feat: 添加业务分析后端接口

新增 AnalysisController 提供 6 个分析接口：
- /admin/analysis/profit - 盈利分析（交易手续费/充提手续费/资金利差）
- /admin/analysis/cash-flow - 资金流动趋势（按月统计充值/提现/净流入）
- /admin/analysis/trade - 交易分析（买入/卖出统计+趋势）
- /admin/analysis/coin-distribution - 币种交易分布
- /admin/analysis/user-growth - 用户增长分析（新增/活跃用户）
- /admin/analysis/risk - 风险指标（大额交易/异常提现/KYC/冻结账户）
- /admin/analysis/health - 综合健康度评分

更新 Mapper 添加分析查询方法：
- OrderFundMapper: 手续费统计、时间范围查询、大额交易、异常提现
- OrderTradeMapper: 交易金额统计、活跃用户、币种分布

前端 API 对接：
- 新增 6 个分析相关 Query hooks
- 更新 analytics.vue 使用真实数据
- 动态决策建议基于实际数据

flutter_monisuo/lib/ui/pages/main/main_page.dart

@@ -1,12 +1,12 @@
 import 'package:flutter/material.dart';
-import '../../../core/constants/app_colors.dart';
+import 'package:shadcn_ui/shadcn_ui.dart';
 import '../home/home_page.dart';
 import '../market/market_page.dart';
 import '../trade/trade_page.dart';
 import '../asset/asset_page.dart';
 import '../mine/mine_page.dart';
 
-/// 主页面（包含底部导航）
+/// 主页面（使用 shadcn_ui 风格）
 class MainPage extends StatefulWidget {
   const MainPage({super.key});
 
@@ -26,66 +26,71 @@ class _MainPageState extends State<MainPage> {
   ];
 
   final List<_TabItem> _tabs = [
-    _TabItem('首页', Icons.home_outlined, Icons.home),
-    _TabItem('行情', Icons.show_chart_outlined, Icons.show_chart),
-    _TabItem('交易', Icons.swap_horiz_outlined, Icons.swap_horiz),
-    _TabItem('资产', Icons.account_balance_wallet_outlined, Icons.account_balance_wallet),
-    _TabItem('我的', Icons.person_outline, Icons.person),
+    _TabItem('首页', LucideIcons.house, LucideIcons.house),
+    _TabItem('行情', LucideIcons.trendingUp, LucideIcons.trendingUp),
+    _TabItem('交易', LucideIcons.arrowLeftRight, LucideIcons.arrowLeftRight),
+    _TabItem('资产', LucideIcons.wallet, LucideIcons.wallet),
+    _TabItem('我的', LucideIcons.user, LucideIcons.user),
   ];
 
   @override
   Widget build(BuildContext context) {
+    final theme = ShadTheme.of(context);
+
     return Scaffold(
       body: IndexedStack(
         index: _currentIndex,
         children: _pages,
       ),
-      bottomNavigationBar: _buildBottomNav(),
-    );
-  }
+      bottomNavigationBar: Container(
+        decoration: BoxDecoration(
+          color: theme.colorScheme.background,
+          border: Border(
+            top: BorderSide(color: theme.colorScheme.border),
+          ),
+        ),
+        child: SafeArea(
+          child: Padding(
+            padding: const EdgeInsets.symmetric(vertical: 8),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.spaceAround,
+              children: _tabs.asMap().entries.map((entry) {
+                final index = entry.key;
+                final tab = entry.value;
+                final isSelected = index == _currentIndex;
 
-  Widget _buildBottomNav() {
-    return Container(
-      decoration: const BoxDecoration(
-        color: AppColors.cardBackground,
-        border: Border(top: BorderSide(color: AppColors.border)),
-      ),
-      child: SafeArea(
-        child: Padding(
-          padding: const EdgeInsets.symmetric(vertical: 8),
-          child: Row(
-            mainAxisAlignment: MainAxisAlignment.spaceAround,
-            children: _tabs.asMap().entries.map((entry) {
-              final index = entry.key;
-              final tab = entry.value;
-              final isSelected = index == _currentIndex;
-
-              return GestureDetector(
-                onTap: () => setState(() => _currentIndex = index),
-                behavior: HitTestBehavior.opaque,
-                child: Container(
-                  padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
-                  child: Column(
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      Icon(
-                        isSelected ? tab.selectedIcon : tab.icon,
-                        color: isSelected ? AppColors.primary : AppColors.textSecondary,
-                        size: 24,
-                      ),
-                      const SizedBox(height: 4),
-                      Text(
-                        tab.label,
-                        style: TextStyle(
-                          fontSize: 12,
-                          color: isSelected ? AppColors.primary : AppColors.textSecondary,
+                return GestureDetector(
+                  onTap: () => setState(() => _currentIndex = index),
+                  behavior: HitTestBehavior.opaque,
+                  child: Container(
+                    padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                    child: Column(
+                      mainAxisSize: MainAxisSize.min,
+                      children: [
+                        Icon(
+                          tab.icon,
+                          color: isSelected
+                              ? theme.colorScheme.primary
+                              : theme.colorScheme.mutedForeground,
+                          size: 24,
                         ),
-                      ),
-                    ],
+                        const SizedBox(height: 4),
+                        Text(
+                          tab.label,
+                          style: TextStyle(
+                            fontSize: 12,
+                            color: isSelected
+                                ? theme.colorScheme.primary
+                                : theme.colorScheme.mutedForeground,
+                            fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
+                          ),
+                        ),
+                      ],
+                    ),
                   ),
-                ),
-              );
-            }).toList(),
+                );
+              }).toList(),
+            ),
           ),
         ),
       ),