fix: clone repo before Step3/4 to read findings and exclusions from head branch

app/main.js

@@ -3,7 +3,7 @@ import { loadRoles, getRoleIntro } from './roles.js';
 import { getPRDiff, postComment } from './gitea.js';
 import { analyzeWithRole, loadOldFindings, mergeFindings, sortByLevel, deduplicateWithAI, loadExclusions, applyExclusions } from './findings.js';
 import { saveFindings, postOldFindingsComment, postNewNonCriticalComment, postNewCriticalComments } from './comments.js';
-import { commitAndPush } from './git.js';
+import { cloneRepo, commitAndPush } from './git.js';
 
 const WORKSPACE = process.env.GITHUB_WORKSPACE || '/workspace';
 
@@ -65,7 +65,14 @@ async function main() {
 
   // Step3: 讀取舊 findings，合併去重（含 AI 語意去重）
   console.log('\n🔀 Step3: Findings 合併');
-  const oldFindings = loadOldFindings(WORKSPACE);
+  // Clone repo 以讀取舊 findings 與排除清單
+  let repoDir;
+  try {
+    repoDir = cloneRepo(WORKSPACE);
+  } catch (e) {
+    console.log(`  ⚠️  clone repo 失敗（繼續執行）: ${e.message}`);
+  }
+  const oldFindings = loadOldFindings(repoDir || WORKSPACE);
   const mergedFindings = mergeFindings(oldFindings, newFindings);
   console.log(`  Step3 merged findings total=${mergedFindings.length}`);
 
@@ -76,7 +83,7 @@ async function main() {
 
   // Step4: 讀取排除問題檔案，過濾 PR 問題表格
   console.log('\n🚫 Step4: 排除問題過濾');
-  const exclusions = loadExclusions(WORKSPACE);
+  const exclusions = loadExclusions(repoDir || WORKSPACE);
   const filtered = applyExclusions(sorted, exclusions);
   console.log(`  Step4 完成: findings total=${filtered.length}`);