feat(goldset): AI second-opinion per item (QA aid) — compare vs human tag

The chair wanted an independent recommendation beside each tag, to reconsider
his own judgments. Adds a NON-ground-truth AI second-opinion:

- schema: halacha_goldset.ai_is_holding / ai_correct_type / ai_rationale /
  ai_generated_at (additive).
- db.goldset_set_ai_recommendation + goldset_list now returns the ai_* fields.
- scripts/goldset_ai_recommend.py — local claude_session judges is_holding +
  type + a one-line rationale per item, INDEPENDENTLY (own legal rubric).
  Independent of the rule-based validators #81.8 measures → no circularity.
  Never auto-applied; QA aid only.
- web-ui: each card shows "🤖 המלצת AI: הלכה/לא · type" + rationale and an
  agreement/disagreement chip vs the human tag (amber on disagree); a
  "⚠ אי-הסכמות AI (N)" filter to review only the conflicts.

Methodology note kept explicit: the human stays the ground truth; the AI is a
prompt to reconsider, not to copy.

Verified: tsc --noEmit 0; generator stores recs and flags disagreements with
existing human tags.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web-ui/src/components/goldset/goldset-panel.tsx

@@ -67,6 +67,16 @@ function isTagged(it: GoldsetItem): boolean {
   return it.is_holding !== null && it.quote_complete !== null && !!it.correct_type;
 }
 
+// The AI second-opinion disagrees with the human tag (on is_holding or type).
+function aiDisagrees(it: GoldsetItem): boolean {
+  if (!it.ai_generated_at) return false;
+  const holdDiff = it.is_holding !== null && it.ai_is_holding !== null
+    && it.is_holding !== it.ai_is_holding;
+  const typeDiff = !!it.correct_type && !!it.ai_correct_type
+    && it.correct_type !== it.ai_correct_type;
+  return holdDiff || typeDiff;
+}
+
 // ─── Score panel ──────────────────────────────────────────────────────────────
 
 function ScorePanel({ batch }: { batch: string }) {
@@ -248,6 +258,36 @@ function TagCard({
         “{it.supporting_quote}”
       </blockquote>
 
+      {it.ai_generated_at && (() => {
+        const aiType = TYPES.find((t) => t.value === it.ai_correct_type)?.label ?? it.ai_correct_type;
+        const holdDisagree = it.is_holding !== null && it.ai_is_holding !== null
+          && it.is_holding !== it.ai_is_holding;
+        const typeDisagree = !!it.correct_type && !!it.ai_correct_type
+          && it.correct_type !== it.ai_correct_type;
+        const anyTag = it.is_holding !== null || !!it.correct_type;
+        return (
+          <div className={`rounded-md border p-2.5 text-[0.78rem] space-y-1
+            ${holdDisagree ? "border-amber-400 bg-amber-50" : "border-rule bg-rule-soft/20"}`} dir="rtl">
+            <div className="flex items-center gap-2 flex-wrap">
+              <span className="font-semibold text-navy">🤖 המלצת AI:</span>
+              <span>{it.ai_is_holding ? "הלכה" : "לא הלכה"}</span>
+              {aiType && <span className="text-ink-muted">· {aiType}</span>}
+              {anyTag && (
+                <span className={`ms-auto text-[0.7rem] px-1.5 py-0.5 rounded
+                  ${holdDisagree || typeDisagree
+                    ? "bg-amber-100 text-amber-800"
+                    : "bg-emerald-50 text-emerald-700"}`}>
+                  {holdDisagree ? "⚠ חולק על 'הלכה/לא'"
+                    : typeDisagree ? "⚠ חולק על הסוג"
+                    : "✓ מסכים איתך"}
+                </span>
+              )}
+            </div>
+            {it.ai_rationale && <div className="text-ink-soft leading-relaxed">{it.ai_rationale}</div>}
+          </div>
+        );
+      })()}
+
       <div className="grid gap-3 sm:grid-cols-3 pt-1 border-t border-rule-soft">
         {/* is_holding */}
         <div>
@@ -308,11 +348,13 @@ export function GoldsetPanel() {
   const createSample = useCreateGoldsetSample(batch);
   const [focusedId, setFocusedId] = useState<string | null>(null);
   const [hideTagged, setHideTagged] = useState(false);
+  const [disagreeOnly, setDisagreeOnly] = useState(false);
   const [sourceFilter, setSourceFilter] =
     useState<"all" | "court_ruling" | "appeals_committee">("all");
 
   const items = useMemo(() => data?.items ?? [], [data]);
   const taggedCount = items.filter(isTagged).length;
+  const disagreeCount = items.filter(aiDisagrees).length;
   const sourceCounts = useMemo(() => ({
     court_ruling: items.filter((i) => i.source_type === "court_ruling").length,
     appeals_committee: items.filter((i) => i.source_type === "appeals_committee").length,
@@ -321,11 +363,12 @@ export function GoldsetPanel() {
     let v = items;
     if (sourceFilter !== "all") v = v.filter((i) => i.source_type === sourceFilter);
     if (hideTagged) v = v.filter((i) => !isTagged(i));
+    if (disagreeOnly) v = v.filter(aiDisagrees);
     // group-sort: כל פסקי-הדין יחד, ואז כל החלטות ועדת-הערר (הפרדה ברורה).
     const order = (s: string | null) =>
       s === "court_ruling" ? 0 : s === "appeals_committee" ? 1 : 2;
     return [...v].sort((a, b) => order(a.source_type) - order(b.source_type));
-  }, [items, hideTagged, sourceFilter]);
+  }, [items, hideTagged, sourceFilter, disagreeOnly]);
 
   const focused = focusedId ? visible.find((i) => i.id === focusedId) ?? null : null;
 
@@ -424,7 +467,14 @@ export function GoldsetPanel() {
           {" "}· הלכה <kbd className="bg-rule-soft px-1.5 rounded">H</kbd> / לא <kbd className="bg-rule-soft px-1.5 rounded">N</kbd>
           {" "}· ציטוט שלם <kbd className="bg-rule-soft px-1.5 rounded">C</kbd> / קטוע <kbd className="bg-rule-soft px-1.5 rounded">X</kbd>
         </span>
-        <Button size="sm" variant="ghost" className="ms-auto" onClick={() => setHideTagged((v) => !v)}>
+        {disagreeCount > 0 && (
+          <Button size="sm" variant={disagreeOnly ? "default" : "ghost"}
+            className={disagreeOnly ? "ms-auto bg-amber-500 text-white hover:bg-amber-600" : "ms-auto text-amber-700"}
+            onClick={() => setDisagreeOnly((v) => !v)}>
+            ⚠ אי-הסכמות AI ({disagreeCount})
+          </Button>
+        )}
+        <Button size="sm" variant="ghost" className={disagreeCount > 0 ? "" : "ms-auto"} onClick={() => setHideTagged((v) => !v)}>
           {hideTagged ? "הצג הכל" : "הסתר מתויגים"}
         </Button>
       </div>

web-ui/src/lib/api/goldset.ts

@@ -29,6 +29,11 @@ export type GoldsetItem = {
   case_number: string | null;
   case_name: string | null;
   source_type: string | null;  // 'court_ruling' | 'appeals_committee' | ''
+  // AI second-opinion (QA aid — independent, not ground truth, not auto-applied)
+  ai_is_holding: boolean | null;
+  ai_correct_type: string;
+  ai_rationale: string;
+  ai_generated_at: string | null;
 };
 
 export type GoldsetScore = {