fix(web): 订阅选季「全部季」与轨道间距

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

apps/web/app/components/library/episode-structure.tsx

@@ -312,7 +312,7 @@ export function SubscriptionSeasonPicker({
   return (
     <div className="space-y-2">
       <StructureTrack options={options} value={selected} onChange={setPicked} />
-      <div className="flex flex-wrap items-center gap-2">
+      <div className="flex flex-wrap items-center gap-2 pt-1">
         <Button
           type="button"
           size="sm"