fix: prevent cached task loading mask from sticking

src/api/trainingTask.js

@@ -79,6 +79,8 @@ export function getTrainingTaskByKey(taskKey) {
     return Promise.resolve({ code: 200, data: preview.taskConfig });
   }
   if (pendingTaskRequests.has(normalizedTaskKey)) {
+    // 页面切回时可能复用仍在进行的请求；重新通知当前路由显示加载状态。
+    notifyStudentTaskConfigLoading(normalizedTaskKey, true);
     return pendingTaskRequests.get(normalizedTaskKey);
   }
   notifyStudentTaskConfigLoading(normalizedTaskKey, true);

src/layout/components/AppMain.vue

@@ -63,7 +63,9 @@ function handleStudentTaskConfigLoading(event) {
   studentTaskLoading.value = Boolean(detail.loading);
 }
 watch(currentStudentTaskKey, (taskKey) => {
-  studentTaskLoading.value = Boolean(taskKey);
+  // 已缓存的实训页重新激活时不会再次执行 onMounted 请求，不能仅因路由
+  // 切换而保留遮罩；真实请求会通过 student-task-config-loading 事件重新打开。
+  studentTaskLoading.value = false;
 }, { immediate: true });
 onMounted(() => window.addEventListener("student-task-config-loading", handleStudentTaskConfigLoading));
 onBeforeUnmount(() => window.removeEventListener("student-task-config-loading", handleStudentTaskConfigLoading));

tests/student-task-loading-lifecycle.static.test.cjs

@@ -0,0 +1,23 @@
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+
+const root = path.join(__dirname, "..");
+const appMain = fs.readFileSync(path.join(root, "src", "layout", "components", "AppMain.vue"), "utf8");
+const trainingTaskApi = fs.readFileSync(path.join(root, "src", "api", "trainingTask.js"), "utf8");
+
+assert(
+  appMain.includes("studentTaskLoading.value = false;"),
+  "切回已缓存的学生实训页时，旧加载遮罩必须先清除"
+);
+assert(
+  !appMain.includes("studentTaskLoading.value = Boolean(taskKey);"),
+  "路由切换不能在没有真实请求时强制显示实训加载遮罩"
+);
+assert.match(
+  trainingTaskApi,
+  /if \(pendingTaskRequests\.has\(normalizedTaskKey\)\) \{[\s\S]*?notifyStudentTaskConfigLoading\(normalizedTaskKey, true\);[\s\S]*?return pendingTaskRequests\.get\(normalizedTaskKey\);/,
+  "复用进行中的任务配置请求时，必须重新广播加载状态"
+);
+
+console.log("student task loading lifecycle static checks passed");