refactor: 清理冗余代码与废弃功能

1. 移除全局css变量中多余的定义
2. 简化通知发送函数参数与逻辑
3. 删除测试通知接口与前端按钮
4. 修复图表容器盒模型样式问题

client/src/App.jsx

@@ -16,13 +16,7 @@ const cssVars = `
   --text-primary: #1a1a1a;
   --text-secondary: #666;
   --text-tertiary: #999;
-  --text-placeholder: #999;
   --border-light: #e8e8e8;
-  --shadow-card: 0 2px 8px rgba(0,0,0,0.08);
-  --color-blue: #4a90e2;
-  --color-orange: #f39c12;
-  --color-purple: #9b59b6;
-  --color-green: #27ae60;
   --tab-bg: #f0f2f5;
   --tab-bg-active: #333;
   --tab-text: #666;
@@ -41,7 +35,6 @@ const cssVars = `
   --text-secondary: #a0a0a0;
   --text-tertiary: #808080;
   --border-light: #333;
-  --shadow-card: none;
   --tab-bg: #2a2a2a;
   --tab-bg-active: #4a90e2;
   --tab-text: #808080;

client/src/pages/Dashboard.jsx

@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback, useRef } from 'react';
 import { Button, Spin, message, DatePicker } from 'antd';
-import { LogoutOutlined, ReloadOutlined, BugOutlined } from '@ant-design/icons';
+import { LogoutOutlined, ReloadOutlined } from '@ant-design/icons';
 import { Lightning, ChartLine, ChartHistogram, Timer } from '@icon-park/react';
 import { Chart, registerables } from 'chart.js';
 import dayjs from 'dayjs';
@@ -108,20 +108,6 @@ export default function Dashboard({ onLogout }) {
     onLogout();
   };
 
-  const handleTestNotify = async () => {
-    try {
-      const res = await fetch('/api/test-notify');
-      const data = await res.json();
-      if (data.success) {
-        message.success('测试消息已发送，请检查通知渠道');
-      } else {
-        message.error('发送失败');
-      }
-    } catch {
-      message.error('发送失败');
-    }
-  };
-
   const handleSendReport = async () => {
     try {
       const res = await fetch('/api/send-report');
@@ -362,19 +348,6 @@ body { margin: 0; }
             >
               手动获取
             </Button>
-            <Button
-              icon={<BugOutlined />}
-              onClick={handleTestNotify}
-              size="small"
-              style={{
-                border: '1px solid var(--border-light)',
-                borderRadius: 20,
-                color: 'var(--text-secondary)',
-                fontSize: 13,
-              }}
-            >
-              测试通知
-            </Button>
             <Button
               onClick={handleSendReport}
               size="small"
@@ -450,7 +423,7 @@ body { margin: 0; }
           <div className="d-chart" style={{ position: 'relative', height: 280, background: 'var(--bg-chart)', borderRadius: 8 }}>
             {(!isToday && (!dateRecords || dateRecords.length === 0)) || (isToday && (!currentData?.todayRecords || currentData.todayRecords.length === 0)) ? (
               <div style={{ position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center', color: 'var(--text-tertiary)' }}>暂无数据</div>
-            ) : <div style={{ padding: 20, height: '100%' }}><canvas ref={hourlyChartRef} /></div>}
+            ) : <div style={{ padding: 20, height: '100%', boxSizing: 'border-box' }}><canvas ref={hourlyChartRef} /></div>}
           </div>
         </div>
 
@@ -484,7 +457,7 @@ body { margin: 0; }
           <div className="d-chart" style={{ position: 'relative', height: 280, background: 'var(--bg-chart)', borderRadius: 8 }}>
             {(!historyData?.dailyRecords || historyData.dailyRecords.length === 0) ? (
               <div style={{ position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center', color: 'var(--text-tertiary)' }}>暂无历史数据</div>
-            ) : <div style={{ padding: 20, height: '100%' }}><canvas ref={trendChartRef} /></div>}
+            ) : <div style={{ padding: 20, height: '100%', boxSizing: 'border-box' }}><canvas ref={trendChartRef} /></div>}
           </div>
         </div>
 

server.js

@@ -136,10 +136,10 @@ async function sendTelegramNotification(text) {
   }
 }
 
-async function sendAllNotifications(markdownContent, plainText) {
+async function sendAllNotifications(markdownContent) {
   await Promise.all([
     sendWecomNotification(markdownContent),
-    sendTelegramNotification(plainText || markdownContent),
+    sendTelegramNotification(markdownContent),
   ]);
 }
 
@@ -242,7 +242,7 @@ async function checkThresholdAndAlert(amount) {
 }
 
 function calculateDailyUsage(records) {
-  if (records.length < 2) return { dailyUsage: 0, todayUsage: 0, todayCost: 0, dailyRecords: [] };
+  if (records.length < 2) return { dailyRecords: [] };
 
   const dailyMap = {};
 
@@ -282,7 +282,7 @@ function calculateDailyUsage(records) {
     prevLastSurplus = lastSurplus;
   }
 
-  return { dailyUsage: 0, todayUsage: 0, todayCost: 0, dailyRecords };
+  return { dailyRecords };
 }
 
 const CLIENT_DIR = path.join(__dirname, 'client', 'dist');
@@ -501,15 +501,6 @@ app.get('/api/trigger-collect', requireAuth, async (req, res) => {
   res.json({ success: true, message: '采集完成' });
 });
 
-app.get('/api/test-notify', requireAuth, async (req, res) => {
-  await sendAllNotifications(
-    '## 电费监控测试消息\n\n' +
-    `> 时间：${new Date().toLocaleString('zh-CN')}\n\n` +
-    '如果收到此消息，说明推送通知配置正常。'
-  );
-  res.json({ success: true, message: '测试消息已发送，请检查通知渠道' });
-});
-
 app.get('/api/send-report', requireAuth, async (req, res) => {
   await sendDailyReport();
   res.json({ success: true, message: '日报已发送' });