fix(#189): 驾驶舱主题 token 卸载时清理，修复全局 CSS 变量污染 (#193)

bot_qa 审核通过（issue #189 已关闭），补合并到 main——此前仅审核通过未合并，修复一度丢失。

deploy/fba/fba-ui-src/apps/web-antdv-next/src/views/iaop/cockpit/index.vue

@@ -29,6 +29,9 @@ const loading = ref(true);
 const errorMsg = ref('');
 
 let timer = 0;
+// issue #189：记录注入 :root 的主题变量及其旧值，卸载时恢复，
+// 避免进过驾驶舱后全局 CSS 变量被残留值污染其他页面。
+const injectedTokens: Array<{ key: string; prev: string }> = [];
 
 onMounted(async () => {
   try {
@@ -37,9 +40,12 @@ onMounted(async () => {
     widgets.value = (plan.widgets as unknown as PlanWidget[]) || [];
     // 主题 token 注入 CSS 变量（切模板 = 换一套变量）
     const root = document.documentElement;
-    Object.entries((plan.themeTokens as Record<string, string>) || {}).forEach(([k, v]) =>
-      root.style.setProperty(k, v),
-    );
+    Object.entries((plan.themeTokens as Record<string, string>) || {}).forEach(([k, v]) => {
+      // 先记下旧值，卸载时恢复（getComputedStyle 取级联值；为空表示原本无）
+      const prev = root.style.getPropertyValue(k);
+      injectedTokens.push({ key: k, prev });
+      root.style.setProperty(k, v);
+    });
     timer = window.setInterval(refreshHealth, 2000);
     await refreshHealth();
   } catch {
@@ -49,7 +55,19 @@ onMounted(async () => {
   }
 });
 
-onUnmounted(() => window.clearInterval(timer));
+onUnmounted(() => {
+  window.clearInterval(timer);
+  // issue #189：清理本次注入到 :root 的主题变量，恢复旧值，杜绝全局污染
+  const root = document.documentElement;
+  for (const { key, prev } of injectedTokens) {
+    if (prev) {
+      root.style.setProperty(key, prev);
+    } else {
+      root.style.removeProperty(key);
+    }
+  }
+  injectedTokens.length = 0;
+});
 
 const inferOnline = ref(false);
 async function refreshHealth() {