fix: edit content html build

scripts/push.js

@@ -206,8 +206,10 @@ function mdToHtmlBody(md, titleEn, assetIdByFilename) {
       let alt = '';
       if (i + 1 < lines.length) {
         const cap = lines[i + 1].trim().match(/^\*(.+)\*$/);
-        if (cap) { alt = cap[1]; i++; }
+        if (cap) { alt = cap[1].trim(); i++; }
       }
+      // Placeholder alt "alt" carries no real caption — drop the annotation.
+      if (alt === 'alt') alt = '';
       const assetId = assetIdByFilename ? assetIdByFilename.get(filename) : null;
       const src = assetId != null ? `asset://${assetId}` : '';
       if (alt) {
@@ -217,6 +219,9 @@ function mdToHtmlBody(md, titleEn, assetIdByFilename) {
       }
       i++; continue;
     }
+    // Skip the "（无图片）" placeholder harvest.js writes when an article has
+    // no images — it should not appear in the pushed HTML body.
+    if (trimmed === '（无图片）') { i++; continue; }
     // Blockquote > text
     if (trimmed.match(/^>\s*(.*)$/)) {
       flush();