fix: assuntos sem duplicatas em inglês no cartão e no filtro

web/wall.html

@@ -1277,11 +1277,7 @@ function showCard(data) {
   // this piece's dc.subject, one chip each (accent/case duplicates folded)
   const tagsEl = document.getElementById('card-tags');
   tagsEl.replaceChildren();
-  const seen = new Set();
+  subjectsOf(meta).forEach(t => {
-  [].concat(meta.subject || []).forEach(t => {
-    const k = deburr(String(t)).trim();
-    if (!k || seen.has(k)) return;
-    seen.add(k);
     const chip = document.createElement('span');
     chip.textContent = t;
     tagsEl.appendChild(chip);
@@ -1408,6 +1404,20 @@ const authorKey = name => deburr(name).replace(/[^a-z0-9 ]/g, ' ').split(/\s+/).
 const subjectKey = t => deburr(String(t)).replace(/\s+/g, ' ').trim();
 const SUBJECT_MIN = 20;
 
+// the catalogue repeats most subjects in English ("Railroads - Buildings and
+// structures - Porto Velho (Rondônia, Brazil)" beside "Ferrovias - …"); keep the
+// Portuguese side. An English-only record keeps what it has rather than none.
+const EN_WORD = new RegExp('\\b(?:brazil|state|buildings?|structures|and|of|the|railroads?|rivers?|bridges|streets|church(?:es)?|photographs?|public|dwellings|portraits?|stations?|construction|region|waterfalls|plazas|mountains|women|history|life|hospitals?|views?|colon(?:y|ies)|slaves|panoramic|aerial|harbors?|ports?|forts?|islands?|beaches|houses|schools?|palaces?|squares?|paraguay|amazon|falls|lakes?|people|children|boats|ships|trains?|roads?|cities|city|towns?|landscapes?|factories|industry)\\b', 'i');
+function subjectsOf(meta) {
+  const seen = new Set(), all = [];
+  [].concat((meta || {}).subject || []).forEach(t => {
+    const k = subjectKey(t);
+    if (k && !seen.has(k)) { seen.add(k); all.push(String(t).trim()); }
+  });
+  const pt = all.filter(t => !EN_WORD.test(t));
+  return pt.length ? pt : all;
+}
+
 function setupFilters(mapData) {
   const entries = Object.values(mapData.map);
   const instCounts = new Map(), typeCounts = new Map(), authorGroups = new Map(), subjectGroups = new Map();
@@ -1418,8 +1428,7 @@ function setupFilters(mapData) {
     if (meta.community) instCounts.set(meta.community, (instCounts.get(meta.community) || 0) + 1);
     const t = cleanType(meta.type);
     if (t) typeCounts.set(t, (typeCounts.get(t) || 0) + 1);
-    new Set([].concat(meta.subject || []).map(subjectKey)).forEach(k => {
+    subjectsOf(meta).map(subjectKey).forEach(k => {
-      if (!k) return;
       subjectGroups.set(k, (subjectGroups.get(k) || 0) + 1);
     });
     const a = cleanAuthor(meta.contributor);
@@ -1460,7 +1469,7 @@ function setupFilters(mapData) {
   });
 
   const subjectNames = new Map(); // key → a readable spelling
-  entries.forEach(e => [].concat((e.meta || {}).subject || []).forEach(t => {
+  entries.forEach(e => subjectsOf(e.meta).forEach(t => {
     const k = subjectKey(t);
     if (k && subjectGroups.get(k) >= SUBJECT_MIN && !subjectNames.has(k)) subjectNames.set(k, String(t).trim());
   }));
@@ -1502,7 +1511,7 @@ function setupFilters(mapData) {
     const a = cleanAuthor(meta.contributor);
     m.userData._author = a ? authorKey(a) : '';
     m.userData._type = cleanType(meta.type);
-    m.userData._subjects = new Set([].concat(meta.subject || []).map(subjectKey));
+    m.userData._subjects = new Set(subjectsOf(meta).map(subjectKey));
     // one haystack per piece: every metadata field, not a chosen few
     // the handle is the map's key, not a field of meta — it still has to be
     // searchable (people paste a handle or its number straight into the box)