p0: anchors test includes alias spans

scripts/check-anchors.mjs

@@ -29,14 +29,29 @@ async function walk(dir) {
   return out;
 }
 
-// Contrat : .reading p[id^="p-"]
+// Contrat :
+// - paragraphes citables : .reading p[id^="p-"]
+// - alias web-natifs :    .reading span.para-alias[id^="p-"]
 function extractIds(html) {
   if (!html.includes('class="reading"')) return [];
-  const ids = [];
-  const re = /<p\b[^>]*\sid="(p-[^"]+)"/g;
-  let m;
-  while ((m = re.exec(html))) ids.push(m[1]);
 
+  const ids = [];
+  let m;
+
+  // 1) IDs principaux (paragraphes)
+  const reP = /<p\b[^>]*\sid="(p-[^"]+)"/g;
+  while ((m = reP.exec(html))) ids.push(m[1]);
+
+  // 2) IDs alias (spans injectés)
+  // cas A : id="..." avant class="...para-alias..."
+  const reA1 = /<span\b[^>]*\bid="(p-[^"]+)"[^>]*\bclass="[^"]*\bpara-alias\b[^"]*"/g;
+  while ((m = reA1.exec(html))) ids.push(m[1]);
+
+  // cas B : class="...para-alias..." avant id="..."
+  const reA2 = /<span\b[^>]*\bclass="[^"]*\bpara-alias\b[^"]*"[^>]*\bid="(p-[^"]+)"/g;
+  while ((m = reA2.exec(html))) ids.push(m[1]);
+
+  // Dé-doublonnage (on garde un ordre stable)
   const seen = new Set();
   const uniq = [];
   for (const id of ids) {