fix: 从配置读取刷新间隔，保存设置后立即生效

web/static/app.js

@@ -6,15 +6,29 @@ var refreshTimer = null;
 
 // Initialize
 document.addEventListener('DOMContentLoaded', function() {
+    loadConfig();
     refreshAll();
-    startAutoRefresh();
 });
 
-function startAutoRefresh() {
+function loadConfig() {
+    fetch(API_BASE + '/api/config')
+        .then(function(res) { return res.json(); })
+        .then(function(config) {
+            var interval = config.refresh_interval || 5;
+            startAutoRefresh(interval);
+            document.getElementById('refresh-info').textContent = 'Refresh: ' + interval + 's';
+        })
+        .catch(function(e) {
+            console.error('Load config failed:', e);
+            startAutoRefresh(5);
+        });
+}
+
+function startAutoRefresh(intervalSeconds) {
     if (refreshTimer) {
         clearInterval(refreshTimer);
     }
-    refreshTimer = setInterval(refreshAll, 5000);
+    refreshTimer = setInterval(refreshAll, intervalSeconds * 1000);
 }
 
 function refreshAll() {
@@ -323,6 +337,8 @@ function saveSettings() {
             if (data.success) {
                 alert('Settings saved!');
                 closeSettingsModal();
+                // Reload config to apply new refresh interval
+                loadConfig();
                 refreshAll();
             }
         })