fix: add suggestions for LLM integration tests and code structure improvements in exclusions.json; ensure findings.json is saved with a newline

app/comments.js

@@ -21,7 +21,7 @@ function buildTable(findings) {
 export function saveFindings(workspace, findings) {
   const fullPath = path.join(workspace, FINDINGS_PATH);
   fs.mkdirSync(path.dirname(fullPath), { recursive: true });
-  fs.writeFileSync(fullPath, JSON.stringify(findings, null, 2), 'utf8');
+  fs.writeFileSync(fullPath, JSON.stringify(findings, null, 2) + '\n', 'utf8');
   console.log(`  ✅ findings 寫入: ${fullPath} (${findings.length} 筆)`);
 }