Add search history with AutoComplete dropdown

- Show last 10 search records on input focus with clock icon
- Filter history as user types
- Click history item to search directly
- Deduplicate and persist to localStorage

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

src/app/page.tsx

@@ -12,8 +12,9 @@ import {
   Empty,
   Modal,
   Checkbox,
+  AutoComplete,
 } from "antd";
-import { SearchOutlined, SettingOutlined, HolderOutlined } from "@ant-design/icons";
+import { SearchOutlined, SettingOutlined, HolderOutlined, ClockCircleOutlined } from "@ant-design/icons";
 import type { ColumnsType } from "antd/es/table";
 import {
   DndContext,
@@ -300,6 +301,29 @@ function ColumnSettingsModal({
   );
 }
 
+/* ─── Search History ─── */
+
+const HISTORY_KEY = "web-table-search-history";
+const MAX_HISTORY = 10;
+
+function loadHistory(): string[] {
+  try {
+    const saved = localStorage.getItem(HISTORY_KEY);
+    return saved ? JSON.parse(saved) : [];
+  } catch {
+    return [];
+  }
+}
+
+function saveHistoryToStorage(history: string[]) {
+  localStorage.setItem(HISTORY_KEY, JSON.stringify(history));
+}
+
+function addToHistory(value: string, history: string[]): string[] {
+  const filtered = history.filter((h) => h !== value);
+  return [value, ...filtered].slice(0, MAX_HISTORY);
+}
+
 /* ─── Search Bar (isolated) ─── */
 
 function SearchBar({
@@ -313,17 +337,47 @@ function SearchBar({
   loading: boolean;
   resultCount: number;
   searched: boolean;
-  onSearch: (workshopNo: string) => void;
+  onSearch: (workshopNo: string) => Promise<void>;
   onClear: () => void;
   onOpenColumnSettings: () => void;
 }) {
   const [inputValue, setInputValue] = useState("");
+  const [history, setHistory] = useState<string[]>(() => loadHistory());
+  const [open, setOpen] = useState(false);
+
+  const filteredHistory = inputValue
+    ? history.filter((h) => h.toLowerCase().includes(inputValue.toLowerCase()))
+    : history;
+
+  const options = filteredHistory.map((h) => ({
+    value: h,
+    label: (
+      <span style={{ display: "flex", alignItems: "center", gap: 8 }}>
+        <ClockCircleOutlined style={{ color: "#bbb" }} />
+        {h}
+      </span>
+    ),
+  }));
 
   const handleSearch = useCallback(() => {
-    if (inputValue.trim()) {
-      onSearch(inputValue.trim());
-    }
-  }, [inputValue, onSearch]);
+    const val = inputValue.trim();
+    if (!val) return;
+    const updated = addToHistory(val, history);
+    setHistory(updated);
+    saveHistoryToStorage(updated);
+    onSearch(val);
+  }, [inputValue, history, onSearch]);
+
+  const handleSelect = useCallback(
+    (val: string) => {
+      setInputValue(val);
+      const updated = addToHistory(val, history);
+      setHistory(updated);
+      saveHistoryToStorage(updated);
+      onSearch(val);
+    },
+    [history, onSearch]
+  );
 
   return (
     <div
@@ -339,15 +393,23 @@ function SearchBar({
       </Title>
       <Space>
         <Space.Compact>
+          <AutoComplete
+            open={open && filteredHistory.length > 0}
+            options={options}
+            value={inputValue}
+            onChange={(val) => setInputValue(val)}
+            onSelect={handleSelect}
+            onFocus={() => setOpen(true)}
+            onBlur={() => setOpen(false)}
+            style={{ width: 320 }}
+          >
             <Input
               prefix={<SearchOutlined />}
               placeholder="请输入车间号，如 R05697"
-            value={inputValue}
-            onChange={(e) => setInputValue(e.target.value)}
               onPressEnter={handleSearch}
               allowClear
-            style={{ width: 320 }}
             />
+          </AutoComplete>
           <Button type="primary" onClick={handleSearch} loading={loading}>
             查询
           </Button>