Show getnetworkhashps core result in dashboard + update unit formatting

backend/src/routes.ts

@@ -630,6 +630,7 @@ class Routes {
       res.json({
         hashrates: hashrates,
         difficulty: difficulty,
+        currentHashrate: await bitcoinClient.getNetworkHashPs()
       });
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);