fix Always-off (on/off/default safe values) + bump emphasis to 1.375em (v1.4.2)

Helper/OrganonProjectHelper.php

@@ -9,7 +9,11 @@ use Kanboard\Core\Base;
  *
  * Resolves the 3-state "emphasize due date" setting for the CURRENT board (read from the route
  * project_id, which the router populates for pretty URLs before the layout renders):
- *   per-board '1' -> on, '0' -> off, 'default'/absent -> follow the LIVE global default.
+ *   per-board 'on' -> on, 'off' -> off, 'default'/absent -> follow the LIVE global default.
+ *
+ * The stored values are the non-falsy strings 'on'/'off' (not '1'/'0'): Kanboard's
+ * MetadataModel::get() uses `?:`, and PHP treats the string "0" as falsy, so a stored "0" would
+ * come back as the 'default' fallback and "Always off" would never be honored.
  */
 class OrganonProjectHelper extends Base
 {
@@ -31,11 +35,11 @@ class OrganonProjectHelper extends Base
 
         $value = $this->projectMetadataModel->get($project_id, self::EMPHASIZE_KEY, 'default');
 
-        if ($value === '1') {
+        if ($value === 'on') {
             return true;
         }
 
-        if ($value === '0') {
+        if ($value === 'off') {
             return false;
         }