feat: 添加 Markdown 终端渲染支持（glamour）

cmd/hxclaw/internal/helpers.go

@@ -118,3 +118,38 @@ func (r *SimpleReader) ReadString() (string, error) {
 	}
 	return line, nil
 }
+
+func FindParagraphEnd(text string, startPos int) int {
+	if startPos >= len(text) {
+		return 0
+	}
+
+	inCodeBlock := false
+	inMathBlock := false
+
+	for i := startPos; i < len(text); i++ {
+		if i+3 < len(text) && text[i:i+3] == "```" {
+			if !inCodeBlock {
+				inCodeBlock = true
+			} else {
+				inCodeBlock = false
+			}
+			continue
+		}
+
+		if i+2 < len(text) && (text[i:i+2] == "$$" || text[i:i+2] == "\\[") {
+			inMathBlock = !inMathBlock
+			continue
+		}
+
+		if inCodeBlock || inMathBlock {
+			continue
+		}
+
+		if i+1 < len(text) && text[i] == '\n' && text[i+1] == '\n' {
+			return i + 2
+		}
+	}
+
+	return 0
+}

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
+}