feat(PerformanceComparison): 优化性能对比表格样式和功能

- 重构表格样式，改进视觉层次和交互效果
- 调整变化值显示格式，将百分比和差值分开显示
- 增加表格行的悬停效果和斑马纹
- 改进数值格式化函数，添加单位显示
- 增强选择器交互效果和样式
- 添加NaN检查防止计算错误

my-vue-app/src/views/senorManger/components/PerformanceComparison.vue

@@ -25,26 +25,27 @@
       <table class="comparison-table">
         <thead>
           <tr>
-            <th>核心指标</th>
+            <th class="metric-col">核心指标</th>
             <th>本期数据</th>
             <th>{{ selectedPeriodLabel }}数据</th>
-            <th>变化情况</th>
+            <th class="change-col">变化情况</th>
           </tr>
         </thead>
         <tbody>
           <tr v-for="metric in comparedMetrics" :key="metric.key">
-            <td>{{ metric.label }}</td>
+            <td class="metric-col">
+              <span class="metric-label">{{ metric.label }}</span>
+            </td>
             <td>{{ formatValue(metric.current, metric.unit) }}</td>
             <td>{{ formatValue(metric.previous, metric.unit) }}</td>
-            <td>
-              <div class="change-cell" :class="getChangeClass(metric.change.trend)">
-                <span class="change-value">
-                  {{ formatChange(metric.change.diff, metric.unit) }}
-                  ({{ metric.change.percentage }})
-                </span>
+            <td class="change-col">
+              <div class="change-cell">
+                <span class="change-value" :class="getChangeClass(metric.change.trend)">
                   <span v-if="metric.change.trend === 'up'" class="trend-icon">↑</span>
                   <span v-if="metric.change.trend === 'down'" class="trend-icon">↓</span>
-                <span v-if="metric.change.trend === 'neutral'" class="trend-icon">-</span>
+                  {{ metric.change.percentage }}
+                </span>
+                <span class="change-diff">{{ formatChange(metric.change.diff, metric.unit) }}</span>
               </div>
             </td>
           </tr>
@@ -174,7 +175,9 @@ const comparedMetrics = computed(() => {
 });
 
 const calculateChange = (current, previous) => {
-  if (previous === null || previous === undefined) return { diff: 'N/A', percentage: 'N/A', trend: 'neutral' };
+  if (previous === null || previous === undefined || isNaN(current) || isNaN(previous)) {
+    return { diff: 'N/A', percentage: 'N/A', trend: 'neutral' };
+  }
 
   const diff = current - previous;
   let percentage;
@@ -195,7 +198,7 @@ const calculateChange = (current, previous) => {
 const formatValue = (value, unit) => {
   if (value === null || value === undefined) return '-';
   if (unit === '分钟') {
-    return Math.round(value / 60); // 将秒转换为分钟
+    return `${Math.round(value / 60)} 分钟`; 
   }
   if (unit === '%') {
     return `${value.toFixed(1)}%`;
@@ -205,57 +208,79 @@ const formatValue = (value, unit) => {
 
 const formatChange = (diff, unit) => {
   if (typeof diff !== 'number') return '';
-  const formattedDiff = formatValue(Math.abs(diff), unit);
-  return `${diff > 0 ? '+' : '-'}${formattedDiff}`;
+  const prefix = diff > 0 ? '+' : '-';
+  const absDiff = Math.abs(diff);
+
+  if (unit === '分钟') {
+     return `${prefix}${Math.round(absDiff / 60)} 分钟`;
+  }
+  if (unit === '%') {
+    return `${prefix}${absDiff.toFixed(1)}%`;
+  }
+  return `${prefix}${absDiff.toLocaleString()}`;
 };
 
 const getChangeClass = (trend) => {
-  if (trend === 'up') return 'text-positive';
-  if (trend === 'down') return 'text-negative';
-  return 'text-neutral';
+  if (trend === 'up') return 'positive';
+  if (trend === 'down') return 'negative';
+  return 'neutral';
 };
 
 </script>
 
 <style lang="scss" scoped>
 .performance-comparison {
-  background: white;
+  background: #ffffff;
   border-radius: 12px;
-  padding: 1.5rem;
-  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
-  margin-top: 1rem;
+  padding: 2rem;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
+  margin-top: 1.5rem;
+  border: 1px solid #e2e8f0;
 }
 
 .comparison-header {
   display: flex;
   justify-content: space-between;
   align-items: center;
-  margin-bottom: 1.5rem;
+  margin-bottom: 2rem;
+  padding-bottom: 1rem;
+  border-bottom: 1px solid #f1f5f9;
 
   h2 {
-    font-size: 1.4rem;
-    font-weight: 600;
-    color: #1e293b;
+    font-size: 1.5rem;
+    font-weight: 700;
+    color: #1a202c;
     margin: 0;
   }
   
   .period-selector-wrapper {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
+    gap: 0.75rem;
     
     label {
       font-size: 0.9rem;
-      color: #64748b;
+      color: #718096;
     }
 
     .period-select {
-      padding: 0.5rem;
-      border-radius: 6px;
-      border: 1px solid #e2e8f0;
-      background-color: #f8fafc;
+      padding: 0.6rem 1rem;
+      border-radius: 8px;
+      border: 1px solid #cbd5e0;
+      background-color: #ffffff;
       font-size: 0.9rem;
       cursor: pointer;
+      transition: border-color 0.2s, box-shadow 0.2s;
+
+      &:hover {
+        border-color: #a0aec0;
+      }
+
+      &:focus {
+        outline: none;
+        border-color: #4299e1;
+        box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.5);
+      }
     }
   }
 }
@@ -269,67 +294,108 @@ const getChangeClass = (trend) => {
   border-collapse: collapse;
   
   th, td {
-    padding: 0.85rem 1rem;
+    padding: 1rem 1.25rem;
     text-align: left;
-    border-bottom: 1px solid #f1f5f9;
+    vertical-align: middle;
   }
 
   thead th {
     font-size: 0.8rem;
-    color: #64748b;
-    font-weight: 500;
+    color: #718096;
+    font-weight: 600;
     text-transform: uppercase;
-    background-color: #f8fafc;
+    background-color: #f7fafc;
+    border-bottom: 2px solid #e2e8f0;
+  }
+
+  tbody tr {
+    transition: background-color 0.15s ease-in-out;
+    &:nth-child(odd) {
+      background-color: #fdfdff;
+    }
+    &:not(:last-child) {
+        border-bottom: 1px solid #f1f5f9;
+    }
+    &:hover {
+      background-color: #f0f5ff;
+    }
   }
 
   tbody td {
     font-size: 0.95rem;
-    color: #334155;
+    color: #2d3748;
   }
   
-  tbody tr:last-child td {
-    border-bottom: none;
+  .metric-col {
+      min-width: 150px;
+      font-weight: 500;
+  }
+
+  .change-col {
+      width: 180px;
+  }
 }
 
 .change-cell {
   display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 0.25rem;
+
+  .change-value {
+    display: inline-flex;
     align-items: center;
-    gap: 0.5rem;
+    gap: 0.35rem;
     font-weight: 600;
+    padding: 0.25rem 0.6rem;
+    border-radius: 9999px;
+    font-size: 0.85rem;
+
+    &.positive {
+      background-color: #ecfdf5;
+      color: #065f46;
+    }
+    &.negative {
+      background-color: #fff1f2;
+      color: #9f1239;
+    }
+    &.neutral {
+      background-color: #f8fafc;
+      color: #475569;
+    }
 
     .trend-icon {
-      font-size: 1.1rem;
-    }
+      font-size: 1rem;
     }
   }
 
-.text-positive {
-  color: #10b981; /* 绿色 */
+  .change-diff {
+    font-size: 0.8rem;
+    color: #718096;
+    margin-left: 0.25rem;
   }
-.text-negative {
-  color: #ef4444; /* 红色 */
-}
-.text-neutral {
-  color: #64748b; /* 灰色 */
 }
 
+
 .loading-state, .empty-state {
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  padding: 3rem;
-  color: #64748b;
-  font-size: 0.9rem;
+  padding: 4rem;
+  color: #a0aec0;
+  font-size: 1rem;
+  background-color: #f7fafc;
+  border-radius: 8px;
 
   .loading-spinner {
-    width: 32px;
-    height: 32px;
-    border: 3px solid #e2e8f0;
-    border-top: 3px solid #3b82f6;
+    width: 40px;
+    height: 40px;
+    border: 4px solid #e2e8f0;
+    border-top: 4px solid #4299e1;
     border-radius: 50%;
     animation: spin 1s linear infinite;
-    margin-bottom: 1rem;
+    margin-bottom: 1.5rem;
   }
 }