feat: add miner detail view

backend/app/frontend/static/fleet.js

@@ -112,7 +112,9 @@
     }
 
     function detailLink(miner) {
-        return "/miners/" + encodeURIComponent(miner.id) + "/detail";
+        const returnTo = window.location.pathname + window.location.search;
+        const path = "/miners/" + encodeURIComponent(miner.id) + "/detail";
+        return path + "?return_to=" + encodeURIComponent(returnTo);
     }
 
     function mapLink(miner) {