fix(market-ranking): 最新价格式化与涨跌色对齐商品期权

- 去掉 formatPrice 的 .toFixed(2)，改为直接显示原始数值
- 平盘/无值颜色从 price_even 改为 elements_text_primary_02，与商品期权 getPriceColor 逻辑一致

src/main/ets/market-ranking/MarketRankingNodeComponent.ets

@@ -11,7 +11,7 @@ import {
   contractsToPlaceholderCardData,
 } from './MarketRankingDataMapper';
 import { MarketRankingHqRequestClient } from '../node/clients/MarketRankingHqRequestClient';
-import { formatGreatNumber, formatPercent, formatPrice, riseFallColor } from '../common/NumberFormat';
+import { formatGreatNumber, formatPercent, riseFallColor } from '../common/NumberFormat';
 import { AllCardsCard } from '../node/model/AiDiagnosisNodeModel';
 import { PERIOD_RANGES, TAB_METRICS } from './MarketRankingConstant';
 import { enableDarkMode } from '@kernel/theme_manager';
@@ -606,8 +606,8 @@ export struct MarketRankingNodeComponent {
         .width('35%')
         .maxLines(1)
         .textOverflow({ overflow: TextOverflow.Ellipsis })
-      Text(formatPrice(item.price))
-        .fontColor(riseFallColor(item.price_chg))
+      Text(item.price !== undefined ? item.price.toString() : '--')
+        .fontColor(this.getPriceColor(item.price_chg))
         .fontSize(16)
         .fontWeight(500)
         .maxFontSize(16)
@@ -720,4 +720,16 @@ export struct MarketRankingNodeComponent {
     const raw = (metricId === MetricId.RISE_SPEED || metricId === MetricId.FALL_SPEED) ? item.chg_speed : item.price_chg;
     return riseFallColor(raw);
   }
+
+  private getPriceColor(priceChg?: number): ResourceStr {
+    if (priceChg === undefined) {
+      return $r('app.color.elements_text_primary_02')
+    }
+    if (priceChg > 0) {
+      return $r('app.color.price_up_100')
+    } else if (priceChg < 0) {
+      return $r('app.color.price_down_100')
+    }
+    return $r('app.color.elements_text_primary_02')
+  }
 }