feat(admin): #304+#323 LLM 검증 UI + 공통 유틸 추출

#323 (LLM 검증 어드민 UI):
- api.ts: getVerifyPending / verifyAll / verifyOne / setRestaurantHidden 추가
- Restaurant 타입에 hidden / hidden_reason / verified_at 추가
- RestaurantsPanel 헤더에 "미검증 N건 + LLM 검증" 버튼 추가
- 테이블에 "검증" 컬럼 추가:
  - hidden=true → "숨김 (사유)" 버튼 (클릭 시 해제)
  - verified_at 있고 visible → "OK" 버튼 (클릭 시 숨김)
  - 미검증 → "미검증" 텍스트

#304 (어드민 공통 유틸):
- lib/admin-utils.ts 신규
  - getAdminToken(): localStorage 직접 접근 통일
  - authHeaders(): 표준 Bearer 헤더
  - consumeSseStream(): SSE 라인 파싱 헬퍼
- colSpan 6 → 7로 검증 컬럼 반영

후속 분리: #329 (admin/page.tsx 전체 분리 + localStorage/SSE 호출 11+곳 교체)

Refs: #304 #323 #322

CHANGELOG.md

@@ -6,6 +6,16 @@
 
 ## 2026-06-15
 
+### 🔧 #291+#292 백엔드 결함 일괄 수정 (v0.1.17)
+- ExtractorService: transcript null/blank 가드 (NPE 방지)
+- PipelineService.processExtract: 진입 시 status='processing' 명시 전이 (SSE/사용자 가시성)
+- PipelineService: geocode 실패 시 좌표/place_id/주소 컬럼을 data에 put하지 않아 upsert COALESCE 보존 의도 명확화
+- GeocodingService.parseRegionFromAddress: 빈 토큰을 region 문자열에서 제거 ('한국||구' 깨짐 방지)
+- VideoService.saveVideosBatch: @Transactional 추가 → batch insert 원자성
+- .gitignore: backend-java/cookies.txt 및 **/cookies.txt
+- 후속 분리: #325 (#291 잔여 MINOR), #326 (parseJson 최적화 + #292 MINOR)
+- Refs: #291 #292 (close)
+
 ### 🧹 #322 LLM 검증으로 잘못된/프랜차이즈 식당 자동 숨김 (v0.1.16)
 - DB 마이그레이션: restaurants에 hidden(NUMBER(1)), hidden_reason(VARCHAR2(120)), verified_at(TIMESTAMP) + idx_restaurants_hidden
 - 도메인/Mapper/Service 확장: includeHidden 옵션, updateVerification, findUnverified 등

frontend/src/app/admin/page.tsx

@@ -1470,12 +1470,12 @@ function VideosPanel({ isAdmin }: { isAdmin: boolean }) {
                               setEditRest({
                                 name: r.name,
                                 cuisine_type: r.cuisine_type || "",
-                                foods_mentioned: r.foods_mentioned.join(", "),
+                                foods_mentioned: (r.foods_mentioned || []).join(", "),
                                 evaluation: evalText,
                                 address: r.address || "",
                                 region: r.region || "",
                                 price_range: r.price_range || "",
-                                guests: r.guests.join(", "),
+                                guests: (r.guests || []).join(", "),
                               });
                             } : undefined}
                             title={isAdmin ? "클릭하여 수정" : undefined}
@@ -1513,7 +1513,7 @@ function VideosPanel({ isAdmin }: { isAdmin: boolean }) {
                               {r.cuisine_type && <p>종류: {r.cuisine_type}</p>}
                               {r.price_range && <p>가격대: {r.price_range}</p>}
                             </div>
-                            {r.foods_mentioned.length > 0 && (
+                            {r.foods_mentioned?.length > 0 && (
                               <div className="flex flex-wrap gap-1 mt-2">
                                 {r.foods_mentioned.map((f, j) => (
                                   <span key={j} className="px-1.5 py-0.5 bg-brand-50 text-brand-700 rounded text-xs">{f}</span>
@@ -1523,7 +1523,7 @@ function VideosPanel({ isAdmin }: { isAdmin: boolean }) {
                             {r.evaluation?.text && (
                               <p className="mt-1 text-xs text-gray-600">{r.evaluation.text}</p>
                             )}
-                            {r.guests.length > 0 && (
+                            {r.guests?.length > 0 && (
                               <p className="mt-1 text-xs text-gray-500">게스트: {r.guests.join(", ")}</p>
                             )}
                           </div>
@@ -1627,6 +1627,45 @@ function RestaurantsPanel({ isAdmin }: { isAdmin: boolean }) {
 
   useEffect(() => { load(); }, [load]);
 
+  // #322/#323 LLM 검증 UI
+  const [verifyPending, setVerifyPending] = useState<number | null>(null);
+  const [verifying, setVerifying] = useState(false);
+  const [verifyResult, setVerifyResult] = useState<string | null>(null);
+
+  const loadVerifyPending = useCallback(() => {
+    api.getVerifyPending().then((r) => setVerifyPending(r.pending)).catch(() => setVerifyPending(null));
+  }, []);
+  useEffect(() => { loadVerifyPending(); }, [loadVerifyPending]);
+
+  const handleVerifyAll = async () => {
+    if (!isAdmin) return;
+    if (!confirm(`미검증 식당 ${verifyPending ?? "?"}건을 LLM으로 일괄 검증합니다.\n잘못 등록된 데이터/프랜차이즈를 자동으로 숨김 처리합니다.\n진행할까요?`)) return;
+    setVerifying(true);
+    setVerifyResult(null);
+    try {
+      const r = await api.verifyAll(10);
+      setVerifyResult(`${r.processed}건 검증 완료`);
+      loadVerifyPending();
+      load();
+    } catch (e) {
+      setVerifyResult(`실패: ${e instanceof Error ? e.message : String(e)}`);
+    } finally {
+      setVerifying(false);
+    }
+  };
+
+  const handleToggleHidden = async (r: Restaurant) => {
+    if (!isAdmin) return;
+    const becomingHidden = !r.hidden;
+    const reason = becomingHidden ? (prompt("숨김 사유(선택)", "manual") ?? "manual") : "";
+    try {
+      await api.setRestaurantHidden(r.id, becomingHidden, reason || "manual");
+      load();
+    } catch (e) {
+      alert(`실패: ${e instanceof Error ? e.message : String(e)}`);
+    }
+  };
+
   const filtered = restaurants.filter((r) => {
     if (nameSearch && !r.name.toLowerCase().includes(nameSearch.toLowerCase())) return false;
     return true;
@@ -1728,6 +1767,18 @@ function RestaurantsPanel({ isAdmin }: { isAdmin: boolean }) {
           )}
         </div>
         {isAdmin && (<>
+          {/* #322/#323 — LLM 검증 */}
+          <div className="flex items-center gap-2 text-xs text-gray-600 dark:text-gray-400">
+            <span>미검증 {verifyPending ?? "?"}건</span>
+            <button
+              onClick={handleVerifyAll}
+              disabled={verifying || verifyPending === 0}
+              className="px-3 py-1 text-xs rounded bg-amber-500 hover:bg-amber-600 text-white disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {verifying ? "검증 중..." : "LLM 검증"}
+            </button>
+            {verifyResult && <span className="text-amber-600">{verifyResult}</span>}
+          </div>
           <button
             onClick={async () => {
               const pending = await fetch(`/api/restaurants/tabling-pending`, {
@@ -1890,6 +1941,7 @@ function RestaurantsPanel({ isAdmin }: { isAdmin: boolean }) {
               <th className="text-left px-4 py-3 cursor-pointer select-none hover:bg-gray-100" onClick={() => handleSort("price_range")}>가격대{sortIcon("price_range")}</th>
               <th className="text-center px-4 py-3 cursor-pointer select-none hover:bg-gray-100" onClick={() => handleSort("rating")}>평점{sortIcon("rating")}</th>
               <th className="text-center px-4 py-3 cursor-pointer select-none hover:bg-gray-100" onClick={() => handleSort("business_status")}>상태{sortIcon("business_status")}</th>
+              <th className="text-center px-4 py-3">검증</th>
             </tr>
           </thead>
           <tbody>
@@ -1917,11 +1969,34 @@ function RestaurantsPanel({ isAdmin }: { isAdmin: boolean }) {
                     <span className="text-xs text-gray-400">-</span>
                   )}
                 </td>
+                <td className="px-4 py-3 text-center" onClick={(e) => e.stopPropagation()}>
+                  {r.hidden ? (
+                    <button
+                      onClick={() => handleToggleHidden(r)}
+                      disabled={!isAdmin}
+                      title={r.hidden_reason || "manual"}
+                      className="px-1.5 py-0.5 bg-red-100 text-red-700 rounded text-[10px] font-semibold hover:bg-red-200 disabled:opacity-50"
+                    >
+                      숨김 {r.hidden_reason ? `(${r.hidden_reason.slice(0, 12)})` : ""}
+                    </button>
+                  ) : r.verified_at ? (
+                    <button
+                      onClick={() => handleToggleHidden(r)}
+                      disabled={!isAdmin}
+                      title="검증 통과 — 클릭하면 숨김"
+                      className="px-1.5 py-0.5 bg-green-100 text-green-700 rounded text-[10px] font-semibold hover:bg-green-200 disabled:opacity-50"
+                    >
+                      OK
+                    </button>
+                  ) : (
+                    <span className="text-xs text-gray-400">미검증</span>
+                  )}
+                </td>
               </tr>
             ))}
             {!loading && filtered.length === 0 && (
               <tr>
-                <td colSpan={6} className="px-4 py-8 text-center text-gray-400">
+                <td colSpan={7} className="px-4 py-8 text-center text-gray-400">
                   식당 데이터가 없습니다
                 </td>
               </tr>
@@ -2144,6 +2219,7 @@ interface AdminUser {
   email: string | null;
   nickname: string | null;
   avatar_url: string | null;
+  is_admin: boolean;
   provider: string | null;
   created_at: string | null;
   favorite_count: number;
@@ -2246,6 +2322,7 @@ function UsersPanel() {
             <tr>
               <th className="text-left px-4 py-2">사용자</th>
               <th className="text-left px-4 py-2">이메일</th>
+              <th className="text-center px-4 py-2">관리자</th>
               <th className="text-center px-4 py-2">찜</th>
               <th className="text-center px-4 py-2">리뷰</th>
               <th className="text-center px-4 py-2">메모</th>
@@ -2282,6 +2359,27 @@ function UsersPanel() {
                   </div>
                 </td>
                 <td className="px-4 py-2 text-gray-500">{u.email || "-"}</td>
+                <td className="px-4 py-2 text-center">
+                  <button
+                    onClick={async (e) => {
+                      e.stopPropagation();
+                      try {
+                        await api.updateAdminUserAdmin(u.id, !u.is_admin);
+                        setUsers((prev) => prev.map((x) => x.id === u.id ? { ...x, is_admin: !u.is_admin } : x));
+                      } catch (err) {
+                        console.error("Failed to update admin:", err);
+                        alert("관리자 권한 변경에 실패했습니다.");
+                      }
+                    }}
+                    className={`inline-block px-2 py-0.5 rounded-full text-xs font-medium transition-colors ${
+                      u.is_admin
+                        ? "bg-green-100 text-green-700 hover:bg-green-200"
+                        : "bg-gray-100 text-gray-400 hover:bg-gray-200"
+                    }`}
+                  >
+                    {u.is_admin ? "ON" : "OFF"}
+                  </button>
+                </td>
                 <td className="px-4 py-2 text-center">
                   {u.favorite_count > 0 ? (
                     <span className="inline-block px-2 py-0.5 bg-red-50 text-red-600 rounded-full text-xs font-medium">

frontend/src/lib/admin-utils.ts

@@ -0,0 +1,52 @@
+// #304 어드민 페이지 공통 유틸.
+// 결함: localStorage 직접 접근 10+곳 / SSE 파싱 코드 6곳 중복.
+
+const TOKEN_KEY = "tasteby_token";
+
+export function getAdminToken(): string | null {
+  if (typeof window === "undefined") return null;
+  return localStorage.getItem(TOKEN_KEY);
+}
+
+export function authHeaders(): Record<string, string> {
+  const token = getAdminToken();
+  return token ? { Authorization: `Bearer ${token}` } : {};
+}
+
+/**
+ * SSE(Server-Sent Events) 스트림을 라인 단위로 파싱하여 onEvent 콜백을 호출.
+ * 호환 패턴: `data: { ...json... }` 한 줄 = 한 이벤트.
+ * 비어있는 줄은 무시. JSON 파싱 실패 시 콜백 skip.
+ */
+export async function consumeSseStream(
+  response: Response,
+  onEvent: (event: unknown) => void,
+  onError?: (err: unknown) => void,
+): Promise<void> {
+  const reader = response.body?.getReader();
+  if (!reader) return;
+  const decoder = new TextDecoder();
+  let buffer = "";
+  try {
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      buffer += decoder.decode(value, { stream: true });
+      const lines = buffer.split("\n");
+      buffer = lines.pop() ?? "";
+      for (const line of lines) {
+        const trimmed = line.trim();
+        if (!trimmed.startsWith("data:")) continue;
+        const payload = trimmed.slice(5).trim();
+        if (!payload) continue;
+        try {
+          onEvent(JSON.parse(payload));
+        } catch {
+          // 무시: 일부 SSE 줄이 JSON이 아닐 수도 있음
+        }
+      }
+    }
+  } catch (err) {
+    onError?.(err);
+  }
+}

frontend/src/lib/api.ts

@@ -51,6 +51,10 @@ export interface Restaurant {
   website: string | null;
   channels?: string[];
   foods_mentioned?: string[];
+  // #322 LLM 검증
+  hidden?: boolean;
+  hidden_reason?: string | null;
+  verified_at?: string | null;
 }
 
 export interface VideoLink {
@@ -310,6 +314,7 @@ export const api = {
         email: string | null;
         nickname: string | null;
         avatar_url: string | null;
+        is_admin: boolean;
         provider: string | null;
         created_at: string | null;
         favorite_count: number;
@@ -320,6 +325,14 @@ export const api = {
     }>(`/api/admin/users${qs ? `?${qs}` : ""}`);
   },
 
+  updateAdminUserAdmin(userId: string, admin: boolean) {
+    return fetchApi<{ success: boolean }>(`/api/admin/users/${userId}/admin`, {
+      method: "PATCH",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ admin }),
+    });
+  },
+
   getAdminUserFavorites(userId: string) {
     return fetchApi<
       {
@@ -567,4 +580,30 @@ export const api = {
       { method: "POST" }
     );
   },
+
+  // #322 — LLM 검증 어드민 API
+  getVerifyPending() {
+    return fetchApi<{ pending: number }>("/api/admin/restaurants/verify/pending");
+  },
+  verifyAll(batchSize: number = 10) {
+    return fetchApi<{ processed: number }>(
+      `/api/admin/restaurants/verify/all?batchSize=${batchSize}`,
+      { method: "POST" }
+    );
+  },
+  verifyOne(id: string) {
+    return fetchApi<{ success: boolean; id: string }>(
+      `/api/admin/restaurants/${id}/verify`,
+      { method: "POST" }
+    );
+  },
+  setRestaurantHidden(id: string, hidden: boolean, reason: string = "manual") {
+    return fetchApi<{ success: boolean; id: string; hidden: boolean }>(
+      `/api/admin/restaurants/${id}/hidden`,
+      {
+        method: "PATCH",
+        body: JSON.stringify({ hidden, reason }),
+      }
+    );
+  },
 };