fix(confidence-engine): align explored question status language

components/reasoning-workspace.jsx

@@ -558,7 +558,7 @@ function hasGenuineCompletion(graph) {
 function CompletionCard({ summary }) {
   return (
     <div className="rounded-lg border border-green-300 bg-green-50 px-5 py-6 text-center">
-      <h2 className="mb-1 text-sm font-bold uppercase tracking-wide text-green-700">Investigation complete</h2>
+      <h2 className="mb-1 text-sm font-bold uppercase tracking-wide text-green-700">All questions explored</h2>
       <p className="text-base text-gray-800 mb-3">The available evidence supports the following understanding.</p>
       {summary && (
         <div className="mt-4 text-left rounded-md bg-white/60 px-4 py-3 border border-green-100">
@@ -2014,7 +2014,7 @@ export default function ReasoningWorkspace({
                                   <p className="mt-1.5 text-xs leading-snug text-gray-500">{node.description}</p>
                                 )}
                                 <div className="mt-2 flex items-center gap-3">
-                                  <span className="text-[10px] uppercase tracking-wider text-green-600">Clarified</span>
+                                  <span className="text-[10px] uppercase tracking-wider text-green-600">Explored</span>
                                   <button
                                     onClick={() => {
                                       const nextGraph = reopenResolvedUnknown(graph, node.id);