diff --git a/app/templates/patching_import.html b/app/templates/patching_import.html
index 92f1376..95a46df 100644
--- a/app/templates/patching_import.html
+++ b/app/templates/patching_import.html
@@ -266,12 +266,13 @@
     }
 
     function applyFilters(){
-        const fi = (fInter.value || '').trim();
-        const fe = (fEnv.value || '').trim();
+        // Comparaisons case-insensitive (Production == production, etc.)
+        const fi = (fInter.value || '').trim().toLowerCase();
+        const fe = (fEnv.value || '').trim().toLowerCase();
         let visibleCount = 0;
         tbody.querySelectorAll('tr').forEach(tr => {
-            const i = tr.dataset.intervenant || '';
-            const e = tr.dataset.env || '';
+            const i = (tr.dataset.intervenant || '').toLowerCase();
+            const e = (tr.dataset.env || '').toLowerCase();
             const ok = (!fi || i === fi) && (!fe || e === fe);
             if (ok) { tr.classList.remove('row-hidden'); tr.style.display=''; visibleCount++; }
             else    { tr.classList.add('row-hidden'); tr.style.display='none'; }
@@ -281,8 +282,17 @@
     }
 
     function rebuildSelectOptions(sel, values, placeholder){
+        // Dedup case-insensitive : on garde la 1re forme rencontrée comme canonique
+        // (généralement la majuscule "Production" si elle apparaît avant "production")
         const cur = sel.value;
-        const opts = Array.from(new Set(values.filter(x => x))).sort((a,b) => a.localeCompare(b, 'fr', {sensitivity:'base'}));
+        const seen = new Map();   // lowercase -> canonical form
+        for (const v of values) {
+            if (!v) continue;
+            const k = v.toLowerCase();
+            if (!seen.has(k)) seen.set(k, v);
+        }
+        const opts = Array.from(seen.values()).sort((a,b) =>
+            a.localeCompare(b, 'fr', {sensitivity:'base'}));
         sel.innerHTML = '<option value="">' + placeholder + '</option>'
             + opts.map(v => '<option value="' + escapeHTML(v) + '"' + (cur === v ? ' selected' : '') + '>' + escapeHTML(v) + '</option>').join('');
     }