fix: 盯盘防闪烁(watchRendering守卫+60s刷新)

static/index.html

@@ -1513,9 +1513,12 @@ function watchResetFilters() {
   renderWatch();
 }
 
+let watchRendering = false;
 async function renderWatch() {
+  if (watchRendering) return;
+  watchRendering = true;
   const el = document.getElementById('watchContent');
-  if (!el) return;
+  if (!el) { watchRendering = false; return; }
   try {
     if (watchTimer) clearInterval(watchTimer);
     if (!watchChipsInit) { watchRenderChips(); watchChipsInit = true; }
@@ -1657,6 +1660,8 @@ async function renderWatch() {
   } catch(e) {
     el.innerHTML = '<div class="p-6 text-red-400 text-sm">加载失败: ' + e.message + '</div>';
     watchTimer = setInterval(renderWatch, 60000);
+  } finally {
+    watchRendering = false;
   }
 }