feat: 优化web

internal/auth/oauth2/errors.go

@@ -0,0 +1,10 @@
+package oauth2
+
+import "errors"
+
+// JSON 登录签发授权码时与 Authorize 对齐校验。
+var (
+	ErrInvalidClient      = errors.New("oauth2: invalid client_id")
+	ErrInvalidRedirectURI = errors.New("oauth2: invalid redirect_uri")
+	ErrPKCERequired       = errors.New("oauth2: invalid code_challenge or code_challenge_method")
+)