Adding optional devmode for environments where SMTP is not configured

[Engerrs]

No description provided.

[mutantsan]

Leads to 500 error without login. Should check for it and return 400 bad request if not here.

@auth.route("/get-user-code", methods=["POST"])
def get_2fa_user_code() -> Response:
    if not ah.is_2fa_dev_mode_enabled():
        return tk.abort(404, tk._("Not found"))

    user_name = tk.request.form.get("login")

    if not user_name:
        return tk.abort(400, tk._("Missing 'login' parameter"))

    user = model.User.get(user_name)

    if not user or not user.email:
        return tk.abort(404, tk._("User not found or has no email set"))

    code = utils.get_email_verification_code(user)

    log.info("Providing 2FA code %s for user %s in dev mode", code, user.name)

    return jsonify({"success": True, "result": {"code": code}})

[mutantsan]

Move to initialize, as other containers.

this.devModeCodeBlock = $("#dev-mode-user-code");

Then

_showUserCode: function () {
    if (this.devModeCodeBlock.length !== 1) {
        return;
    }

    $.ajax({
        url: "/mfa/get-user-code",
        method: "POST",
        data: this.form.serialize(),
        success: (response) => {
            if (!response?.success) return;

            this.devModeCodeBlock.find('.code-wrapper').text(response.result.code);
            this.devModeCodeBlock.show();
        },
        error: (resp) => {
            console.error(resp);
        }
    });
},

[mutantsan]

It's not going to work like that. Should be moved to _sendVerificationCode -> complete.

complete: () => {
    this.submitBtn.prop("disabled", false);
    this._showUserCode();
}