Refactor dashboard layout and update sensor table columns

- Make metric cards and charts more compact and consistent - Change
SensorConsumptionTable columns: show Room and Value, remove
Current/Total/Average - Update headings and layout for AnalyticsView and
HomeView - Improve responsiveness and spacing for cards and sections

src/components/cards/MetricCard.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="bg-white rounded-2xl shadow-sm flex flex-col justify-between h-full w-full p-4">
+  <div class="bg-white rounded-2xl shadow-sm flex flex-col justify-between aspect-square p-4">
     <h6 class="text-sm font-bold text-gray-500">{{ title }}</h6>
     <div class="flex-grow flex items-center justify-start">
       <p class="text-gray-900 font-bold text-2xl">