Show real-time room metrics and improve sensor cards

Add a summary of real-time metrics per room, including energy, CO2,
sensor count, and occupancy. Sensor cards now display live readings from
the store instead of mock data. Refactor card logic for reactivity and
update navigation colors for clarity.

src/components/modals/ActionModal.vue

@@ -182,7 +182,7 @@ const getUnit = () => {
 const executeAction = async () => {
   isExecuting.value = true
 
-  let parameters: any = {}
+  const parameters: any = {}
 
   if (props.action.type === 'adjust') {
     if (hasNumericRange.value) {