fix(download): accept HuggingFace blob URLs in download dialog

detectUrlType only matched /resolve/ links, so pasting a HF web preview
(/blob/) URL fell through to direct-http and surfaced a misleading
'Invalid CivitAI URL format' error. Treat blob URLs as hf-resolve.

static/js/managers/DownloadManager.js

@@ -489,8 +489,9 @@ export class DownloadManager {
             return { type: 'civitai' };
         }
 
-        // Hugging Face resolve URL → direct file
+        // Hugging Face resolve/blob URL → direct file
-        const hfResolveMatch = trimmed.match(/huggingface\.co\/([^/\s]+\/[^/\s]+)\/resolve\/([^/\s]+)\/(.+)/i);
+        // "blob" is the web preview page; it maps 1:1 to the "resolve" download URL
+        const hfResolveMatch = trimmed.match(/huggingface\.co\/([^/\s]+\/[^/\s]+)\/(?:resolve|blob)\/([^/\s]+)\/(.+)/i);
         if (hfResolveMatch) {
             return {
                 type: 'hf-resolve',

tests/frontend/utils/hfUrlDetection.test.js

@@ -55,6 +55,18 @@ describe('DownloadManager.detectUrlType — HF URL detection', () => {
         });
     });
 
+    it('detects HF blob (web preview) URL as resolve', () => {
+        const result = DownloadManager.detectUrlType(
+            'https://huggingface.co/Comfy-Org/z_image_turbo/blob/main/split_files/diffusion_models/z_image_turbo_bf16.safetensors'
+        );
+        expect(result).toEqual({
+            type: 'hf-resolve',
+            repo: 'Comfy-Org/z_image_turbo',
+            revision: 'main',
+            filename: 'split_files/diffusion_models/z_image_turbo_bf16.safetensors',
+        });
+    });
+
     it('detects CivitAI URL', () => {
         const result = DownloadManager.detectUrlType(
             'https://civitai.com/models/123/some-model'