修复三个 bug：清理 API 响应中的 null 字段、改用 Google Translate 提升翻译质量、过滤 README 中的分隔线

backend/src/routes/repos.js

@@ -9,7 +9,8 @@ function computeDaysUntilDeletion(row) {
 }
 
 function formatRepo(row) {
-  return { ...row, days_until_deletion: computeDaysUntilDeletion(row) };
+  const { scraped_at, is_today, ...rest } = row;
+  return { ...rest, days_until_deletion: computeDaysUntilDeletion(row) };
 }
 
 function getRepos(req, res) {

backend/src/scraper.js

@@ -89,13 +89,14 @@ function extractFeaturesSection(readme, description) {
     if (result && result.length > 20) return result;
   }
 
-  // 兜底：取README正文第一段有意义的文字（跳过徽章行）
+  // 兜底：取README正文第一段有意义的文字（跳过徽章行和分隔线）
   const lines = readme.split('\n');
   const paragraphs = [];
   for (const line of lines) {
     const trimmed = line.trim();
     if (!trimmed || trimmed.startsWith('#') || trimmed.startsWith('!') || trimmed.startsWith('[!') || trimmed.startsWith('<')) continue;
     if (trimmed.startsWith('[![') || trimmed.match(/^\[!\[/)) continue;
+    if (/^[-=]{3,}$/.test(trimmed)) continue;
     if (trimmed.length > 40) paragraphs.push(trimmed);
     if (paragraphs.length >= 3) break;
   }

backend/src/translate.js

@@ -6,8 +6,8 @@ const HTML_TAG_RE = /<[^>]{1,100}>/g;
 function cleanText(text) {
   if (!text) return text;
   return text
-    .replace(HTML_TAG_RE, ' ')   // 去除 HTML 标签
-    .replace(/&[a-z]+;/gi, ' ')  // 去除 HTML 实体
+    .replace(HTML_TAG_RE, ' ')
+    .replace(/&[a-z]+;/gi, ' ')
     .replace(/\s+/g, ' ')
     .trim();
 }
@@ -15,21 +15,25 @@ function cleanText(text) {
 async function translate(text) {
   const cleaned = cleanText(text);
   if (!cleaned || cleaned.length < 5) return cleaned || text;
-  if (CJK_RE.test(cleaned)) return cleaned; // 已含中文，跳过
+  if (CJK_RE.test(cleaned)) return cleaned;
 
   try {
-    const res = await axios.get('https://api.mymemory.translated.net/get', {
-      params: { q: cleaned.slice(0, 500), langpair: 'en|zh-CN' },
-      headers: { 'User-Agent': 'github-trending-app/1.0' },
+    const res = await axios.get('https://translate.googleapis.com/translate_a/single', {
+      params: {
+        client: 'gtx',
+        sl: 'en',
+        tl: 'zh-CN',
+        dt: 't',
+        q: cleaned.slice(0, 500),
+      },
+      headers: { 'User-Agent': 'Mozilla/5.0' },
       timeout: 10000,
     });
-    const translated = res.data?.responseData?.translatedText;
-    if (!translated || translated === cleaned || translated.startsWith('PLEASE SELECT')) {
-      return cleaned;
-    }
+    const translated = res.data?.[0]?.map(s => s?.[0]).filter(Boolean).join('');
+    if (!translated || translated === cleaned) return cleaned;
     return translated.trim();
   } catch {
-    return cleaned; // 失败静默降级，返回清理后原文
+    return cleaned;
   }
 }