feat: use simple chars for bar

bot.go

@@ -163,18 +163,19 @@ func handleChatInfoCmd(c tele.Context) error {
 }
 
 func drawBar(progress float64, length int) string {
-	barChars := []rune("░▒▓█")
+	barChars := []rune("·-=")
 
 	if length <= 0 {
 		return ""
 	}
 	step := 1 / float64(length)
-	buf := make([]rune, length)
+	buf := make([]rune, length+2)
+	buf[0], buf[length+1] = '[', ']'
 	for i := 0; i < length; i++ {
 		fill := (progress - float64(i)*step) / step
 		fill = math.Min(math.Max(fill, 0), 1)
 		idx := int(math.Round(fill * float64(len(barChars)-1)))
-		buf[i] = barChars[idx]
+		buf[i+1] = barChars[idx]
 	}
 	return string(buf)
 }
@@ -183,7 +184,7 @@ func drawBarForTrafficRecord(r stats.VnstatTrafficRecord) string {
 	effective := lo.Max([]uint64{r.Rx, r.Tx})
 	max := config.MonthlyTrafficLimitGiB
 	ratio := float64(effective) / 1024 / 1024 / 1024 / float64(max)
-	return fmt.Sprintf("%s `%2.0f%%`", drawBar(ratio, 16), ratio*100)
+	return fmt.Sprintf("`%s %2.0f%%`", drawBar(ratio, 25), ratio*100)
 }
 
 func handleYearProgressCmd(c tele.Context) error {
@@ -193,9 +194,9 @@ func handleYearProgressCmd(c tele.Context) error {
 	elapsed := time.Since(yearStart)
 	ratio := float64(elapsed) / float64(yearDur)
 
-	replyText := []string{
-		fmt.Sprintf("`%d is %2.0f%% complete.`", time.Now().Year(), ratio*100),
-		drawBar(ratio, 20),
-	}
-	return c.Reply(strings.Join(replyText, "\n"), &tele.SendOptions{ParseMode: tele.ModeMarkdown})
+	replyText := fmt.Sprintf(
+		"\n%d is <b>%2.0f%%</b> complete.\n<pre>%s</pre>",
+		time.Now().Year(), ratio*100, drawBar(ratio, 25),
+	)
+	return c.Reply(replyText, &tele.SendOptions{ParseMode: tele.ModeHTML})
 }