fix(ui): replace static dropdown backgrounds with transparent mapping (#21728)

src/lib/components/workspace/Models/ModelEditor.svelte

@@ -583,7 +583,7 @@
 
 									<div>
 										<select
-											class="dark:bg-gray-900 text-sm w-full bg-transparent outline-hidden"
+											class="text-sm w-full bg-transparent outline-hidden"
 											placeholder={$i18n.t('Select a base model (e.g. llama3, gpt-4o)')}
 											bind:value={info.base_model_id}
 											required

src/lib/components/workspace/common/AccessControl.svelte

@@ -468,7 +468,7 @@
 				>
 					<select
 						id="models"
-						class="dark:bg-gray-900 outline-none bg-transparent text-sm font-medium block w-fit pr-10 max-w-full placeholder-gray-400"
+						class="outline-none bg-transparent text-sm font-medium block w-fit pr-10 max-w-full placeholder-gray-400"
 						value={!hasPublicReadGrant(accessGrants ?? []) ? 'private' : 'public'}
 						on:change={(e) => {
 							setPublic((e.target as HTMLSelectElement).value === 'public');