Wire all dashboard buttons: auth downloads, get_log feedback, action tests.

server/internal/api/fleet_handler.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"strconv"
+	"time"
 
 	"crypto-miner-server/internal/alerts"
 	"crypto-miner-server/internal/db"
@@ -67,12 +68,20 @@ func (f *FleetHandler) GetAgentLog(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "websocket hub unavailable", http.StatusServiceUnavailable)
 		return
 	}
+	content := f.ws.GetAgentLog(id)
 	if r.URL.Query().Get("refresh") == "1" {
 		_ = f.ws.SendAgentCommand(id, "get_log", map[string]interface{}{"tail_lines": 300})
+		for i := 0; i < 12; i++ {
+			time.Sleep(150 * time.Millisecond)
+			if c := f.ws.GetAgentLog(id); c != "" {
+				content = c
+				break
+			}
+		}
 	}
 	writeJSON(w, map[string]interface{}{
 		"agent_id": id,
-		"content":  f.ws.GetAgentLog(id),
+		"content":  content,
 	})
 }