feat(feishu): 添加飞书富文本消息支持

- 实现 Markdown 到飞书交互卡片的转换功能
- 添加表格、标题等富文本元素解析支持
- 集成飞书交互式卡片消息发送机制
- 添加消息类型和内容构建逻辑
- 支持代码块保护和多表限制处理
- 实现表格行数限制和列宽配置功能

pkg/channels/feishu/feishu_64.go

@@ -102,17 +102,18 @@ func (c *FeishuChannel) Send(ctx context.Context, msg bus.OutboundMessage) error
 		return fmt.Errorf("chat ID is empty")
 	}
 
-	payload, err := json.Marshal(map[string]string{"text": msg.Content})
+	// Convert markdown to Feishu Interactive Card format
+	msgType, content, err := buildFeishuContent(msg.Content)
 	if err != nil {
-		return fmt.Errorf("failed to marshal feishu content: %w", err)
+		return fmt.Errorf("failed to build feishu content: %w", err)
 	}
 
 	req := larkim.NewCreateMessageReqBuilder().
 		ReceiveIdType(larkim.ReceiveIdTypeChatId).
 		Body(larkim.NewCreateMessageReqBodyBuilder().
 			ReceiveId(msg.ChatID).
-			MsgType(larkim.MsgTypeText).
+			MsgType(msgType).
-			Content(string(payload)).
+			Content(content).
 			Uuid(fmt.Sprintf("picoclaw-%d", time.Now().UnixNano())).
 			Build()).
 		Build()
@@ -128,6 +129,7 @@ func (c *FeishuChannel) Send(ctx context.Context, msg bus.OutboundMessage) error
 
 	logger.DebugCF("feishu", "Feishu message sent", map[string]any{
 		"chat_id":  msg.ChatID,
+		"msg_type": msgType,
 	})
 
 	return nil

pkg/channels/feishu/richtext.go

@@ -0,0 +1,255 @@
+//go:build amd64 || arm64 || riscv64 || mips64 || ppc64
+
+package feishu
+
+import (
+	"encoding/json"
+	"regexp"
+	"strings"
+
+	larkim "github.com/larksuite/oapi-sdk-go/v3/service/im/v1"
+)
+
+// Feishu Interactive Card message format:
+// {
+//   "config": { "wide_screen_mode": true },
+//   "elements": [
+//     { "tag": "markdown", "content": "..." },
+//     { "tag": "table", "columns": [...], "rows": [...] },
+//     { "tag": "div", "text": { "tag": "lark_md", "content": "**Heading**" } }
+//   ]
+// }
+
+// Feishu Card limits
+const (
+	maxTablesInCard = 1  // Feishu limit: only 1 table per card
+	maxRowsInTable  = 30 // Feishu limit: max rows per table
+)
+
+var (
+	// Match markdown tables (header + separator + data rows)
+	reTable = regexp.MustCompile(`(?m)((?:^[ \t]*\|.+\|[ \t]*\n)(?:^[ \t]*\|[-:\s|]+\|[ \t]*\n)(?:^[ \t]*\|.+\|[ \t]*\n?)+)`)
+	// Match headings
+	reHeading = regexp.MustCompile(`(?m)^(#{1,6})\s+(.+)$`)
+	// Match code blocks (to protect them from heading parsing)
+	reCodeBlock = regexp.MustCompile("(```[\\s\\S]*?```)")
+)
+
+// cardElement represents an element in Feishu interactive card.
+type cardElement map[string]any
+
+// cardColumn represents a column definition in Feishu table.
+type cardColumn struct {
+	Tag         string `json:"tag"`
+	Name        string `json:"name"`
+	DisplayName string `json:"display_name"`
+	Width       string `json:"width"`
+}
+
+// markdownToFeishuCard converts Markdown text to Feishu Interactive Card JSON content string.
+func markdownToFeishuCard(text string) (string, error) {
+	elements := buildCardElements(text)
+
+	card := map[string]any{
+		"config": map[string]any{
+			"wide_screen_mode": true,
+		},
+		"elements": elements,
+	}
+
+	data, err := json.Marshal(card)
+	return string(data), err
+}
+
+// buildCardElements splits content into div/markdown + table elements for Feishu card.
+// If there are multiple tables, all tables are rendered as markdown (Feishu limit).
+func buildCardElements(content string) []cardElement {
+	// First, count all tables
+	tableMatches := reTable.FindAllStringSubmatchIndex(content, -1)
+	hasMultipleTables := len(tableMatches) > maxTablesInCard
+
+	var elements []cardElement
+	lastEnd := 0
+
+	// Process all tables
+	for _, m := range tableMatches {
+		// Add content before table
+		before := content[lastEnd:m[0]]
+		if strings.TrimSpace(before) != "" {
+			elements = append(elements, splitHeadings(before)...)
+		}
+
+		// Add table element
+		tableText := content[m[0]:m[1]]
+		if hasMultipleTables {
+			// Multiple tables: render as markdown
+			elements = append(elements, cardElement{"tag": "markdown", "content": tableText})
+		} else {
+			// Single table: try to parse as Feishu table
+			tableEl := parseMarkdownTable(tableText)
+			if tableEl != nil {
+				elements = append(elements, tableEl)
+			} else {
+				elements = append(elements, cardElement{"tag": "markdown", "content": tableText})
+			}
+		}
+
+		lastEnd = m[1]
+	}
+
+	// Add remaining content
+	remaining := content[lastEnd:]
+	if strings.TrimSpace(remaining) != "" {
+		elements = append(elements, splitHeadings(remaining)...)
+	}
+
+	if len(elements) == 0 {
+		return []cardElement{{"tag": "markdown", "content": content}}
+	}
+
+	return elements
+}
+
+// splitHeadings splits content by headings, converting headings to div elements.
+func splitHeadings(content string) []cardElement {
+	// Protect code blocks from heading parsing
+	protected := content
+	codeBlocks := make(map[string]string)
+	for i, m := range reCodeBlock.FindAllString(content, -1) {
+		placeholder := "\x00CODE" + string(rune('0'+i)) + "\x00"
+		codeBlocks[placeholder] = m
+		protected = strings.Replace(protected, m, placeholder, 1)
+	}
+
+	var elements []cardElement
+	lastEnd := 0
+
+	for _, m := range reHeading.FindAllStringSubmatchIndex(protected, -1) {
+		// Add content before heading
+		before := strings.TrimSpace(protected[lastEnd:m[0]])
+		if before != "" {
+			elements = append(elements, cardElement{"tag": "markdown", "content": before})
+		}
+
+		// Add heading as div with bold text
+		headingText := strings.TrimSpace(protected[m[4]:m[5]])
+		elements = append(elements, cardElement{
+			"tag": "div",
+			"text": map[string]any{
+				"tag":     "lark_md",
+				"content": "**" + headingText + "**",
+			},
+		})
+
+		lastEnd = m[1]
+	}
+
+	// Add remaining content
+	remaining := strings.TrimSpace(protected[lastEnd:])
+	if remaining != "" {
+		elements = append(elements, cardElement{"tag": "markdown", "content": remaining})
+	}
+
+	// Restore code blocks
+	for placeholder, code := range codeBlocks {
+		for i := range elements {
+			if el, ok := elements[i]["content"].(string); ok {
+				elements[i]["content"] = strings.Replace(el, placeholder, code, -1)
+			}
+		}
+	}
+
+	if len(elements) == 0 {
+		return []cardElement{{"tag": "markdown", "content": content}}
+	}
+
+	return elements
+}
+
+// parseMarkdownTable parses a markdown table into a Feishu table element.
+func parseMarkdownTable(tableText string) cardElement {
+	lines := strings.Split(strings.TrimSpace(tableText), "\n")
+	if len(lines) < 3 {
+		return nil
+	}
+
+	// Parse header line
+	headers := parseTableRow(lines[0])
+	if len(headers) == 0 {
+		return nil
+	}
+
+	// Skip separator line (line 1)
+
+	// Parse data rows (limited)
+	var rows []map[string]any
+	for i := 2; i < len(lines) && len(rows) < maxRowsInTable; i++ {
+		cells := parseTableRow(lines[i])
+		if len(cells) == 0 {
+			continue
+		}
+		row := make(map[string]any)
+		for j, cell := range cells {
+			if j < len(headers) {
+				row[getColumnName(j)] = cell
+			}
+		}
+		rows = append(rows, row)
+	}
+
+	// Build columns
+	columns := make([]cardColumn, len(headers))
+	for i, h := range headers {
+		columns[i] = cardColumn{
+			Tag:         "column",
+			Name:        getColumnName(i),
+			DisplayName: h,
+			Width:       "auto",
+		}
+	}
+
+	return cardElement{
+		"tag":       "table",
+		"page_size": len(rows) + 1,
+		"columns":   columns,
+		"rows":      rows,
+	}
+}
+
+// parseTableRow parses a single markdown table row into cells.
+func parseTableRow(line string) []string {
+	line = strings.TrimSpace(line)
+	line = strings.TrimPrefix(line, "|")
+	line = strings.TrimSuffix(line, "|")
+
+	parts := strings.Split(line, "|")
+	cells := make([]string, 0, len(parts))
+	for _, p := range parts {
+		cells = append(cells, strings.TrimSpace(p))
+	}
+	return cells
+}
+
+// getColumnName returns Feishu table column name by index (c0, c1, c2, ...).
+func getColumnName(index int) string {
+	if index < 10 {
+		return "c" + string(rune('0'+index))
+	}
+	// For indices >= 10, use letter notation
+	return "c" + string(rune('a'+index-10))
+}
+
+// buildFeishuContent converts content to Feishu message format.
+// Returns (msgType, jsonPayload, error).
+func buildFeishuContent(content string) (string, string, error) {
+	cardPayload, err := markdownToFeishuCard(content)
+	if err == nil {
+		return larkim.MsgTypeInteractive, cardPayload, nil
+	}
+	// Fallback to plain text
+	payload, err := json.Marshal(map[string]string{"text": content})
+	if err != nil {
+		return "", "", err
+	}
+	return larkim.MsgTypeText, string(payload), nil
+}