split some strings into common file; use lang file to setup page

lang.go

@@ -26,6 +26,13 @@ func (ls *adminLangs) getOptions(chosen string) (string, []string) {
 	return chosenLang, opts
 }
 
+type commonLangs map[string]commonLang
+
+type commonLang struct {
+	Meta    langMeta    `json:"meta"`
+	Strings langSection `json:"strings"`
+}
+
 type adminLang struct {
 	Meta            langMeta                  `json:"meta"`
 	Strings         langSection               `json:"strings"`
@@ -77,6 +84,35 @@ type emailLang struct {
 	WelcomeEmail  langSection `json:"welcomeEmail"`
 }
 
+type setupLangs map[string]setupLang
+
+type setupLang struct {
+	Meta               langMeta    `json:"meta"`
+	Strings            langSection `json:"strings"`
+	StartPage          langSection `json:"startPage"`
+	EndPage            langSection `json:"endPage"`
+	Language           langSection `json:"language"`
+	Login              langSection `json:"login"`
+	JellyfinEmby       langSection `json:"jellyfinEmby"`
+	Email              langSection `json:"email"`
+	Notifications      langSection `json:"notifications"`
+	PasswordResets     langSection `json:"passwordResets"`
+	InviteEmails       langSection `json:"inviteEmails"`
+	PasswordValidation langSection `json:"passwordValidation"`
+	HelpMessages       langSection `json:"helpMessages"`
+}
+
+func (ls *setupLangs) getOptions(chosen string) (string, []string) {
+	opts := make([]string, len(*ls))
+	chosenLang := (*ls)[chosen].Meta.Name
+	i := 0
+	for _, lang := range *ls {
+		opts[i] = lang.Meta.Name
+		i++
+	}
+	return chosenLang, opts
+}
+
 type langSection map[string]string
 
 func (el langSection) format(field string, vals ...string) string {