fix: console stays after deploy, auto-refresh, config retry

- 下发后留在控制台，显示状态提示，6秒自动刷新
- 任务页 SSE 自动连接（无需手动点击）
- 总览页有执行中任务时自动刷新
- config_apply 增加 3 次重试（agent 500 时）

internal/service/task.go

@@ -9,6 +9,7 @@ import (
     "path/filepath"
     "strings"
     "sync"
+    "time"
 
     "3588AdminBackend/internal/config"
     "3588AdminBackend/internal/models"
@@ -307,13 +308,26 @@ func (s *TaskService) executeOnDevice(task *models.Task, did string) {
             s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, "invalid payload: "+err.Error())
             return
         }
-        _, code, err := s.agent.Do("PUT", dev.IP, dev.AgentPort, "/v1/config", body)
-        if err != nil {
-            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, err.Error())
+        // Retry config apply up to 3 times (media-server may be slow to reload).
+        var lastErr error
+        var lastCode int
+        for attempt := 0; attempt < 3; attempt++ {
+            if attempt > 0 {
+                time.Sleep(time.Duration(attempt) * 3 * time.Second)
+                s.updateDeviceStatus(task.ID, did, models.TaskRunning, float64(attempt)/3.0, fmt.Sprintf("重试 %d/2", attempt))
+            }
+            _, code, err := s.agent.Do("PUT", dev.IP, dev.AgentPort, "/v1/config", body)
+            if err == nil && code < 400 {
+                lastErr = nil; lastCode = code; break
+            }
+            lastErr = err; lastCode = code
+        }
+        if lastErr != nil {
+            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, lastErr.Error())
             return
         }
-        if code >= 400 {
-            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, fmt.Sprintf("agent error: %d", code))
+        if lastCode >= 400 {
+            s.updateDeviceStatus(task.ID, did, models.TaskFailed, 0, fmt.Sprintf("agent error: %d", lastCode))
             return
         }
         s.updateDeviceStatus(task.ID, did, models.TaskSuccess, 1.0, "")

internal/web/ui.go

@@ -1192,11 +1192,11 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
     }
 
     if len(taskIDs) == 1 {
-        http.Redirect(w, r, "/ui/console?task="+taskIDs[0], http.StatusFound)
+        http.Redirect(w, r, "/ui/console?msg="+url.QueryEscape("正在下发配置...")+"&task="+taskIDs[0], http.StatusFound)
         return
     }
     if len(taskIDs) > 1 {
-        http.Redirect(w, r, "/ui/console?task="+taskIDs[0]+"&msg="+url.QueryEscape(fmt.Sprintf("已为 %d 台设备创建下发任务", len(taskIDs))), http.StatusFound)
+        http.Redirect(w, r, "/ui/console?msg="+url.QueryEscape(fmt.Sprintf("正在为 %d 台设备下发配置...", len(taskIDs))), http.StatusFound)
         return
     }
     if len(errs) > 0 {

internal/web/ui/templates/console.html

@@ -375,11 +375,17 @@
     });
   });
 
-  // Show saved task info from URL param
+  // Show saved task info and auto-refresh from URL param
   (function() {
     var m = location.search.match(/[?&]task=([^&]+)/);
     if (m) {
-      document.getElementById('console-status').innerHTML = '✅ 任务 ' + m[1].substring(0,8) + ' 已创建';
+      document.getElementById('console-status').innerHTML = '⏳ 任务 ' + m[1].substring(0,8) + ' 执行中，页面将自动刷新...';
+      setTimeout(function(){ location.href = '/ui/console'; }, 6000);
+    }
+    var msg = location.search.match(/[?&]msg=([^&]+)/);
+    if (msg) {
+      document.getElementById('console-status').innerHTML = decodeURIComponent(msg[1]);
+      if (!m) setTimeout(function(){ document.getElementById('console-status').innerHTML = ''; }, 5000);
     }
   })();
 })();

internal/web/ui/templates/dashboard.html

@@ -73,5 +73,10 @@
     </table>
   </div>
 </div>
+<script>
+(function(){
+  if({{.RunningTaskCount}}>0) setTimeout(function(){location.reload()},6000);
+})();
+</script>
 
 {{end}}

internal/web/ui/templates/task.html

@@ -144,5 +144,13 @@ function cssEscape(s){
   return String(s).replace(/[^a-zA-Z0-9_-]/g, (c) => "\\"+c);
 }
 syncTaskStatus();
+// Auto-connect SSE and auto-refresh if task is in progress.
+(function(){
+  var s='{{.Task.Status}}';
+  if(s==='running'||s==='pending'){
+    startSSE();
+    setTimeout(function(){location.reload()},8000);
+  }
+})();
 </script>
 {{end}}

internal/web/ui/templates/tasks.html

@@ -1,5 +1,5 @@
 {{define "tasks"}}
-<div class="card">
+<div class="card" id="tasks-container">
   <h2>执行历史</h2>
   <div class="table-wrap" style="margin-top:10px">
     <table>