[MM-57826] Make sure the original errors are wrapped when AppErrors are returned (#26771)

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

server/channels/app/post.go

@@ -2544,7 +2544,7 @@ func (a *App) MoveThread(c request.CTX, postID string, sourceChannelID, channelI
 
 	err := a.ValidateMoveOrCopy(c, wpl, originalChannel, targetChannel, user)
 	if err != nil {
-		return model.NewAppError("validateMoveOrCopy", "app.post.move_thread_command.error", nil, err.Error(), http.StatusBadRequest)
+		return model.NewAppError("validateMoveOrCopy", "app.post.move_thread_command.error", nil, "", http.StatusBadRequest).Wrap(err)
 	}
 
 	var targetTeam *model.Team
@@ -2576,7 +2576,7 @@ func (a *App) MoveThread(c request.CTX, postID string, sourceChannelID, channelI
 
 	T, err := i18n.GetTranslationsBySystemLocale()
 	if err != nil {
-		return model.NewAppError("MoveThread", "app.post.move_thread_command.error", nil, err.Error(), http.StatusInternalServerError)
+		return model.NewAppError("MoveThread", "app.post.move_thread_command.error", nil, "", http.StatusInternalServerError).Wrap(err)
 	}
 
 	ephemeralPostProps := model.StringInterface{