fix: port main branch changes to channel subpackages after rebase

Port changes that were applied to the old pkg/channels/*.go files on main
to their new locations in channel subpackages:
- telegram: precompile regex, var transcribedText, GetModelName()
- discord: var transcribedText declaration
- onebot: resp.Body.Close(), "canceled" spelling, remove empty line
- slack: named return values in parseSlackChatID
- wecom: remove sendMarkdownMessage dead code
- whatsapp: resp.Body.Close() after Dial
- gateway/helpers: remove unused errors import

pkg/channels/telegram/telegram.go

@@ -25,6 +25,19 @@ import (
 	"github.com/sipeed/picoclaw/pkg/utils"
 )
 
+var (
+	reHeading    = regexp.MustCompile(`^#{1,6}\s+(.+)$`)
+	reBlockquote = regexp.MustCompile(`^>\s*(.*)$`)
+	reLink       = regexp.MustCompile(`\[([^\]]+)\]\(([^)]+)\)`)
+	reBoldStar   = regexp.MustCompile(`\*\*(.+?)\*\*`)
+	reBoldUnder  = regexp.MustCompile(`__(.+?)__`)
+	reItalic     = regexp.MustCompile(`_([^_]+)_`)
+	reStrike     = regexp.MustCompile(`~~(.+?)~~`)
+	reListItem   = regexp.MustCompile(`^[-*]\s+`)
+	reCodeBlock  = regexp.MustCompile("```[\\w]*\\n?([\\s\\S]*?)```")
+	reInlineCode = regexp.MustCompile("`([^`]+)`")
+)
+
 type TelegramChannel struct {
 	*channels.BaseChannel
 	bot      *telego.Bot
@@ -522,19 +535,18 @@ func markdownToTelegramHTML(text string) string {
 	inlineCodes := extractInlineCodes(text)
 	text = inlineCodes.text
 
-	text = regexp.MustCompile(`^#{1,6}\s+(.+)$`).ReplaceAllString(text, "$1")
+	text = reHeading.ReplaceAllString(text, "$1")
 
-	text = regexp.MustCompile(`^>\s*(.*)$`).ReplaceAllString(text, "$1")
+	text = reBlockquote.ReplaceAllString(text, "$1")
 
 	text = escapeHTML(text)
 
-	text = regexp.MustCompile(`\[([^\]]+)\]\(([^)]+)\)`).ReplaceAllString(text, `<a href="$2">$1</a>`)
+	text = reLink.ReplaceAllString(text, `<a href="$2">$1</a>`)
 
-	text = regexp.MustCompile(`\*\*(.+?)\*\*`).ReplaceAllString(text, "<b>$1</b>")
+	text = reBoldStar.ReplaceAllString(text, "<b>$1</b>")
 
-	text = regexp.MustCompile(`__(.+?)__`).ReplaceAllString(text, "<b>$1</b>")
+	text = reBoldUnder.ReplaceAllString(text, "<b>$1</b>")
 
-	reItalic := regexp.MustCompile(`_([^_]+)_`)
 	text = reItalic.ReplaceAllStringFunc(text, func(s string) string {
 		match := reItalic.FindStringSubmatch(s)
 		if len(match) < 2 {
@@ -543,9 +555,9 @@ func markdownToTelegramHTML(text string) string {
 		return "<i>" + match[1] + "</i>"
 	})
 
-	text = regexp.MustCompile(`~~(.+?)~~`).ReplaceAllString(text, "<s>$1</s>")
+	text = reStrike.ReplaceAllString(text, "<s>$1</s>")
 
-	text = regexp.MustCompile(`^[-*]\s+`).ReplaceAllString(text, "• ")
+	text = reListItem.ReplaceAllString(text, "• ")
 
 	for i, code := range inlineCodes.codes {
 		escaped := escapeHTML(code)
@@ -570,8 +582,7 @@ type codeBlockMatch struct {
 }
 
 func extractCodeBlocks(text string) codeBlockMatch {
-	re := regexp.MustCompile("```[\\w]*\\n?([\\s\\S]*?)```")
-	matches := re.FindAllStringSubmatch(text, -1)
+	matches := reCodeBlock.FindAllStringSubmatch(text, -1)
 
 	codes := make([]string, 0, len(matches))
 	for _, match := range matches {
@@ -579,7 +590,7 @@ func extractCodeBlocks(text string) codeBlockMatch {
 	}
 
 	i := 0
-	text = re.ReplaceAllStringFunc(text, func(m string) string {
+	text = reCodeBlock.ReplaceAllStringFunc(text, func(m string) string {
 		placeholder := fmt.Sprintf("\x00CB%d\x00", i)
 		i++
 		return placeholder
@@ -594,8 +605,7 @@ type inlineCodeMatch struct {
 }
 
 func extractInlineCodes(text string) inlineCodeMatch {
-	re := regexp.MustCompile("`([^`]+)`")
-	matches := re.FindAllStringSubmatch(text, -1)
+	matches := reInlineCode.FindAllStringSubmatch(text, -1)
 
 	codes := make([]string, 0, len(matches))
 	for _, match := range matches {
@@ -603,7 +613,7 @@ func extractInlineCodes(text string) inlineCodeMatch {
 	}
 
 	i := 0
-	text = re.ReplaceAllStringFunc(text, func(m string) string {
+	text = reInlineCode.ReplaceAllStringFunc(text, func(m string) string {
 		placeholder := fmt.Sprintf("\x00IC%d\x00", i)
 		i++
 		return placeholder

pkg/channels/telegram/telegram_commands.go

@@ -81,7 +81,7 @@ func (c *cmd) Show(ctx context.Context, message telego.Message) error {
 	switch args {
 	case "model":
 		response = fmt.Sprintf("Current Model: %s (Provider: %s)",
-			c.config.Agents.Defaults.Model,
+			c.config.Agents.Defaults.GetModelName(),
 			c.config.Agents.Defaults.Provider)
 	case "channel":
 		response = "Current Channel: telegram"
@@ -120,7 +120,7 @@ func (c *cmd) List(ctx context.Context, message telego.Message) error {
 			provider = "configured default"
 		}
 		response = fmt.Sprintf("Configured Model: %s\nProvider: %s\n\nTo change models, update config.yaml",
-			c.config.Agents.Defaults.Model, provider)
+			c.config.Agents.Defaults.GetModelName(), provider)
 
 	case "channels":
 		var enabled []string