simplify gpu/cpu selection

frontend/src/lib/components/ModalTranscriptionForm.svelte

@@ -10,7 +10,7 @@
 	let language = 'auto';
 	let sourceUrl = '';
 	let fileInput;
-	let device = (env.PUBLIC_WHISHPER_GPU) ? 'cuda' : 'cpu';
+	let device = (env.PUBLIC_WHISHPER_PROFILE == "gpu") ? 'cuda' : 'cpu';
 
 	let languages = [
 		'auto',
@@ -182,7 +182,7 @@
 					<span class="label-text">Device</span>
 				</label>
 				<select name="device" bind:value={device} class="select select-bordered">
-					{#if env.PUBLIC_WHISHPER_GPU }
+					{#if env.PUBLIC_WHISHPER_PROFILE == "gpu" }
 						<option selected value="cuda">GPU</option>
 						<option value="cpu">CPU</option>
 					{:else}