refactor: improve error handling and response formatting in API

internal/utils/strutils/ansi/ansi.go

@@ -1,6 +1,8 @@
 package ansi
 
-import "regexp"
+import (
+	"regexp"
+)
 
 var ansiRegexp = regexp.MustCompile(`\x1b\[[0-9;]*m`)
 
@@ -43,11 +45,3 @@ func WithANSI(s string, ansi string) string {
 func StripANSI(s string) string {
 	return ansiRegexp.ReplaceAllString(s, "")
 }
-
-var ToHTMLClass = map[string]string{
-	"[91": "log-red",
-	"[92": "log-green",
-	"[93": "log-yellow",
-	"[96": "log-cyan",
-	"[97": "log-white",
-}

internal/utils/strutils/format.go

@@ -5,8 +5,6 @@ import (
 	"math"
 	"strconv"
 	"time"
-
-	"github.com/yusing/go-proxy/internal/utils/strutils/ansi"
 )
 
 // AppendDuration appends a duration to a buffer with the following format:
@@ -215,13 +213,6 @@ func AppendByteSize[T ~int | ~uint | ~int64 | ~uint64 | ~float64](size T, buf []
 	return buf
 }
 
-func DoYouMean(s string) string {
-	if s == "" {
-		return ""
-	}
-	return "Did you mean " + ansi.Info(s) + "?"
-}
-
 func Pluralize(n int64) string {
 	if n > 1 {
 		return "s"