implemented storing of user's language as well as loading

frontend/src/App.svelte

@@ -1,5 +1,4 @@
 <script>
-    import { onMount } from 'svelte';
     import { Router, Route } from 'svelte-tiny-router';
 
     import { loadTranslation } from './translations.svelte.js';
@@ -39,10 +38,11 @@
 
     let translations_ready = $state(false);
 
-    onMount(async () => {
-        await loadTranslation('de','Login');
+    async function load(){
+        loadTheme(user.theme);
+        await loadTranslation(user.language?user.language:'de');
         translations_ready = true;
-    });
+    }
 
     function loadTheme(name){
         if (!name) return;
@@ -56,7 +56,7 @@
         next();
     }
 
-    $effect(() => loadTheme(user.theme));
+    $effect(load);
 </script>
 
 {#if translations_ready }

user/src/main/java/de/srsoftware/umbrella/user/sqlite/SqliteDB.java

@@ -98,12 +98,26 @@ CREATE TABLE IF NOT EXISTS {0} (
 			case 3:
 				createUserTables();
 				createLoginServiceTables();
+            case 4:
+                createLanguageColumn();
 		}
 
-		return setCurrentVersion(4);
+		return setCurrentVersion(5);
 
 	}
 
+    private void createLanguageColumn() {
+        var sql = "ALTER TABLE {0} ADD COLUMN {1} VARCHAR(10)";
+        try {
+            var stmt = db.prepareStatement(format(sql,TABLE_USERS,LANGUAGE));
+            stmt.execute();
+            stmt.close();
+        } catch (SQLException e) {
+            LOG.log(ERROR,"Failed to create column {1} in {0}",TABLE_USERS, LANGUAGE,e);
+            throw new RuntimeException(e);
+        }
+    }
+
 
     private void createUserTables() {
 		PasswordHasher<String> hasher;
@@ -448,13 +462,13 @@ CREATE TABLE IF NOT EXISTS {0} (
 			Long id = user.id();
             var email = user.email() == null ? null : user.email().toString();
 			if (id<1){
-				insertInto(TABLE_USERS,LOGIN, PASS, THEME, EMAIL)
-						.values(user.name(), user.hashedPassword(), user.theme(), email)
+				insertInto(TABLE_USERS,LOGIN, PASS, THEME, EMAIL, LANGUAGE)
+						.values(user.name(), user.hashedPassword(), user.theme(), email, user.language())
 						.execute(db)
 						.close();
 			} else {
-				replaceInto(TABLE_USERS, ID, LOGIN, PASS, THEME, EMAIL, LAST_LOGOFF)
-						.values(id, user.name(), user.hashedPassword(), user.theme(), email, user.lastLogoff())
+				replaceInto(TABLE_USERS, ID, LOGIN, PASS, THEME, EMAIL, LAST_LOGOFF, LANGUAGE)
+						.values(id, user.name(), user.hashedPassword(), user.theme(), email, user.lastLogoff(), user.language())
 						.execute(db)
 						.close();
 			}
@@ -513,7 +527,7 @@ CREATE TABLE IF NOT EXISTS {0} (
 				rs.getString(EMAIL) instanceof String addr && !addr.isBlank() ? new EmailAddress(addr) : null,
 				Password.of(rs.getString(PASS)),
 				rs.getString(THEME),
-				"de", // TODO: save in DB
+                rs.getString(LANGUAGE),
 				perms,
 				rs.getLong(LAST_LOGOFF)
 		);