Add sharing function

inference/m4singer/gradio/share_btn.py

@@ -44,9 +44,9 @@ share_js = """async () => {
     
     const outputMusic_name = outputMusic_src.split('/').pop();
     let titleTxt = outputMusic_name;
-    //if(titleTxt.length > 100){
-    //    titleTxt = titleTxt.slice(0, 100) + ' ...';
-    //}
+    if(titleTxt.length > 30){
+        titleTxt = 'demo';
+    }
     const shareBtnEl = gradioEl.querySelector('#share-btn');
     const shareIconEl = gradioEl.querySelector('#share-btn-share-icon');
     const loadingIconEl = gradioEl.querySelector('#share-btn-loading-icon');