refactor: Enhance checkpoint download functionality with new modal and manager integration

static/js/components/controls/CheckpointsControls.js

@@ -2,6 +2,7 @@
 import { PageControls } from './PageControls.js';
 import { loadMoreCheckpoints, resetAndReload, refreshCheckpoints, fetchCivitai } from '../../api/checkpointApi.js';
 import { showToast } from '../../utils/uiHelpers.js';
+import { CheckpointDownloadManager } from '../../managers/CheckpointDownloadManager.js';
 
 /**
  * CheckpointsControls class - Extends PageControls for Checkpoint-specific functionality
@@ -11,6 +12,9 @@ export class CheckpointsControls extends PageControls {
         // Initialize with 'checkpoints' page type
         super('checkpoints');
         
+        // Initialize checkpoint download manager
+        this.downloadManager = new CheckpointDownloadManager();
+        
         // Register API methods specific to the Checkpoints page
         this.registerCheckpointsAPI();
     }
@@ -38,6 +42,11 @@ export class CheckpointsControls extends PageControls {
                 return await fetchCivitai();
             },
             
+            // Add show download modal functionality
+            showDownloadModal: () => {
+                this.downloadManager.showDownloadModal();
+            },
+            
             // No clearCustomFilter implementation is needed for checkpoints
             // as custom filters are currently only used for LoRAs
             clearCustomFilter: async () => {