ver. 0.278: Settings + Languages frontend migration, bug fix get_single_settings_value

- Add cached frontend methods to existing Domain repositories (allSettings, getSingleValue, defaultLanguage, activeLanguages, translations)
- Convert front\factory\Settings and Languages to facades delegating to Domain repositories
- Fix get_single_settings_value() - was hardcoded to 'firm_name', now uses $param correctly
- Add CacheHandler stub methods (get/set/exists) to test bootstrap
- Establish architectural rule: Domain classes are shared between admin and frontend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

autoload/front/factory/class.Settings.php

@@ -1,43 +1,22 @@
 <?php
 namespace front\factory;
 
+/**
+ * Fasada delegujaca do Domain\Settings\SettingsRepository.
+ */
 class Settings
 {
-  public static function settings_details( $admin = false )
-  {
-    global $mdb;
-
-    $cacheHandler = new \CacheHandler();
-    $cacheKey = "\front\factory\Settings::settings_details";
-
-    $objectData = $cacheHandler->get($cacheKey);
-
-    if ( !$objectData or $admin )
+    public static function settings_details($admin = false)
     {
-      $results = $mdb -> select( 'pp_settings', '*' );
-      if ( is_array( $results ) ) foreach ( $results as $row )
-        $settings[ $row['param'] ] = $row['value'];
-
-      $cacheHandler -> set( $cacheKey, $settings );
+        global $mdb;
+        $repo = new \Domain\Settings\SettingsRepository($mdb);
+        return $repo->allSettings($admin);
     }
-    else
+
+    public static function get_single_settings_value($param)
     {
-      return unserialize( $objectData );
+        global $mdb;
+        $repo = new \Domain\Settings\SettingsRepository($mdb);
+        return $repo->getSingleValue($param);
     }
-
-    return $settings;
-  }
-
-  static public function get_single_settings_value( $param ) {
-
-    global $mdb;
-
-    if ( !$value = \Cache::fetch( "get_single_settings_value:$param" ) ) {
-
-      $value = $mdb -> get( 'pp_settings', 'value', [ 'param' => 'firm_name' ] );
-      \Cache::store( "get_single_settings_value:$param", $value );
-    }
-
-    return $value;
-  }
 }