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