[Bug] series多的时候，偶现高亮某条线后，其他线的颜色变暗后恢复不了

### Version

5.2.2

### Link to Minimal Reproduction

https://echarts.apache.org/examples/zh/editor.html?code=fVZvT9tGGH_PpzhFk0gGgSSUKQtj0rT2xaRVndRpk4aQ6pKDWIrtyL6sARQp679lIh2M0aGRAgqtQtZNkA7UhhDol8nZySu-Qp87O7EvDrWiJL57_tzz-_2eu1vMqgtE1lS0hFWsSwTf-jol6cS4k2GjQY3_GGgWreZDaHUEwbMAA8T5zx6DgMP3soLBKhCLxKbD0Wg4FkeRSIJ_AuN9U6wmfYafDzNc0TTl7nVxpxNT037zW0Nix1F0ymesZpVvZRWzoqZiwvB3mqwSNh6Lx_l4Hv47EMyM8JHJSdQ5fGnubZiFc3P7bXf7lLYK9HCNbpas8z_N3f12o4luAo6IHp913lSuWsV2o0Bf_QP2nXc12qxetX7zwEg0IqV5pdxpFqn4AfcP9mENzQzaQ6mD1g6yftubWWCVETwr-oYHUs-w0szjf63DTfruiBZasHLa3GLlxG4gWl-HaiFG_LMbEfYgxRALAeSw_rOU7uXp551EQRfaMIqGnEzr7cZr6-EZINjd2WLJdn-lpQItPqWNR_RFzUaN5ejhbm3tm8UNB_TmOi1ug1cOdS5Ozed189nRVavUqT61yn_RJzXH1YMFgAOIKhlG79y8DdOipqNgGsPiYTAyAz9fuDKA17GxnuaHBPKiL0I5sYQ5ccEQGoOYn_axcdhhj7ueiUzWSAX7766zDVT74r21VbOJsWs3iye2OAeQATUjc7diNd9bO497kBS7O-vmiyZaRpzSklmrmGv7vVkvQgbWZd4UPnTS0C3fqEmcs1FyXzlavJc8o8NAS0pE8kQWomcY2p7wnneBDXdczOBgINZZbF-u0epDKDgSjoJaO6VHtHwKr7RRBWW1m2X692v6st6DQFzufcnAP0jpLOuw6QiQeFsiqQlDVoOexU2iKJvq1x0ComOwflgL3W9alYJ5ckAvDoaEVzXZYKGDPKwuqUlNAa2EUWRimkWJOlH4CgV_hqOtlzlXQHPuoubHPWsfsxPNe1SXdzdtzrYdS8RSlRScQPdARiAm9MmqS_cYiubvuRsml_FyBoxHmc2oOLOS8AgFPMc5SyuIvtkzC4fty13zv0q3sEkP9hhb57-jKKLFOmh4kBJWc4J_iwn4E8BKJiUZshFIDEiCzy5qC1k2FbDLDQgWeTGeoWgaSSUQ0bN4nOO_cQydR89OzPM_zPL_AIhgz6q7S5bTUL8_8wM5yWJFxYQuDw4nbgs7x65z2qDuk2fWxZGnO_GC51hmx7FnJyH-NRCcI8BLf0eg5UvrVROaAsCGww3Bxmvvlb1ttsQA_gmOUdT5Zcd6XEVxZ88HOkbddbuQEU1LEznjS6zLS0tYh9xSTjaGeqYx3DWSg442zY4sFSkThK3oS2RMMDmGRKbua4RoCqAbGRa-V0gCzQlefpJs8QZk1ZCT2HNBEC42vJcS4oXEbwoFeQydq4jfjE3eUW9rWQP_mMI4bavtGpHMu_65rwBMH9R277GNYKD37BYetY8LdrT2DsShfCx_JDgcWtnroj-vw1Y7NKLNYo9NW-nO_UnHJKuropxnRqAPHOHPXnMRDX0A&enc=deflate

### Steps to Reproduce

function generateEChartsOption(options = {}) {
const {
startTime = "2025-11-28 00:00:00",
endTime = "2025-11-29 00:00:00",
zoomStartTime = "2025-11-28 05:35:00",
zoomEndTime = "2025-11-28 13:35:00",
numLines = 32,
numPoints = 288
} = options;

// 解析总时间开始和结束为 Date 对象（一天总跨度）
const totalStartDate = new Date(startTime);
const totalEndDate = new Date(endTime);
const totalDuration = totalEndDate - totalStartDate; // 毫秒差值（应为 24 小时 = 86400000 ms）
const interval = totalDuration / (numPoints - 1); // 每个点间隔（均匀分布在一天）

// 生成时间序列（x 轴数据，覆盖全天）
const timestamps = [];
for (let i = 0; i < numPoints; i++) {
const timestamp = new Date(totalStartDate.getTime() + i * interval);
timestamps.push(timestamp.getTime()); // 使用毫秒时间戳
}

// 生成 32 条线的数据（随机 y 值，模拟数据）
const series = [];
for (let lineIndex = 0; lineIndex < numLines; lineIndex++) {
const data = [];
for (let pointIndex = 0; pointIndex < numPoints; pointIndex++) {
// 随机 y 值（例如，0-100 范围，带一些噪声）
const baseValue = 50 + Math.sin(pointIndex / 10 + lineIndex) * 20; // 基础波形
const noise = (Math.random() - 0.5) * 10; // 噪声
data.push([timestamps[pointIndex], baseValue + noise]);
}
series.push({
name: `线条 ${lineIndex + 1}`,
type: 'line',
z: lineIndex + 1, // z 属性依次递增（从 1 到 32）
data: data,
"emphasis": {
"focus": "series"
},
smooth: true, // 启用平滑曲线
lineStyle: {
width: 1
}
});
}

// ECharts option 配置
const echartsOption = {
title: {
text: '32 条线图示例（288 点覆盖一天，dataZoom 聚焦 8 小时）'
},
tooltip: {
trigger: 'axis'
},
legend: {
data: series.map(s => s.name),
bottom: 10
},
dataZoom: [
{
type: "inside",
startValue: zoomStartTime,
endValue: zoomEndTime,
zoomOnMouseWheel: true
}
],
xAxis: {
type: 'time',
name: '时间（全天）'
},
yAxis: {
type: 'value',
name: '数值'
},
series: series
};

return echartsOption;
}

option = generateEChartsOption()

### Current Behavior

偶现线条变暗后恢复不了

### Expected Behavior

线条恢复正常颜色

### Environment

```markdown
- OS:
- Browser:
- Framework:
```

### Any additional comments?

_No response_

Start with the linked minimal reproduction and the generateEChartsOption setup, especially emphasis.focus: "series", z ordering, and the inside dataZoom configuration. Reproduce repeated highlighting with 32 lines, then trace the highlight and unhighlight rendering path; done means every non-focused line returns to its normal color after focus is cleared.

Written by the indexing model from the issue text.