refactor(confidence-engine): remove legacy workspace persistence

components/reasoning-workspace.jsx

@@ -117,37 +117,6 @@ function ContinueLaterBanner({ onRestart }) {
   );
 }
 
-// ── Session persistence hook (Phase 3) ────────────────────────
-
-function useSessionPersistence() {
-  const [sessionReady, setSessionReady] = useState(false);
-  const sessionKey = "confidence-engine-session";
-
-  function saveSession(state) {
-    if (typeof sessionStorage === "undefined") return;
-    try {
-      sessionStorage.setItem(sessionKey, JSON.stringify(state));
-    } catch (_) { /* quota or disabled — ignore silently */ }
-  }
-
-  function loadSession() {
-    if (typeof sessionStorage === "undefined") return null;
-    try {
-      const raw = sessionStorage.getItem(sessionKey);
-      return raw ? JSON.parse(raw) : null;
-    } catch (_) {
-      return null;
-    }
-  }
-
-  function clearSession() {
-    if (typeof sessionStorage === "undefined") return;
-    try { sessionStorage.removeItem(sessionKey); } catch (_) {}
-  }
-
-  return { saveSession, loadSession, clearSession, sessionReady: true };
-}
-
 // ── Shared focused-question body (extracted from OpenQuestionsPanel) ──
 
 function FocusedQuestionBody({
@@ -1289,22 +1258,6 @@ export default function ReasoningWorkspace({
   const [initialReflectionActive, setInitialReflectionActive] = useState(false);
   const [postAnalyseStatus, setPostAnalyseStatus] = useState(null);
 
-  const { saveSession, loadSession } = useSessionPersistence();
-
-  // Persist workspace state on every successful update (Phase 3)
-  useEffect(() => {
-    if (updateStatus === "success" && result?.situationGraph) {
-      saveSession({
-        scenario,
-        situationGraph: result.situationGraph,
-        selectedQuestion: result.selectedQuestion,
-        summary: result.summary || propUnderstanding,
-        updatedAt: new Date().toISOString(),
-        focusedContributions,
-      });
-    }
-  }, [updateStatus, result, focusedContributions]);
-
   // Capture the current selected question at submit time (not from a stale ref)
   const capturePendingTurn = (selectedQuestion, answerText) => {
     if (!selectedQuestion || !answerText?.trim()) return null;
@@ -1402,23 +1355,6 @@ export default function ReasoningWorkspace({
   const [focusedInvestigations, setFocusedInvestigations] = useState({});
   const [focusedAnswer, setFocusedAnswer] = useState("");
 
-  // ── Persist focused contributions immediately after deconstruct success ────
-  const lastPersistedContribCount = useRef(0);
-
-  useEffect(() => {
-    if (!graph) return;
-    if (focusedContributions.length === lastPersistedContribCount.current) return;
-    lastPersistedContribCount.current = focusedContributions.length;
-    saveSession({
-      scenario,
-      situationGraph: graph,
-      selectedQuestion: result?.selectedQuestion,
-      summary: result?.summary || propUnderstanding,
-      updatedAt: new Date().toISOString(),
-      focusedContributions,
-    });
-  }, [focusedContributions]);
-
   function getFocusedInvestigation() {
     if (!focusedPresentationItemId) return null;
     return focusedInvestigations[focusedPresentationItemId] || null;