Add transfer tracking and secure admin access

frontend/lib/features/home/pages/search_page.dart

@@ -22,6 +22,7 @@ class _SearchPageState extends State<SearchPage> {
   bool _loading = false;
   String? _error;
   String? _timeFilter; // today | week | month
+  String? _typeFilter;
   double? _minAmount, _maxAmount;
 
   Future<void> _search() async {
@@ -29,6 +30,7 @@ class _SearchPageState extends State<SearchPage> {
     if (q.isEmpty &&
         !_aiOnly &&
         _timeFilter == null &&
+        _typeFilter == null &&
         _minAmount == null &&
         _maxAmount == null)
       return;
@@ -58,6 +60,7 @@ class _SearchPageState extends State<SearchPage> {
         maxAmount: _maxAmount,
         from: from,
         to: to,
+        type: _typeFilter,
       );
       if (mounted)
         setState(() {
@@ -74,7 +77,7 @@ class _SearchPageState extends State<SearchPage> {
   @override
   Widget build(BuildContext context) {
     final total = _results
-        .where((t) => !t.isIncome)
+        .where((t) => t.isExpense)
         .fold<double>(0, (s, t) => s + t.amount);
     return Scaffold(
       appBar: AppBar(
@@ -84,7 +87,7 @@ class _SearchPageState extends State<SearchPage> {
           textInputAction: TextInputAction.search,
           onSubmitted: (_) => _search(),
           decoration: InputDecoration(
-            hintText: '搜备注 / 分类 / 你说过的话',
+            hintText: '搜备注 / 对方 / 分类 / 原话',
             contentPadding: EdgeInsets.symmetric(horizontal: 14, vertical: 8),
           ),
         ),
@@ -122,6 +125,20 @@ class _SearchPageState extends State<SearchPage> {
                     },
                   ),
                 ),
+                for (final option in const [
+                  ('expense', '支出'),
+                  ('transfer', '转账'),
+                  ('income', '收入'),
+                ])
+                  FilterChip(
+                    label: Text(option.$2, style: TextStyle(fontSize: 11)),
+                    selected: _typeFilter == option.$1,
+                    selectedColor: context.jz.primaryBackground,
+                    onSelected: (selected) {
+                      setState(() => _typeFilter = selected ? option.$1 : null);
+                      _search();
+                    },
+                  ),
                 if (_searched && !_loading)
                   Padding(
                     padding: const EdgeInsets.symmetric(horizontal: 6),