refactor: 抽取 SearchSelect 为公共组件

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/SearchSelect.tsx

@@ -0,0 +1,71 @@
+import { useState, useEffect, useMemo, useRef } from 'react';
+import { ChevronDown } from 'lucide-react';
+
+export function SearchSelect({ 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 displayValue = value || '';
+
+  return (
+    <div ref={ref} className="relative">
+      <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-blue-500/20 focus-within:border-blue-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={displayValue || placeholder}
+          value={open ? query : displayValue}
+          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">
+          <div
+            className="px-2 py-1.5 text-xs text-gray-400 cursor-pointer hover:bg-gray-50"
+            onClick={() => { onChange(''); setQuery(''); setOpen(false); }}
+          >
+            {placeholder}
+          </div>
+          {filtered.map((o) => (
+            <div
+              key={o}
+              className={`px-2 py-1.5 text-xs cursor-pointer hover:bg-blue-50 transition-colors ${o === value ? 'bg-blue-50 text-blue-600 font-bold' : 'text-gray-700'}`}
+              onClick={() => { onChange(o); setQuery(''); setOpen(false); }}
+            >
+              {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>
+  );
+}