fix: toast on save success/failure, skip toast on print

templates/index.html

@@ -1529,6 +1529,7 @@ function addMessageToolbar(msgDiv) {
     saveBtn.innerHTML = '💾';
     saveBtn.title = 'Save as .md';
     saveBtn.onclick = () => {
+        try {
             const t = getText();
             const blob = new Blob([t], { type: 'text/markdown' });
             const a = document.createElement('a');
@@ -1536,6 +1537,8 @@ function addMessageToolbar(msgDiv) {
             a.download = `caic-response-${Date.now()}.md`;
             a.click();
             URL.revokeObjectURL(a.href);
+            showToast('Saved');
+        } catch(e) { showToast('Save failed'); }
     };
     toolbar.append(copyBtn, printBtn, saveBtn, sep());
     if (!msgDiv.classList.contains('search-result')) {