feat: 添加 Markdown 终端渲染支持（glamour）

cmd/hxclaw/internal/markdown.go

@@ -0,0 +1,70 @@
+package internal
+
+import (
+	"os"
+	"strings"
+
+	"charm.land/glamour/v2"
+)
+
+func RenderMarkdown(md string) string {
+	if md == "" {
+		return ""
+	}
+
+	style := getStyle()
+
+	r, err := glamour.NewTermRenderer(
+		glamour.WithStandardStyle(style),
+		glamour.WithWordWrap(80),
+	)
+	if err != nil {
+		return md
+	}
+	defer r.Close()
+
+	out, err := r.Render(md)
+	if err != nil {
+		return md
+	}
+
+	return out
+}
+
+func RenderParagraph(text string) string {
+	if text == "" {
+		return ""
+	}
+
+	text = strings.TrimRight(text, "\n")
+
+	if text == "" {
+		return ""
+	}
+
+	style := getStyle()
+
+	r, err := glamour.NewTermRenderer(
+		glamour.WithStandardStyle(style),
+		glamour.WithWordWrap(80),
+	)
+	if err != nil {
+		return text
+	}
+	defer r.Close()
+
+	out, err := r.Render(text)
+	if err != nil {
+		return text
+	}
+
+	return out
+}
+
+func getStyle() string {
+	style := "dark"
+	if s := os.Getenv("GLAMOUR_STYLE"); s != "" {
+		style = s
+	}
+	return style
+}