fix: refresh feed when switching channels

qa/frontend/test_home_channel_request_race_static.php

@@ -0,0 +1,22 @@
+<?php
+
+$root = dirname(__DIR__, 2);
+$pageFile = $root . '/uniapp/src/pages/index/index.vue';
+$source = file_get_contents($pageFile);
+
+$checks = [
+    '首页维护资讯请求序号' => str_contains($source, 'let feedRequestId = 0'),
+    '频道重载强制发起新请求' => str_contains($source, 'fetchFeedList(true)'),
+    '强制请求不受旧 loading 状态阻塞' => str_contains($source, 'const fetchFeedList = async (force = false)'),
+    '旧请求响应不会覆盖新频道' => str_contains($source, 'if (requestId !== feedRequestId) return'),
+    '只有最新请求能够结束 loading' => str_contains($source, 'if (requestId === feedRequestId)'),
+];
+
+foreach ($checks as $label => $passed) {
+    if (!$passed) {
+        fwrite(STDERR, "FAIL: {$label}\n");
+        exit(1);
+    }
+}
+
+echo "首页频道切换请求竞态静态检查通过\n";