feat: v1.2 数据可视化与统计增强

新增功能：
- uCharts 集成，支持环形图和折线图
- 统计页分类占比环形图
- 统计页每日趋势折线图
- 统计页增加最大单笔和对比上月指标
- 首页今日支出卡片

组件：
- ChartWrapper 通用图表组件（支持 pie/line/column）
- 支持 H5 和微信小程序双端

依赖：
- 新增 @qiun/ucharts 图表库

client/package-lock.json

@@ -13,6 +13,7 @@
         "@dcloudio/uni-components": "3.0.0-alpha-5010120260525001",
         "@dcloudio/uni-h5": "3.0.0-alpha-5010120260525001",
         "@dcloudio/uni-mp-weixin": "3.0.0-alpha-5010120260525001",
+        "@qiun/ucharts": "^2.5.0-20230101",
         "pinia": "^2.1.7",
         "vue": "^3.4.0"
       },
@@ -5182,6 +5183,12 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "node_modules/@qiun/ucharts": {
+      "version": "2.5.0-20230101",
+      "resolved": "https://registry.npmjs.org/@qiun/ucharts/-/ucharts-2.5.0-20230101.tgz",
+      "integrity": "sha512-C7ccBgfPuGF6dxTRuMW0NPPMSCf1k/kh3I9zkRVBc5PaivudX/rPL+jd2Wty6gn5ya5L3Ob+YmYe09V5xw66Cw==",
+      "license": "Apache"
+    },
     "node_modules/@rollup/pluginutils": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-5.1.0.tgz",