Show model modal even if only one model is available (#536)

src/lib/components/chat/ChatIntroduction.svelte

@@ -67,14 +67,12 @@
 					<div class="text-sm text-gray-600 dark:text-gray-400">Current Model</div>
 					<div class="font-semibold">{currentModel.displayName}</div>
 				</div>
-				{#if models.length > 1}
-					<button
-						type="button"
-						on:click={() => (isModelsModalOpen = true)}
-						class="btn ml-auto flex h-7 w-7 self-start rounded-full bg-gray-100 p-1 text-xs hover:bg-gray-100 dark:border-gray-600 dark:bg-gray-800 dark:hover:bg-gray-600"
-						><IconChevron /></button
-					>
-				{/if}
+				<button
+					type="button"
+					on:click={() => (isModelsModalOpen = true)}
+					class="btn ml-auto flex h-7 w-7 self-start rounded-full bg-gray-100 p-1 text-xs hover:bg-gray-100 dark:border-gray-600 dark:bg-gray-800 dark:hover:bg-gray-600"
+					><IconChevron /></button
+				>
 			</div>
 			<ModelCardMetadata variant="dark" model={currentModel} />
 		</div>