fix: write findings to review dir

app/main.js

@@ -88,7 +88,8 @@ async function main() {
 
   // Step6: 寫入 findings.json，依序發布 comment
   console.log('\n📝 Step5: Findings 寫入與 Comment 發布');
-  saveFindings(WORKSPACE, filtered);
+  const reviewDir = repoDir || WORKSPACE;
+  saveFindings(WORKSPACE, filtered, reviewDir);
   try {
     await postOldFindingsComment(filtered);
     await postNewNonCriticalComment(filtered);
@@ -102,7 +103,7 @@ async function main() {
   console.log('\n🔎 Step6: JSON 格式驗證');
   const missingPaths = [];
   for (const relPath of [FINDINGS_PATH, EXCLUSIONS_PATH]) {
-    const fullPath = path.join(repoDir || WORKSPACE, relPath);
+    const fullPath = path.join(reviewDir, relPath);
     try {
       const result = await validateJSONArrayFile(fullPath, relPath);
       if (!result.exists) missingPaths.push({ fullPath, relPath });
@@ -117,7 +118,7 @@ async function main() {
 
   // Step7: commit/push findings.json 到來源分支
   console.log('\n💾 Step7: 記憶區 Commit/Push');
-  await commitAndPush(WORKSPACE, repoDir);
+  await commitAndPush(WORKSPACE, repoDir || WORKSPACE);
 
   // Step9: 有 critical 問題則 exit 1
   console.log('\n🚦 Step8: 嚴重問題檢查');