refactor(admin): #329 admin/page.tsx 분리 + localStorage 통일

- page.tsx 2817 LOC → 107 LOC (탭 라우팅 + CacheFlushButton만)
- _panels/ChannelsPanel.tsx (222), VideosPanel.tsx (1282),
  RestaurantsPanel.tsx (675), UsersPanel.tsx (383), DaemonPanel.tsx (231)
- localStorage.getItem("tasteby_token") 10곳 → getAdminToken() (lib/admin-utils)
- 패널 내부 로직/state 그대로 (점진적 접근, 회귀 위험 최소화)

후속 분리:
- (신규) SSE 파싱 6곳을 consumeSseStream으로 통일

설계서: docs/design/329-admin-split/README.md

Refs: #329 (Developer)

frontend/src/app/admin/_panels/DaemonPanel.tsx

@@ -0,0 +1,231 @@
+"use client";
+
+import { useCallback, useEffect, useState } from "react";
+import { api } from "@/lib/api";
+import type { DaemonConfig } from "@/lib/api";
+
+// #329 — admin/page.tsx에서 추출
+export function DaemonPanel({ isAdmin }: { isAdmin: boolean }) {
+  const [config, setConfig] = useState<DaemonConfig | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [running, setRunning] = useState<string | null>(null);
+  const [result, setResult] = useState<string | null>(null);
+
+  // Editable fields
+  const [scanEnabled, setScanEnabled] = useState(false);
+  const [scanInterval, setScanInterval] = useState(60);
+  const [processEnabled, setProcessEnabled] = useState(false);
+  const [processInterval, setProcessInterval] = useState(60);
+  const [processLimit, setProcessLimit] = useState(10);
+
+  const load = useCallback(() => {
+    setLoading(true);
+    api.getDaemonConfig().then((cfg) => {
+      setConfig(cfg);
+      setScanEnabled(cfg.scan_enabled);
+      setScanInterval(cfg.scan_interval_min);
+      setProcessEnabled(cfg.process_enabled);
+      setProcessInterval(cfg.process_interval_min);
+      setProcessLimit(cfg.process_limit);
+    }).catch(console.error).finally(() => setLoading(false));
+  }, []);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleSave = async () => {
+    setSaving(true);
+    setResult(null);
+    try {
+      await api.updateDaemonConfig({
+        scan_enabled: scanEnabled,
+        scan_interval_min: scanInterval,
+        process_enabled: processEnabled,
+        process_interval_min: processInterval,
+        process_limit: processLimit,
+      });
+      setResult("설정 저장 완료");
+      load();
+    } catch (e: unknown) {
+      setResult(e instanceof Error ? e.message : "저장 실패");
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const handleRunScan = async () => {
+    setRunning("scan");
+    setResult(null);
+    try {
+      const res = await api.runDaemonScan();
+      setResult(`채널 스캔 완료: 신규 ${res.new_videos}개 영상`);
+      load();
+    } catch (e: unknown) {
+      setResult(e instanceof Error ? e.message : "스캔 실패");
+    } finally {
+      setRunning(null);
+    }
+  };
+
+  const handleRunProcess = async () => {
+    setRunning("process");
+    setResult(null);
+    try {
+      const res = await api.runDaemonProcess(processLimit);
+      setResult(`영상 처리 완료: ${res.restaurants_extracted}개 식당 추출`);
+      load();
+    } catch (e: unknown) {
+      setResult(e instanceof Error ? e.message : "처리 실패");
+    } finally {
+      setRunning(null);
+    }
+  };
+
+  if (loading) return <p className="text-gray-500">로딩 중...</p>;
+
+  return (
+    <div className="space-y-6">
+      {/* Schedule Config */}
+      <div className="bg-surface rounded-lg shadow p-6">
+        <h2 className="text-lg font-semibold mb-4">스케줄 설정</h2>
+        <p className="text-xs text-gray-500 mb-4">
+          데몬이 실행 중일 때, 아래 설정에 따라 자동으로 채널 스캔 및 영상 처리를 수행합니다.
+        </p>
+
+        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+          {/* Scan config */}
+          <div className="border rounded-lg p-4 space-y-3">
+            <div className="flex items-center justify-between">
+              <h3 className="font-medium">채널 스캔</h3>
+              <label className="flex items-center gap-2 cursor-pointer">
+                <input
+                  type="checkbox"
+                  checked={scanEnabled}
+                  onChange={(e) => setScanEnabled(e.target.checked)}
+                  disabled={!isAdmin}
+                  className="w-4 h-4"
+                />
+                <span className={`text-sm ${scanEnabled ? "text-green-600 font-medium" : "text-gray-500"}`}>
+                  {scanEnabled ? "활성" : "비활성"}
+                </span>
+              </label>
+            </div>
+            <div>
+              <label className="block text-xs text-gray-500 mb-1">주기 (분)</label>
+              <input
+                type="number"
+                value={scanInterval}
+                onChange={(e) => setScanInterval(Number(e.target.value))}
+                disabled={!isAdmin}
+                min={1}
+                className="border rounded px-3 py-1.5 text-sm w-32"
+              />
+            </div>
+            {config?.last_scan_at && (
+              <p className="text-xs text-gray-400">마지막 스캔: {config.last_scan_at}</p>
+            )}
+          </div>
+
+          {/* Process config */}
+          <div className="border rounded-lg p-4 space-y-3">
+            <div className="flex items-center justify-between">
+              <h3 className="font-medium">영상 처리</h3>
+              <label className="flex items-center gap-2 cursor-pointer">
+                <input
+                  type="checkbox"
+                  checked={processEnabled}
+                  onChange={(e) => setProcessEnabled(e.target.checked)}
+                  disabled={!isAdmin}
+                  className="w-4 h-4"
+                />
+                <span className={`text-sm ${processEnabled ? "text-green-600 font-medium" : "text-gray-500"}`}>
+                  {processEnabled ? "활성" : "비활성"}
+                </span>
+              </label>
+            </div>
+            <div className="flex gap-4">
+              <div>
+                <label className="block text-xs text-gray-500 mb-1">주기 (분)</label>
+                <input
+                  type="number"
+                  value={processInterval}
+                  onChange={(e) => setProcessInterval(Number(e.target.value))}
+                  disabled={!isAdmin}
+                  min={1}
+                  className="border rounded px-3 py-1.5 text-sm w-32"
+                />
+              </div>
+              <div>
+                <label className="block text-xs text-gray-500 mb-1">처리 건수</label>
+                <input
+                  type="number"
+                  value={processLimit}
+                  onChange={(e) => setProcessLimit(Number(e.target.value))}
+                  disabled={!isAdmin}
+                  min={1}
+                  max={50}
+                  className="border rounded px-3 py-1.5 text-sm w-32"
+                />
+              </div>
+            </div>
+            {config?.last_process_at && (
+              <p className="text-xs text-gray-400">마지막 처리: {config.last_process_at}</p>
+            )}
+          </div>
+        </div>
+
+        {isAdmin && (
+          <div className="mt-4">
+            <button
+              onClick={handleSave}
+              disabled={saving}
+              className="px-4 py-2 bg-brand-600 text-white text-sm rounded hover:bg-brand-700 disabled:opacity-50"
+            >
+              {saving ? "저장 중..." : "설정 저장"}
+            </button>
+          </div>
+        )}
+      </div>
+
+      {/* Manual Triggers */}
+      <div className="bg-surface rounded-lg shadow p-6">
+        <h2 className="text-lg font-semibold mb-4">수동 실행</h2>
+        <p className="text-xs text-gray-500 mb-4">
+          스케줄과 관계없이 즉시 실행합니다. 처리 시간이 걸릴 수 있습니다.
+        </p>
+
+        <div className="flex gap-3">
+          {isAdmin && (
+            <>
+              <button
+                onClick={handleRunScan}
+                disabled={running !== null}
+                className="px-4 py-2 bg-green-600 text-white text-sm rounded hover:bg-green-700 disabled:opacity-50"
+              >
+                {running === "scan" ? "스캔 중..." : "채널 스캔 실행"}
+              </button>
+              <button
+                onClick={handleRunProcess}
+                disabled={running !== null}
+                className="px-4 py-2 bg-purple-600 text-white text-sm rounded hover:bg-purple-700 disabled:opacity-50"
+              >
+                {running === "process" ? "처리 중..." : "영상 처리 실행"}
+              </button>
+            </>
+          )}
+        </div>
+
+        {result && (
+          <p className={`mt-3 text-sm ${result.includes("실패") || result.includes("API") ? "text-red-600" : "text-green-600"}`}>
+            {result}
+          </p>
+        )}
+      </div>
+
+      {/* Config updated_at */}
+      {config?.updated_at && (
+        <p className="text-xs text-gray-400 text-right">설정 수정일: {config.updated_at}</p>
+      )}
+    </div>
+  );
+}