feat(agent-office): useActivityFeed 훅 (페이지네이션·필터·refresh)

src/pages/agent-office/hooks/useActivityFeed.js

@@ -0,0 +1,57 @@
+// src/pages/agent-office/hooks/useActivityFeed.js
+import { useState, useEffect, useCallback, useRef } from 'react';
+import { agentActivity } from '../../../api';
+
+const PAGE_SIZE = 30;
+
+export function useActivityFeed(filters, refreshTrigger = 0) {
+  const [items, setItems] = useState([]);
+  const [total, setTotal] = useState(0);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState(null);
+
+  const offsetRef = useRef(0);
+  const loadingRef = useRef(false);
+  const filtersRef = useRef(filters);
+  filtersRef.current = filters;
+
+  const filterKey = JSON.stringify(filters);
+
+  const fetchPage = useCallback(async (offset, replace) => {
+    if (loadingRef.current) return;
+    loadingRef.current = true;
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await agentActivity({ ...filtersRef.current, limit: PAGE_SIZE, offset });
+      const newItems = Array.isArray(data?.items) ? data.items : [];
+      setTotal(data?.total || 0);
+      setItems(prev => (replace ? newItems : [...prev, ...newItems]));
+      offsetRef.current = offset + newItems.length;
+    } catch (e) {
+      setError(e.message || '불러오기 실패');
+    } finally {
+      loadingRef.current = false;
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    offsetRef.current = 0;
+    fetchPage(0, true);
+  }, [filterKey, refreshTrigger, fetchPage]);
+
+  const loadMore = useCallback(() => {
+    if (loadingRef.current) return;
+    if (offsetRef.current >= total) return;
+    fetchPage(offsetRef.current, false);
+  }, [fetchPage, total]);
+
+  const retry = useCallback(() => {
+    offsetRef.current = 0;
+    fetchPage(0, true);
+  }, [fetchPage]);
+
+  const hasMore = items.length < total;
+  return { items, total, loading, error, hasMore, loadMore, retry };
+}