feat: refine AI navigation and accessibility recovery

frontend/lib/features/stats/report_page.dart

@@ -16,7 +16,10 @@ import 'package:miaoji_zhang/shared/services/session_store.dart';
 enum _ReportKind { weekly, monthly, yearly }
 
 class ReportPage extends StatefulWidget {
-  const ReportPage({super.key});
+  final String? initialPeriod;
+  final DateTime? initialAnchor;
+
+  const ReportPage({super.key, this.initialPeriod, this.initialAnchor});
 
   @override
   State<ReportPage> createState() => _ReportPageState();
@@ -33,6 +36,12 @@ class _ReportPageState extends State<ReportPage> {
   @override
   void initState() {
     super.initState();
+    _anchor = widget.initialAnchor ?? ShanghaiTime.now;
+    _kind = switch (widget.initialPeriod) {
+      'week' => _ReportKind.weekly,
+      'year' => _ReportKind.yearly,
+      _ => _ReportKind.monthly,
+    };
     PublicConfigApi.companionNotifier.addListener(_refreshCompanion);
     CurrentLedgerStore.instance.addListener(_load);
     unawaited(_load());