Revert "feat: allow earlier evidence to be revised"

This reverts commit 13b14fd01a.

components/scenario-form.jsx

@@ -100,16 +100,6 @@ export function ScenarioResultPanels({ status, result }) {
   );
 }
 
-// ── Spinner for revision loading overlay ─────────────────────
-function RevisionSpinner() {
-  return (
-    <span
-      className="inline-block h-4 w-4 border-[2px] border-gray-300 border-t-amber-600 rounded-full"
-      style={{ animation: "spin 1s linear infinite" }}
-    />
-  );
-}
-
 // ── Message pools ───────────────────────────────────────────
 const INITIAL_MESSAGES = [
   { min: 0, text: "Reading your situation" },
@@ -125,13 +115,6 @@ const UPDATE_MESSAGES = [
   { min: 45, text: "Choosing the next question" },
 ];
 
-const REVISION_MESSAGES = [
-  { min: 0, text: "Reading what changed" },
-  { min: 10, text: "Rebuilding the investigation" },
-  { min: 25, text: "Checking what this affects" },
-  { min: 45, text: "Choosing the next justified question" },
-];
-
 function useLoadingStatus(messages, isLoading) {
   const [elapsed, setElapsed] = useState(0);
   const startRef = useRef(null);
@@ -206,12 +189,8 @@ export default function ScenarioForm() {
   const [updateError, setUpdateError] = useState(null);
   const [updateResult, setUpdateResult] = useState(null);
   const [lastSubmittedAnswer, setLastSubmittedAnswer] = useState("");
-  const [isRevisionLoading, setIsRevisionLoading] = useState(false);
-  const [revisionTurnIndex, setRevisionTurnIndex] = useState(-1);
   const textareaRef = useRef(null);
 
-  // Loading state tracking for normal update vs revision
-  const isAnyUpdateLoading = updateStatus === "loading" || isRevisionLoading;
   const { elapsed: startElapsed, currentMessage: startMsg } = useLoadingStatus(
     INITIAL_MESSAGES,
     status === "loading"
@@ -219,12 +198,7 @@ export default function ScenarioForm() {
 
   const { elapsed: updateElapsed, currentMessage: updateMsg } = useLoadingStatus(
     UPDATE_MESSAGES,
-    updateStatus === "loading" && !isRevisionLoading
-  );
-
-  const { elapsed: revisionElapsed, currentMessage: revisionMsg } = useLoadingStatus(
-    REVISION_MESSAGES,
-    isRevisionLoading
+    updateStatus === "loading"
   );
 
   const handleSubmit = async (e) => {
@@ -257,7 +231,7 @@ export default function ScenarioForm() {
     }
   };
 
-  const handleUpdate = async (e, options = {}) => {
+  const handleUpdate = async (e) => {
     e.preventDefault();
 
     // Guard empty answer before showing loading state
@@ -267,25 +241,19 @@ export default function ScenarioForm() {
       return;
     }
 
-    const isRevision = !!options.graphCheckpoint;
-    const turnIndex = options.turnIndex ?? revisionTurnIndex;
-
     setUpdateStatus("loading");
-    setIsRevisionLoading(isRevision);
-    if (isRevision) setRevisionTurnIndex(turnIndex);
     setUpdateError(null);
     setLastSubmittedAnswer(answer.trim());
 
     const submission = await submitAnswerForUpdateCase(fetch, {
-      situationGraph: options.graphCheckpoint ?? result?.situationGraph,
-      previousQuestion: isRevision ? undefined : result?.selectedQuestion,
+      situationGraph: result?.situationGraph,
+      previousQuestion: result?.selectedQuestion,
       answer,
     });
 
     if (submission.skipped) {
       setUpdateStatus("error");
       setUpdateError(submission.data);
-      setIsRevisionLoading(false);
       return;
     }
 
@@ -293,11 +261,10 @@ export default function ScenarioForm() {
       const outcome = submission.data;
 
       if (submission.ok && outcome.success) {
-        if (isRevision) setIsRevisionLoading(false);
         setUpdateStatus("success");
         setUpdateResult({
           ...outcome,
-          previousSituationGraph: options.graphCheckpoint ?? result?.situationGraph ?? null,
+          previousSituationGraph: result?.situationGraph ?? null,
         });
         setResult((current) => ({
           ...current,
@@ -313,12 +280,10 @@ export default function ScenarioForm() {
         setAnswer("");
       } else {
         setUpdateStatus("error");
-        setIsRevisionLoading(false);
         setUpdateError(outcome);
       }
     } catch (err) {
       setUpdateStatus("error");
-      setIsRevisionLoading(false);
       setUpdateError({ error: err.message || "Network request failed" });
     }
   };
@@ -351,7 +316,7 @@ export default function ScenarioForm() {
       </form>
 
       {/* ── Initial analysis loading card ─────────────── */}
-      {status === "loading" && !isRevisionLoading && (
+      {status === "loading" && (
         <LoadingOverlay
           isLoading={true}
           elapsed={startElapsed}
@@ -360,17 +325,6 @@ export default function ScenarioForm() {
         />
       )}
 
-      {/* ── Revision loading card ─────────────────────── */}
-      {isRevisionLoading && (
-        <div className="rounded-lg border border-amber-200 bg-amber-50 px-5 py-6" role="status" aria-busy="true">
-          <div className="flex items-center gap-3">
-            <RevisionSpinner />
-            <span className="text-base font-medium text-amber-900">Considering your revised answer</span>
-          </div>
-          <p className="mt-2 text-sm text-amber-700">{revisionMsg}</p>
-        </div>
-      )}
-
       {/* ── Main result workspace ─────────────────────── */}
       {(status === "success" || status === "error" || updateStatus === "success") && (
         <ReasoningWorkspace
@@ -388,7 +342,6 @@ export default function ScenarioForm() {
           setAnswer={setAnswer}
           onAnswerSubmit={handleUpdate}
           lastSubmittedAnswer={lastSubmittedAnswer}
-          isRevisionLoading={isRevisionLoading}
         />
       )}