fix(metablogizer): Use emancipated flag for Expose/Unpublish button

- Changed button logic from exp.vhost_exists to exp.emancipated
- Non-emancipated sites now correctly show "Expose" button
- Emancipated sites show "Unpublish" button
- vhost_exists was incorrectly true for some non-emancipated sites

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/luci-app-metablogizer/htdocs/luci-static/resources/view/metablogizer/dashboard.js

@@ -201,8 +201,8 @@ return view.extend({
 					'title': _('Upload content'),
 					'click': ui.createHandlerFn(self, 'showUploadModal', site)
 				}, _('Upload')),
-				// Expose/Unpublish button
-				exp.vhost_exists ?
+				// Expose/Unpublish button - use emancipated flag, not vhost_exists
+				exp.emancipated ?
 					E('button', {
 						'class': 'cbi-button cbi-button-remove',
 						'style': 'padding:0.25em 0.5em; margin:2px',