功能：补充固定场景助手与GPU健康诊断能力

platform/internal/server/terminal.go

@@ -233,6 +233,15 @@ func (s *Server) deviceAck(c *gin.Context) {
 			s.dbError(c, err)
 			return
 		}
+		// Keep a dedicated, indexed archive for long-lived terminal log search.
+		// The task row remains the audit record; this copy is bounded by the
+		// retention cleanup in observability.go.
+		logText := redactDiagnostic(in.Diagnostics.LogTail)
+		meta, _ := json.Marshal(gin.H{"agentVersion": redactDiagnostic(in.Diagnostics.AgentVersion), "kioskState": redactDiagnostic(in.Diagnostics.KioskState), "uptimeSeconds": in.Diagnostics.UptimeSeconds})
+		if _, err = deviceTx(c).ExecContext(c.Request.Context(), `INSERT INTO terminal_log_archives(id,task_id,terminal_id,captured_at,boot_id,agent_version,kiosk_state,log_text,metadata) VALUES($1,$2,$3,now(),$4,$5,$6,$7,$8) ON CONFLICT(task_id) DO UPDATE SET log_text=EXCLUDED.log_text,metadata=EXCLUDED.metadata`, store.ID("log_"), task.ID, c.GetString("terminalId"), redactDiagnostic(in.Diagnostics.BootID), redactDiagnostic(in.Diagnostics.AgentVersion), redactDiagnostic(in.Diagnostics.KioskState), logText, string(meta)); err != nil {
+			s.dbError(c, err)
+			return
+		}
 	}
 	// Agent text can contain sensitive device details. Keep the public audit message fixed.
 	if err = s.completeTx(c.Request.Context(), deviceTx(c), task, in.Status, "已收到终端执行回执"); err != nil {