CompletionTokens
+	if completionTokens <= 0 {
+		return
+	}
+
+	totalCompletionTokens += completionTokens
+
+	elapsedSec := math.Round(elapsed.Seconds()*10) / 10
+
+	thisTokens := formatTokens(completionTokens)
+	totalTokens := formatTokens(totalCompletionTokens)
+	elapsedStr := formatDuration(elapsedSec)
+
+	icon := iconStyle.Render("▣  ")
+	text := textStyle.Render(fmt.Sprintf("Tokens: %s  ·  耗时: %s  ·  总Tokens: %s", thisTokens, elapsedStr, totalTokens))
+	fmt.Printf("  %s%s\n\n", icon, text)
+}
+
+func formatTokens(n int) string {
+	if n >= 1000 {
+		return fmt.Sprintf("%.1fk", float64(n)/1000)
+	}
+	return fmt.Sprintf("%d", n)
+}
+
+func formatDuration(s float64) string {
+	if s >= 60 {
+		return fmt.Sprintf("%.1fm", s/60)
+	}
+	return fmt.Sprintf("%.1fs", s)
+}