[GH-13968] Add "skip_slack_parsing" to PostActionIntegration… (#13976)

app/integration_action.go

@@ -239,11 +239,16 @@ func (a *App) DoPostActionWithCookie(postId, actionId, userId, selectedOption st
 
 	if response.EphemeralText != "" {
 		ephemeralPost := &model.Post{
-			Message:   model.ParseSlackLinksToMarkdown(response.EphemeralText),
+			Message:   response.EphemeralText,
 			ChannelId: upstreamRequest.ChannelId,
 			RootId:    rootPostId,
 			UserId:    userId,
 		}
+
+		if !response.SkipSlackParsing {
+			ephemeralPost.Message = model.ParseSlackLinksToMarkdown(response.EphemeralText)
+		}
+
 		for key, value := range retain {
 			ephemeralPost.AddProp(key, value)
 		}

model/integration_action.go

@@ -175,6 +175,7 @@ type PostActionIntegrationRequest struct {
 type PostActionIntegrationResponse struct {
 	Update           *Post  `json:"update"`
 	EphemeralText    string `json:"ephemeral_text"`
+	SkipSlackParsing bool   `json:"skip_slack_parsing"` // Set to `true` to skip the Slack-compatibility handling of Text.
 }
 
 type PostActionAPIResponse struct {