feat: polish Mine Map UX

backend/app/frontend/views.py

@@ -110,6 +110,10 @@ def _map_content(can_manage_locations: bool = False) -> str:
         <div class="field map-search"><label for="mapSearch">Find miner</label>
             <input id="mapSearch" type="search" autocomplete="off"
                 placeholder="Asset ID, serial, MAC, or IP"></div>
+        <label class="map-problems-control" for="mapProblemsOnly">
+            <input id="mapProblemsOnly" type="checkbox">
+            <span>Problems only</span>
+        </label>
     </div>
     <details class="map-filters" id="mapFilters">
         <summary>Filters <span id="mapFilterCount" aria-live="polite"></span></summary>