feat: 实时监控改为瀑布流无限滚动+回到顶部

- 移除分页按钮，改为滚动触底自动加载下一页
- 滚动超过600px时显示蓝色回到顶部按钮
- 底部提示加载状态（加载中.../已加载全部 N 条）
- 筛选/排序变化时自动重置为首页

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/mileage/MonitoringView.tsx

@@ -1,9 +1,9 @@
-import { useState, useEffect, useCallback, useMemo } from 'react';
+import { useState, useEffect, useCallback, useMemo, useRef } from 'react';
 import { motion, AnimatePresence } from 'motion/react';
 import {
   Truck, Search, Filter, ChevronDown,
   Maximize2, Minimize2, RotateCcw,
-  ArrowUp, ArrowDown, ChevronLeft, ChevronRight,
+  ArrowUp, ArrowDown, ChevronsUp,
 } from 'lucide-react';
 import type { MonitoringVehicle, MonitoringStats, MonitoringFilters } from './types';
 import { fetchMonitoring } from './api';
@@ -111,20 +111,24 @@ export default function MonitoringView() {
   const [filterOptions, setFilterOptions] = useState<MonitoringFilters>({ departments: [], customers: [], plates: [] });
   const [total, setTotal] = useState(0);
   const [page, setPage] = useState(1);
-  const [totalPages, setTotalPages] = useState(1);
+  const [hasMore, setHasMore] = useState(true);
-  const [updatedAt, setUpdatedAt] = useState('');
+  const [loadingMore, setLoadingMore] = useState(false);
+  const [showBackToTop, setShowBackToTop] = useState(false);
   const PAGE_SIZE = 50;
+  const listEndRef = useRef<HTMLDivElement>(null);
+  const scrollContainerRef = useRef<HTMLDivElement>(null);
 
   const departments = filterOptions.departments;
   const plateNumbers = filterOptions.plates;
   const projects = filterOptions.customers;
 
-  const loadData = useCallback((p = page) => {
+  // 加载首页数据
+  const loadFirstPage = useCallback(() => {
     fetchMonitoring({
       sortBy,
       sortOrder,
       limit: PAGE_SIZE,
-      page: p,
+      page: 1,
       search: searchTerm || undefined,
       dept: filterDept !== 'All' ? filterDept : undefined,
       customer: filterProject !== 'All' ? filterProject : undefined,
@@ -133,22 +137,54 @@ export default function MonitoringView() {
       setStats(d.stats);
       setFilterOptions(d.filters);
       setTotal(d.total);
-      setPage(d.page);
+      setPage(1);
-      setTotalPages(d.totalPages);
+      setHasMore(d.page < d.totalPages);
-      setUpdatedAt(d.updatedAt);
     }).catch(() => {});
-  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, page]);
-
-  // 筛选/排序变化时重置到第1页
-  useEffect(() => {
-    setPage(1);
-    loadData(1);
   }, [sortBy, sortOrder, searchTerm, filterDept, filterProject]);
 
-  // 翻页时加载
+  // 加载更多
+  const loadMore = useCallback(() => {
+    if (loadingMore || !hasMore) return;
+    const nextPage = page + 1;
+    setLoadingMore(true);
+    fetchMonitoring({
+      sortBy,
+      sortOrder,
+      limit: PAGE_SIZE,
+      page: nextPage,
+      search: searchTerm || undefined,
+      dept: filterDept !== 'All' ? filterDept : undefined,
+      customer: filterProject !== 'All' ? filterProject : undefined,
+    }).then(d => {
+      setVehicles(prev => [...prev, ...d.vehicles]);
+      setPage(nextPage);
+      setHasMore(nextPage < d.totalPages);
+    }).catch(() => {}).finally(() => setLoadingMore(false));
+  }, [sortBy, sortOrder, searchTerm, filterDept, filterProject, page, loadingMore, hasMore]);
+
+  // 筛选/排序变化时重新加载
   useEffect(() => {
-    loadData(page);
+    loadFirstPage();
-  }, [page]);
+  }, [loadFirstPage]);
+
+  // 滚动触底检测 + 回到顶部按钮
+  useEffect(() => {
+    const handleScroll = () => {
+      const scrollY = window.scrollY;
+      setShowBackToTop(scrollY > 600);
+      const scrollHeight = document.documentElement.scrollHeight;
+      const clientHeight = window.innerHeight;
+      if (scrollHeight - scrollY - clientHeight < 200) {
+        loadMore();
+      }
+    };
+    window.addEventListener('scroll', handleScroll, { passive: true });
+    return () => window.removeEventListener('scroll', handleScroll);
+  }, [loadMore]);
+
+  const scrollToTop = () => {
+    window.scrollTo({ top: 0, behavior: 'smooth' });
+  };
 
   const filteredVehicles = vehicles;
 
@@ -706,11 +742,11 @@ export default function MonitoringView() {
       <div className="space-y-1.5">
         <div className="flex items-center justify-between px-2 mb-1">
           <span className="text-[9px] font-black text-slate-400 uppercase tracking-widest">车辆详情清单</span>
-          <span className="text-[9px] font-bold text-slate-300">{filteredVehicles.length} 条</span>
+          <span className="text-[9px] font-bold text-slate-300">{total} 条</span>
         </div>
 
         <div className="grid grid-cols-1 gap-1.5">
-          {filteredVehicles.slice(0, 60).map((v) => (
+          {filteredVehicles.map((v) => (
             <motion.div
               initial={{ opacity: 0 }}
               animate={{ opacity: 1 }}
@@ -762,35 +798,40 @@ export default function MonitoringView() {
           ))}
         </div>
 
-        {filteredVehicles.length === 0 && (
+        {filteredVehicles.length === 0 && !loadingMore && (
           <div className="py-10 text-center bg-white rounded-2xl border border-dashed border-slate-100">
             <p className="text-xs font-bold text-slate-300">未找到匹配数据</p>
           </div>
         )}
 
-        {/* 分页控件 */}
+        {/* 加载更多提示 */}
-        {totalPages > 1 && (
+        {loadingMore && (
-          <div className="flex items-center justify-center gap-3 py-3">
+          <div className="py-4 text-center">
-            <button
+            <span className="text-[10px] font-bold text-slate-400">加载中...</span>
-              onClick={() => setPage(Math.max(1, page - 1))}
-              disabled={page <= 1}
-              className="p-1.5 rounded-lg bg-white border border-slate-100 shadow-sm disabled:opacity-30 disabled:cursor-not-allowed hover:bg-slate-50 transition-colors"
-            >
-              <ChevronLeft size={14} className="text-slate-600" />
-            </button>
-            <span className="text-[10px] font-bold text-slate-400">
-              {page} / {totalPages}
-            </span>
-            <button
-              onClick={() => setPage(Math.min(totalPages, page + 1))}
-              disabled={page >= totalPages}
-              className="p-1.5 rounded-lg bg-white border border-slate-100 shadow-sm disabled:opacity-30 disabled:cursor-not-allowed hover:bg-slate-50 transition-colors"
-            >
-              <ChevronRight size={14} className="text-slate-600" />
-            </button>
           </div>
         )}
+        {!hasMore && filteredVehicles.length > 0 && (
+          <div className="py-4 text-center">
+            <span className="text-[10px] font-bold text-slate-300">已加载全部 {total} 条</span>
+          </div>
+        )}
+        <div ref={listEndRef} />
       </div>
+
+      {/* 回到顶部按钮 */}
+      <AnimatePresence>
+        {showBackToTop && (
+          <motion.button
+            initial={{ opacity: 0, scale: 0.8 }}
+            animate={{ opacity: 1, scale: 1 }}
+            exit={{ opacity: 0, scale: 0.8 }}
+            onClick={scrollToTop}
+            className="fixed bottom-20 right-4 md:bottom-6 md:right-6 z-40 w-10 h-10 bg-blue-600 text-white rounded-full shadow-lg shadow-blue-200 flex items-center justify-center active:scale-95 transition-transform"
+          >
+            <ChevronsUp size={18} />
+          </motion.button>
+        )}
+      </AnimatePresence>
     </>
   );
 }