debug: log content_len，改用 JSON.stringify

TODO.md

@@ -29,5 +29,4 @@
 
 每個階段都會加上明確的 log，並確保即使部分功能未完成也能降級執行、不會中斷 pipeline。
 
-每次執行後請貼 log，我會協助 debug。
+每次執行後請貼 log，我會協助 debug。
-

app/git.js

@@ -10,6 +10,7 @@ export async function commitAndPush(workspace) {
   try {
     const fullPath = path.join(workspace, FINDINGS_PATH);
     const content = fs.readFileSync(fullPath, 'utf8');
+    console.log(`  [debug] FINDINGS_PATH=${FINDINGS_PATH} branch=${process.env.PR_HEAD_BRANCH} token=${process.env.GITEA_TOKEN ? '***' : 'EMPTY'}`);
     const result = await commitFile(
       FINDINGS_PATH,
       content,
@@ -18,6 +19,7 @@ export async function commitAndPush(workspace) {
     const commitHash = result.commit?.sha?.slice(0, 7) || 'unknown';
     console.log(`  ✅ persisted findings  commit=${commitHash}  push=${process.env.PR_HEAD_BRANCH}`);
   } catch (e) {
-    console.log(`  ⚠️  Runner failed: commit/push 失敗: ${e.message}`);
+    const detail = e.response?.data ? JSON.stringify(e.response.data) : e.message;
+    console.log(`  ⚠️  Runner failed: commit/push 失敗: ${e.response?.status || ''} ${detail}`);
   }
 }

app/gitea.js

@@ -28,7 +28,9 @@ export async function commitFile(filePath, content, message) {
   try {
     const existing = await axios.get(`${url}?ref=${PR_HEAD_BRANCH}`, { headers: headers(), httpsAgent, timeout: 15000 });
     sha = existing.data.sha;
-  } catch {
+    console.log(`  [debug] 取得現有檔案 SHA=${sha}`);
+  } catch (e) {
+    console.log(`  [debug] 檔案不存在，將建立新檔案: ${e.response?.status || e.message}`);
     sha = undefined;
   }
 
@@ -39,13 +41,15 @@ export async function commitFile(filePath, content, message) {
     ...(sha ? { sha } : {}),
   };
 
+  console.log(`  [debug] ${sha ? 'PUT' : 'POST'} ${url} branch=${PR_HEAD_BRANCH} content_len=${encoded.length}`);
   const resp = await axios.request({
     method: sha ? 'put' : 'post',
     url,
-    headers: headers(),
+    headers: { ...headers(), 'Content-Type': 'application/json' },
     httpsAgent,
     timeout: 30000,
-    data: payload,
+    data: JSON.stringify(payload),
   });
+  console.log(`  [debug] response status=${resp.status}`);
   return resp.data;
 }