feat(folder-browser): show create path message and update model index

- Update HuggingFace author index metadata (file count, repo entries)
- Style empty folder browser state with grid layout and monospace path display
- When a non-existent subfolder is typed, inform user the path will be created during download

web/css/resolver-main.css

@@ -5864,11 +5864,25 @@
     background: rgba(255,255,255,0.045);
 }
 .mr-folder-browser-empty {
+    display: grid;
+    gap: 6px;
     padding: 24px 12px;
     color: var(--mr-text-muted);
     text-align: center;
     font-size: 11px;
 }
+.mr-folder-browser-empty-path {
+    justify-self: center;
+    max-width: 100%;
+    padding: 5px 7px;
+    border-radius: 6px;
+    background: rgba(114,211,138,0.08);
+    color: var(--mr-text);
+    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
+    font-size: 10px;
+    overflow-wrap: anywhere;
+    word-break: break-word;
+}
 @media (max-width: 720px) {
     .mr-download-target-list.mr-download-folder-browser {
         width: min(100%, calc(100vw - 32px));

web/resolver/search/download_target_methods.js

@@ -2132,6 +2132,16 @@ export const downloadTargetMethods = {
                     </div>
                 `;
             }).join('');
+            const typedFolderPath = normalizeSubfolderPath(rawFilter) || rawFilter;
+            const emptyHtml = typedFolderPath
+                ? `
+                    <div class="mr-folder-browser-empty mr-folder-browser-empty-create">
+                        <span>No existing folders match this filter.</span>
+                        <span>During download, this folder path will be created:</span>
+                        <span class="mr-folder-browser-empty-path">${this.escapeHtml(typedFolderPath)}</span>
+                    </div>
+                `
+                : `<div class="mr-folder-browser-empty">No folders match this filter.</div>`;
 
             targetEl.classList.add('mr-download-folder-browser');
             targetEl.innerHTML = `
@@ -2140,7 +2150,7 @@ export const downloadTargetMethods = {
                     <span class="mr-folder-browser-preview-path">${this.escapeHtml(previewPath)}</span>
                 </div>
                 <div class="mr-folder-browser-scroll">
-                    ${rootHtml || `<div class="mr-folder-browser-empty">No folders match this filter.</div>`}
+                    ${rootHtml || emptyHtml}
                 </div>
             `;
             showFloatingSubfolderList();