feat(nav): הסרת דף מדגם-זהב (goldset) מה-UI

הכיול החד-פעמי של ולידטורי חילוץ-ההלכות (#81.8) הסתיים — הוסר מה-UI:
- web-ui/src/app/goldset/page.tsx (הדף)
- web-ui/src/components/goldset/goldset-panel.tsx (הרכיב)
- web-ui/src/lib/api/goldset.ts (מודול ה-API)
- הקישור "מדגם-זהב" מתפריט "פסיקה" + השטחת התת-כותרת "ניתוח וכיול"
  (נותר רק "מפת הקורפוס" → רשימה שטוחה)
- ניקוי אזכורי gold-set מהערות approvals/page.tsx ו-chair.ts

ה-backend נשאר במכוון: טבלת halacha_goldset, ה-endpoints (/api/goldset*)
ופונקציות ה-DB משמשים את סקריפטי ה-eval/benchmark ומחזיקים נתוני-תיוג
אנושיים — אין מחיקת DB ואין שבירת סקריפטים. /api/chair/pending ממילא לא
כלל goldset, אז אין קישור שבור במרכז-האישורים.

Invariants: G2 (הסרת יכולת-UF מיותרת ללא יצירת מסלול מקביל).

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

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

@@ -3,8 +3,8 @@ import { apiRequest } from "./client";
 
 /**
  * Chair approval center (INV-G10) — aggregates every pending human-gate item
- * (halacha approvals, missing precedents, unapplied feedback, QA-failed cases,
- * gold-set review) so nothing Dafna must approve is forgotten.
+ * (halacha approvals, missing precedents, unapplied feedback, QA-failed cases)
+ * so nothing Dafna must approve is forgotten.
  *
  * Hand-typed (not from the generated types.ts) because /api/chair/pending is a
  * new endpoint; switch to the generated type after the next `npm run api:types`.

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

@@ -1,113 +0,0 @@
-/**
- * Gold-set tagging API (#81.7 / #81.8).
- *
- * The chair/Dafna manually labels a stratified sample of halachot
- * (is_holding / correct_type / quote_complete). Those human labels are the
- * ground truth used to measure the extraction validators and recalibrate the
- * auto-approve threshold. Endpoints under /api/goldset.
- */
-import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
-import { apiRequest } from "./client";
-
-export type GoldsetItem = {
-  id: string;
-  halacha_id: string;
-  // human tags (null until tagged)
-  is_holding: boolean | null;
-  correct_type: string;
-  quote_complete: boolean | null;
-  tagged_by: string;
-  tagged_at: string | null;
-  // halacha content + the machine's own labels
-  rule_statement: string;
-  supporting_quote: string;
-  reasoning_summary: string;
-  rule_type: string;
-  // authority over the committee — DERIVED from the source (INV-DM7), read-only.
-  authority?: "binding" | "persuasive" | null;
-  confidence: number | null;
-  quality_flags?: string[];
-  review_status: string;
-  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 = {
-  batch: string;
-  total: number;
-  labeled: number;
-  validators: Record<
-    string,
-    { precision: number; recall: number; f1: number; tp: number; fp: number; fn: number; tn: number }
-  >;
-};
-
-export type GoldsetTag = {
-  is_holding?: boolean | null;
-  correct_type?: string;
-  quote_complete?: boolean | null;
-};
-
-const keys = {
-  all: ["goldset"] as const,
-  list: (batch: string) => ["goldset", "list", batch] as const,
-  score: (batch: string) => ["goldset", "score", batch] as const,
-};
-
-export function useGoldset(batch = "default") {
-  return useQuery({
-    queryKey: keys.list(batch),
-    queryFn: ({ signal }) =>
-      apiRequest<{ items: GoldsetItem[]; batch: string }>(
-        `/api/goldset?batch=${encodeURIComponent(batch)}`,
-        { signal },
-      ),
-    staleTime: 5_000,
-    refetchOnMount: "always",
-  });
-}
-
-export function useGoldsetScore(batch = "default") {
-  return useQuery({
-    queryKey: keys.score(batch),
-    queryFn: ({ signal }) =>
-      apiRequest<GoldsetScore>(
-        `/api/goldset/score?batch=${encodeURIComponent(batch)}`,
-        { signal },
-      ),
-    staleTime: 5_000,
-  });
-}
-
-export function useTagGoldset(batch = "default") {
-  const qc = useQueryClient();
-  return useMutation({
-    mutationFn: ({ id, tag }: { id: string; tag: GoldsetTag }) =>
-      apiRequest<{ ok: boolean }>(`/api/goldset/${encodeURIComponent(id)}`, {
-        method: "PATCH",
-        body: { ...tag, tagged_by: "chair" },
-      }),
-    onSuccess: () => {
-      qc.invalidateQueries({ queryKey: keys.list(batch) });
-      qc.invalidateQueries({ queryKey: keys.score(batch) });
-    },
-  });
-}
-
-export function useCreateGoldsetSample(batch = "default") {
-  const qc = useQueryClient();
-  return useMutation({
-    mutationFn: (n: number) =>
-      apiRequest<{ batch: string; inserted: number; total: number }>(
-        "/api/goldset/sample",
-        { method: "POST", body: { n, batch } },
-      ),
-    onSuccess: () => qc.invalidateQueries({ queryKey: keys.list(batch) }),
-  });
-}