fix(confidence-engine): align empty done and reopen state

- Empty Done immediate transition now sets node.status to resolved
  alongside resolvedNodeIds/doneForNowIds — same canonical parked
  shape as populated Done (no server call required)
- Clarified-question Re-open removes target from doneForNowIds so
  the question visibly returns to Open Questions
- Immediate graph mutation creates new node objects immutably
  (React state semantics), touching only the target node

components/reasoning-workspace.jsx

@@ -1981,6 +1981,7 @@ export default function ReasoningWorkspace({
                                     onClick={() => {
                                       const nextGraph = reopenResolvedUnknown(graph, node.id);
                                       onSituationGraphChange(nextGraph);
+                                      setDoneForNowIds((prev) => prev.filter((id) => id !== node.id));
                                     }}
                                     style={{ cursor: "pointer" }}
                                     className="text-[10px] font-medium uppercase tracking-wider text-amber-600 hover:text-amber-700 underline transition"
@@ -2256,8 +2257,12 @@ export default function ReasoningWorkspace({
                               if (currentGraph) {
                                 const resolvedIds = new Set(currentGraph.resolvedNodeIds || []);
                                 resolvedIds.add(focusedPresentationItemId);
+                                const nextNodes = (currentGraph.nodes || []).map((n) =>
+                                  n.id === focusedPresentationItemId ? { ...n, status: "resolved" } : n,
+                                );
                                 onImmediateGraphChange({
                                   ...currentGraph,
+                                  nodes: nextNodes,
                                   resolvedNodeIds: Array.from(resolvedIds),
                                 });
                               }