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/scenario-form.jsx

@@ -359,7 +359,14 @@ export default function ScenarioForm() {
    * activity boundary. Delegates to the exported executeEpisodeDone pipeline.
    */
   async function handleDoneForNowPromotion(targetNodeId, onImmediateGraphUpdate) {
-    if (!targetNodeId || !findings?.length) return;
+    if (!targetNodeId) return;
+
+    // Gate: only invoke episode processing when the active target has focused contributions.
+    // Scenario-wide findings no longer determine whether an empty target enters episode processing.
+    const hasActiveTargetContent = (focusedContributions ?? []).some(
+      (c) => c.targetNodeId === targetNodeId || c.originatingTargetNodeId === targetNodeId,
+    );
+    if (!hasActiveTargetContent) return;
 
     // In-flight guard: exactly-once enforcement
     if (doneInProgressRef.current) return;