feat: add DisclaimerModal component to assessment averages switch

src/interface/components/DisclaimerModal.svelte

@@ -0,0 +1,73 @@
+<script lang="ts">
+  import { fade } from 'svelte/transition';
+  import { animate } from 'motion';
+
+  let { onConfirm, onCancel, title, message } = $props<{
+    onConfirm: () => void;
+    onCancel: () => void;
+    title: string;
+    message: string;
+  }>();
+
+  let modalElement: HTMLElement;
+
+  $effect(() => {
+    if (modalElement) {
+      animate(
+        modalElement,
+        { scale: [0.9, 1], opacity: [0, 1] },
+        {
+          type: 'spring',
+          stiffness: 300,
+          damping: 25
+        }
+      );
+    }
+  });
+</script>
+
+<div 
+  class="flex fixed inset-0 z-[10000] justify-center items-center bg-black/50" 
+  style="position: fixed; top: 0; left: 0; right: 0; bottom: 0;"
+  onclick={(e) => {
+    if (e.target === e.currentTarget) onCancel();
+  }} 
+  onkeydown={(e) => {
+    if (e.key === 'Escape') onCancel();
+  }} 
+  role="button" 
+  tabindex="-1" 
+  transition:fade={{ duration: 150 }}
+>
+  <!-- svelte-ignore a11y_no_static_element_interactions -->
+  <div
+    bind:this={modalElement}
+    class="p-4 mx-4 w-full max-w-md bg-white rounded-2xl shadow-2xl dark:bg-zinc-800" 
+    onclick={(e) => e.stopPropagation()}
+    onkeydown={(e) => e.stopPropagation()}
+  >
+    <h2 class="mb-3 text-xl font-bold text-gray-900 dark:text-white">
+      {title}
+    </h2>
+    
+    <div class="mb-6 text-lg text-gray-700 whitespace-pre-line dark:text-gray-300">
+      {message}
+    </div>
+
+    <div class="flex gap-3 justify-end">
+      <button
+        onclick={onCancel}
+        class="px-4 py-2 text-sm font-medium text-gray-700 bg-gray-100 rounded-lg transition-colors hover:bg-gray-200 dark:bg-zinc-700 dark:text-gray-200 dark:hover:bg-zinc-600"
+      >
+        Cancel
+      </button>
+      <button
+        onclick={onConfirm}
+        class="px-4 py-2 text-sm font-medium text-white bg-green-600 rounded-lg shadow-inner transition-colors hover:bg-green-700 dark:bg-green-500 dark:hover:bg-green-600"
+      >
+        Enable
+      </button>
+    </div>
+  </div>
+</div>
+