增加社区列表接口，任务相关接口修改

internal/pkg/errs/error.go

@@ -6,16 +6,14 @@ import (
 )
 
 type err struct {
-	code   int
-	reason Reason
-	msg    string
+	code Reason
+	msg  string
 }
 
-func New(code int, reason Reason, message any) error {
+func New(code Reason, message any) error {
 	return err{
-		code:   code,
-		reason: reason,
-		msg:    cast.ToString(message),
+		code: code,
+		msg:  cast.ToString(message),
 	}
 }
 
@@ -25,15 +23,10 @@ func (e err) Error() string {
 }
 
 // Code return code
-func (e err) Code() int {
+func (e err) Code() Reason {
 	return e.code
 }
 
-// Reason return reason
-func (e err) Reason() Reason {
-	return e.reason
-}
-
 // Message return message
 func (e err) Message() string {
 	return e.msg