diff --git a/src/components/settings/OllamaTab.tsx b/src/components/settings/OllamaTab.tsx
index a628a314..2a7a47b4 100644
--- a/src/components/settings/OllamaTab.tsx
+++ b/src/components/settings/OllamaTab.tsx
@@ -405,22 +405,24 @@ export default function OllamaTab() {
                                       <button 
                                         onClick={() => runTest(m, inst.normalizedUrl || inst.url)}
                                         disabled={isTesting || batchTesting}
-                                        class={`p-1 rounded hover:bg-gray-200 transition-colors ${isTesting ? 'animate-spin text-blue-500' : 'text-gray-400'}`}
+                                        class={`p-1 rounded hover:bg-gray-200 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#175B37] ${isTesting ? 'animate-spin text-blue-500' : 'text-gray-400'}`}
                                         title="Lancer un test"
+                                        aria-label="Lancer un test"
                                       >
-                                        <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+                                        <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
                                           <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M14.752 11.168l-3.197-2.132A1 1 0 0010 9.87v4.263a1 1 0 001.555.832l3.197-2.132a1 1 0 000-1.664z" />
                                         </svg>
                                       </button>
                                       <button 
                                         onClick={() => toggleManualDisable(m, !!isDisabled)}
-                                        class={`p-1 rounded transition-colors ${isDisabled ? 'text-emerald-500 hover:bg-emerald-50' : 'text-gray-300 hover:text-rose-500 hover:bg-rose-50'}`}
+                                        class={`p-1 rounded transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#175B37] ${isDisabled ? 'text-emerald-500 hover:bg-emerald-50' : 'text-gray-300 hover:text-rose-500 hover:bg-rose-50'}`}
                                         title={isDisabled ? 'Activer le modèle' : 'Désactiver le modèle'}
+                                        aria-label={isDisabled ? 'Activer le modèle' : 'Désactiver le modèle'}
                                       >
                                         {isDisabled ? (
-                                          <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M5 13l4 4L19 7" /></svg>
+                                          <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M5 13l4 4L19 7" /></svg>
                                         ) : (
-                                          <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M6 18L18 6M6 6l12 12" /></svg>
+                                          <svg class="w-3 h-3" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5" d="M6 18L18 6M6 6l12 12" /></svg>
                                         )}
                                       </button>
                                     </div>
@@ -435,14 +437,14 @@ export default function OllamaTab() {
                       )}
                     </div>
                     <div class="flex items-center gap-2">
-                      <button onClick={() => toggleInstance(inst)} class={`text-[10px] font-bold px-3 py-1 rounded-full border transition-colors ${inst.enabled ? 'border-amber-200 text-amber-700 hover:bg-amber-50' : 'border-green-200 text-green-700 hover:bg-green-50'}`}>
+                      <button onClick={() => toggleInstance(inst)} class={`text-[10px] font-bold px-3 py-1 rounded-full border transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#175B37] ${inst.enabled ? 'border-amber-200 text-amber-700 hover:bg-amber-50' : 'border-green-200 text-green-700 hover:bg-green-50'}`}>
                         {inst.enabled ? 'Désactiver' : 'Activer'}
                       </button>
-                      <button onClick={() => startEdit(inst)} class="p-2 text-gray-400 hover:text-gray-600 transition-colors">
-                        <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" /></svg>
+                      <button onClick={() => startEdit(inst)} class="p-2 text-gray-400 hover:text-gray-600 transition-colors rounded-full focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#175B37]" aria-label="Modifier l'instance">
+                        <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" /></svg>
                       </button>
-                      <button onClick={() => deleteInstance(inst.id)} class="p-2 text-gray-400 hover:text-red-600 transition-colors">
-                        <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" /></svg>
+                      <button onClick={() => deleteInstance(inst.id)} class="p-2 text-gray-400 hover:text-red-600 transition-colors rounded-full focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[#175B37]" aria-label="Supprimer l'instance">
+                        <svg class="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" /></svg>
                       </button>
                     </div>
                   </div>