feat: 添加 Markdown 终端渲染支持（glamour）

cmd/hxclaw/main.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/hxclaw/hxclaw/cmd/hxclaw/internal"
+	"github.com/muesli/termenv"
 	"github.com/sipeed/picoclaw/pkg/agent"
 	"github.com/sipeed/picoclaw/pkg/bus"
 	"github.com/sipeed/picoclaw/pkg/logger"
@@ -160,15 +161,15 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 		var printedLen int
 		firstToken := true
 		_, err := sp.ChatStream(ctx, messages, toolDefs, agentInstance.Model, nil, func(accumulated string) {
-			// 检测到第一个 token 时，停止 spinner
 			if firstToken && len(accumulated) > 0 {
 				spinner.Stop()
 				firstToken = false
 			}
 			if len(accumulated) > printedLen {
-				fmt.Print(accumulated[printedLen:])
+				newText := accumulated[printedLen:]
+				fmt.Print(newText)
 				os.Stdout.Sync()
-				result.WriteString(accumulated[printedLen:])
+				result.WriteString(newText)
 				printedLen = len(accumulated)
 			}
 		})
@@ -178,21 +179,38 @@ func runWithStreaming(agentLoop *agent.AgentLoop, input, sessionKey string) {
 			return
 		}
 
-		fmt.Println()
-		fmt.Println()
-
-		// 将用户消息和回复保存到 session
 		if result.Len() > 0 {
+			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)
+				output.ClearLine()
+				output.ClearLines(lines)
+				fmt.Print(rendered)
+				fmt.Println()
+				fmt.Println()
+			} else {
+				fmt.Println()
+				fmt.Println()
+			}
+
 			agentInstance.Sessions.AddMessage(sessionKey, "user", input)
-			agentInstance.Sessions.AddMessage(sessionKey, "assistant", result.String())
+			agentInstance.Sessions.AddMessage(sessionKey, "assistant", allOutput)
 		}
 	} else {
-		// 回退到普通模式
 		response, err := agentLoop.ProcessDirect(ctx, input, sessionKey)
 		if err != nil {
 			fmt.Printf("错误: %v\n", err)
 			return
 		}
-		fmt.Printf("\n%s %s\n\n", Logo, response)
+		rendered := internal.RenderMarkdown(response)
+		if rendered != "" && rendered != response {
+			fmt.Printf("\n%s\n\n", rendered)
+		} else {
+			fmt.Printf("\n%s %s\n\n", Logo, response)
+		}
 	}
 }