feat: refine AI navigation and accessibility recovery

frontend/lib/features/stats/stats_page.dart

@@ -3,9 +3,12 @@ import 'dart:async';
 import 'package:miaoji_zhang/shared/services/shanghai_time.dart';
 
 import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
 import 'package:miaoji_zhang/shared/api/api_client.dart';
 import 'package:miaoji_zhang/shared/api/business_api.dart';
+import 'package:miaoji_zhang/shared/api/config_api.dart';
 import 'package:miaoji_zhang/shared/services/current_ledger_store.dart';
+import 'package:miaoji_zhang/shared/services/session_store.dart';
 import 'package:miaoji_zhang/shared/theme/app_theme.dart';
 import 'package:miaoji_zhang/shared/widgets/app_controls.dart';
 import 'package:miaoji_zhang/shared/widgets/async_error_view.dart';
@@ -161,8 +164,7 @@ class _StatsPageState extends State<StatsPage> {
                           else ...[
                             _categoryCard(stats),
                             SizedBox(height: 10),
-                            if (stats.analysis case final analysis?)
-                              _analysisCard(analysis),
+                            _reportCard(stats.analysis),
                             SizedBox(height: 10),
                             _trendCard(stats),
                             if (stats.byCategory.isNotEmpty) ...[
@@ -318,41 +320,103 @@ class _StatsPageState extends State<StatsPage> {
     );
   }
 
-  Widget _analysisCard(String text) {
-    return Container(
-      padding: const EdgeInsets.all(14),
-      decoration: BoxDecoration(
-        color: context.jz.aiBackground,
+  Widget _reportCard(String? analysis) {
+    final aiEnabled = SessionStore.instance.aiEnabled;
+    final accent = aiEnabled ? AppTheme.ai : AppTheme.primary;
+    final background = aiEnabled
+        ? context.jz.aiBackground
+        : context.jz.primaryBackground;
+    final copy = analysis?.trim().isNotEmpty == true
+        ? analysis!.trim()
+        : '查看本周期的收支变化、分类排行和消费高峰。';
+    final route = Uri(
+      path: '/report',
+      queryParameters: {'period': _period, 'date': _anchor.toIso8601String()},
+    ).toString();
+    return Semantics(
+      button: true,
+      label: aiEnabled ? '查看 AI 报告' : '查看周期报告',
+      child: Material(
+        color: background,
         borderRadius: BorderRadius.circular(14),
-        border: Border.all(color: AppTheme.ai.withValues(alpha: 0.12)),
-      ),
-      child: Row(
-        children: [
-          Container(
-            width: 30,
-            height: 30,
+        child: InkWell(
+          onTap: () => context.push(route),
+          borderRadius: BorderRadius.circular(14),
+          child: Container(
+            padding: const EdgeInsets.all(14),
             decoration: BoxDecoration(
-              color: context.jz.card,
-              borderRadius: BorderRadius.circular(10),
+              borderRadius: BorderRadius.circular(14),
+              border: Border.all(color: accent.withValues(alpha: 0.12)),
             ),
-            child: Icon(
-              Icons.auto_awesome_rounded,
-              size: 16,
-              color: AppTheme.ai,
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Container(
+                  width: 32,
+                  height: 32,
+                  decoration: BoxDecoration(
+                    color: context.jz.card,
+                    borderRadius: BorderRadius.circular(10),
+                  ),
+                  child: Icon(
+                    aiEnabled
+                        ? Icons.auto_awesome_rounded
+                        : Icons.assessment_outlined,
+                    size: 17,
+                    color: accent,
+                  ),
+                ),
+                SizedBox(width: 10),
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(
+                        aiEnabled
+                            ? '${PublicConfigApi.companionName}的 AI 报告'
+                            : '周期报告',
+                        style: TextStyle(
+                          fontSize: 12.5,
+                          fontWeight: FontWeight.w700,
+                          color: accent,
+                        ),
+                      ),
+                      SizedBox(height: 5),
+                      Text(
+                        copy,
+                        style: TextStyle(
+                          fontSize: 12,
+                          color: context.jz.text2,
+                          height: 1.5,
+                        ),
+                      ),
+                      SizedBox(height: 8),
+                      Row(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          Text(
+                            '查看完整报告',
+                            style: TextStyle(
+                              fontSize: 11.5,
+                              fontWeight: FontWeight.w700,
+                              color: accent,
+                            ),
+                          ),
+                          SizedBox(width: 2),
+                          Icon(
+                            Icons.chevron_right_rounded,
+                            size: 17,
+                            color: accent,
+                          ),
+                        ],
+                      ),
+                    ],
+                  ),
+                ),
+              ],
             ),
           ),
-          SizedBox(width: 10),
-          Expanded(
-            child: Text(
-              text,
-              style: TextStyle(
-                fontSize: 12,
-                color: context.jz.text2,
-                height: 1.5,
-              ),
-            ),
-          ),
-        ],
+        ),
       ),
     );
   }