feat: 客户多选筛选、统计报表里程与监控看板数据一致

- 资产管理按客户筛选改为多选（支持同时选多个客户）
- 新增 MultiSearchSelect 组件（搜索+标签+复选框）
- 统计报表 todayTotal 改用监控缓存数据，与里程看板一致

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

src/components/MultiSearchSelect.tsx

@@ -0,0 +1,88 @@
+import { useState, useEffect, useMemo, useRef } from 'react';
+import { ChevronDown } from 'lucide-react';
+
+export function MultiSearchSelect({ value, onChange, options, placeholder, className }: {
+  value: string[];
+  onChange: (v: string[]) => void;
+  options: string[];
+  placeholder: string;
+  className?: string;
+}) {
+  const [open, setOpen] = useState(false);
+  const [query, setQuery] = useState('');
+  const ref = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    const handler = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false);
+    };
+    document.addEventListener('mousedown', handler);
+    return () => document.removeEventListener('mousedown', handler);
+  }, []);
+
+  const filtered = useMemo(() => {
+    if (!query) return options;
+    const q = query.toLowerCase();
+    return options.filter((o) => o.toLowerCase().includes(q));
+  }, [options, query]);
+
+  const toggle = (name: string) => {
+    onChange(value.includes(name) ? value.filter(c => c !== name) : [...value, name]);
+  };
+
+  return (
+    <div ref={ref} className="relative">
+      {value.length > 0 && (
+        <div className="flex flex-wrap gap-1 mb-1.5">
+          {value.map(c => (
+            <span key={c} className="inline-flex items-center gap-0.5 px-1.5 py-0.5 bg-emerald-100 text-emerald-700 rounded text-[10px] font-medium">
+              {c}
+              <button onClick={() => toggle(c)} className="hover:text-red-500 ml-0.5 leading-none">&times;</button>
+            </span>
+          ))}
+        </div>
+      )}
+      <div
+        className={`flex items-center bg-white border border-gray-200 rounded-lg shadow-sm cursor-pointer transition-all focus-within:ring-2 focus-within:ring-emerald-500/20 focus-within:border-emerald-500 ${className || 'text-xs py-1.5 px-2'}`}
+        onClick={() => setOpen(!open)}
+      >
+        <input
+          type="text"
+          className="flex-1 outline-none bg-transparent min-w-0 text-inherit"
+          placeholder={value.length > 0 ? `已选 ${value.length} 个客户` : placeholder}
+          value={open ? query : ''}
+          onChange={(e) => { setQuery(e.target.value); if (!open) setOpen(true); }}
+          onFocus={() => { setOpen(true); setQuery(''); }}
+        />
+        <ChevronDown size={14} className={`text-gray-400 shrink-0 transition-transform ${open ? 'rotate-180' : ''}`} />
+      </div>
+      {open && (
+        <div className="absolute z-50 left-0 right-0 mt-1 bg-white border border-gray-200 rounded-lg shadow-xl max-h-48 overflow-auto">
+          {value.length > 0 && (
+            <div
+              className="px-2 py-1.5 text-xs text-gray-400 cursor-pointer hover:bg-gray-50 border-b border-gray-100"
+              onClick={() => onChange([])}
+            >
+              清除全部已选
+            </div>
+          )}
+          {filtered.map(o => (
+            <div
+              key={o}
+              className={`px-2 py-1.5 text-xs cursor-pointer hover:bg-emerald-50 transition-colors flex items-center gap-1.5 ${value.includes(o) ? 'bg-emerald-50 text-emerald-700 font-medium' : 'text-gray-700'}`}
+              onClick={() => toggle(o)}
+            >
+              <span className={`w-3.5 h-3.5 rounded border flex items-center justify-center shrink-0 ${value.includes(o) ? 'bg-emerald-500 border-emerald-500 text-white' : 'border-gray-300'}`}>
+                {value.includes(o) && <span className="text-[9px]">&#10003;</span>}
+              </span>
+              {o}
+            </div>
+          ))}
+          {filtered.length === 0 && (
+            <div className="px-2 py-3 text-xs text-gray-400 text-center">无匹配项</div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}