fix(stock): 修复股票数据显示逻辑和样式问题

- 修复价格为0时显示前收盘价而不是破折号
- 修复涨跌额和涨跌幅为0时显示0.00而不是破折号
- 移除股票价格颜色的CSS变量设置
- 设置默认颜色值为#2e353a确保正确显示

app/common.php

@@ -1855,9 +1855,9 @@ if (!function_exists('fetchStockFromSina')) {
                 return [
                     'code' => $stockCode,
                     'name' => $name,
-                    'price' => $price > 0 ? number_format($price, 2) : '--',
-                    'change' => $price > 0 ? (($change >= 0 ? '+' : '') . number_format($change, 2)) : '--',
-                    'changePercent' => $price > 0 ? (($changePercent >= 0 ? '+' : '') . number_format($changePercent, 2) . '%') : '--',
+                    'price' => $price > 0 ? number_format($price, 2) : number_format($prevClose, 2),
+                    'change' => $price > 0 ? (($change > 0 ? '+' : '') . number_format($change, 2)) : '0.00',
+                    'changePercent' => $price > 0 ? (($changePercent > 0 ? '+' : '') . number_format($changePercent, 2) . '%') : '0.00%',
                     'high' => floatval($fields[4]) > 0 ? number_format(floatval($fields[4]), 2) : '--',
                     'low' => floatval($fields[5]) > 0 ? number_format(floatval($fields[5]), 2) : '--',
                     'volume' => floatval($fields[8]) > 0 ? round(floatval($fields[8]) / 1000000, 2) : '--',

app/controller/frontend/StockController.php

@@ -23,7 +23,7 @@ class StockController extends BaseController
             }
         }
         $change = (string)($stock['change'] ?? '--');
-        $color = '';
+        $color = '#2e353a';
         if ($change !== '--' && $change !== '') {
             if ($change[0] === '+') {
                 $color = '#ef4335';

public/themes/dist_static/static/css/investment.css

@@ -212,7 +212,7 @@
   display: flex;
   align-items: baseline;
   margin-bottom: 5rem;
-  color: var(--color-primary);
+  /*color: var(--color-primary);*/
 }
 .iv-stock__price {
   font-family: "D-DIN-PRO", "MiSans VF", sans-serif;