chore: remove duplicate _truncateText from LorasControls/CheckpointsControls, add backend test for civitai_model_id filter

static/js/components/controls/LorasControls.js

@@ -144,16 +144,6 @@ export class LorasControls extends PageControls {
         await resetAndReload();
     }
     
-    /**
-     * Helper to truncate text with ellipsis
-     * @param {string} text - Text to truncate
-     * @param {number} maxLength - Maximum length before truncating
-     * @returns {string} - Truncated text
-     */
-    _truncateText(text, maxLength) {
-        return text.length > maxLength ? text.substring(0, maxLength - 3) + '...' : text;
-    }
-    
     /**
      * Initialize the alphabet bar component
      */