[GH-15906][MM-22844] Redesign message notification emails. (#17184)

* Redesign message notification emails.

* Fix tests and linter.

* Fix tests

* Fix tests

* gofmt.

* Fix date separator

* Update html files

* Remove date for message notification email.

* Modify subtitle for mentions and direct and group messages.

* Fix lint error

* Fix DM subtitle.

* Fixing translations

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Jesús Espino <jespinog@gmail.com>

app/user.go

@@ -875,48 +875,11 @@ func getFont(initialFont string) (*truetype.Font, error) {
 }
 
 func (a *App) GetProfileImage(user *model.User) ([]byte, bool, *model.AppError) {
-	if *a.Config().FileSettings.DriverName == "" {
-		img, appErr := a.GetDefaultProfileImage(user)
-		if appErr != nil {
-			return nil, false, appErr
-		}
-		return img, false, nil
-	}
-
-	path := "users/" + user.Id + "/profile.png"
-
-	data, err := a.ReadFile(path)
-	if err != nil {
-		img, appErr := a.GetDefaultProfileImage(user)
-		if appErr != nil {
-			return nil, false, appErr
-		}
-
-		if user.LastPictureUpdate == 0 {
-			if _, err := a.WriteFile(bytes.NewReader(img), path); err != nil {
-				return nil, false, err
-			}
-		}
-		return img, true, nil
-	}
-
-	return data, false, nil
+	return a.srv.GetProfileImage(user)
 }
 
 func (a *App) GetDefaultProfileImage(user *model.User) ([]byte, *model.AppError) {
-	var img []byte
-	var appErr *model.AppError
-
-	if user.IsBot {
-		img = model.BotDefaultImage
-		appErr = nil
-	} else {
-		img, appErr = CreateProfileImage(user.Username, user.Id, *a.Config().FileSettings.InitialFont)
-	}
-	if appErr != nil {
-		return nil, appErr
-	}
-	return img, nil
+	return a.srv.GetDefaultProfileImage(user)
 }
 
 func (a *App) SetDefaultProfileImage(user *model.User) *model.AppError {