chore(format): run prettier over src/ and scripts/

Formatting was configured but never enforced: `bun run format:check`
reported 199 unformatted files and ran in no workflow and in no git hook,
so .prettierrc (printWidth 100, trailing commas) described an intention
rather than the tree.

This is the one-time sweep that makes the check gateable. Whitespace and
token-reflow only -- no behavioural change: `bun run check` reports 0
errors and all 1053 frontend tests pass before and after.

Kept out of every other commit on purpose. A 199-file diff mixed with
real changes is unreviewable, and the next commit turns format:check
into a hard CI gate so this cannot silently accumulate again.

src/lib/components/player/NextEpisodePopup.svelte

@@ -7,15 +7,14 @@
     initialCountdownSeconds,
     isCountdownActive,
   } from "$lib/stores/nextEpisode";
-  import {
-    cancelAutoPlay,
-    watchNextManually,
-  } from "$lib/services/nextEpisodeService";
+  import { cancelAutoPlay, watchNextManually } from "$lib/services/nextEpisodeService";
   import { auth } from "$lib/stores/auth";
   import CachedImage from "../common/CachedImage.svelte";
 
   // Use series primary image for better visual consistency
-  const imageId = $derived($nextEpisodeItem ? ($nextEpisodeItem.seriesId || $nextEpisodeItem.id) : null);
+  const imageId = $derived(
+    $nextEpisodeItem ? $nextEpisodeItem.seriesId || $nextEpisodeItem.id : null,
+  );
 
   // Format episode info (S1:E5)
   const episodeInfo = $derived.by(() => {
@@ -75,9 +74,7 @@
       <!-- Episode Card -->
       <div class="flex gap-4 p-4">
         <!-- Thumbnail -->
-        <div
-          class="relative flex-shrink-0 w-28 h-16 rounded-lg overflow-hidden bg-gray-800"
-        >
+        <div class="relative flex-shrink-0 w-28 h-16 rounded-lg overflow-hidden bg-gray-800">
           {#if imageId && $nextEpisodeItem.imageId}
             <CachedImage
               itemId={imageId}
@@ -90,14 +87,8 @@
           {/if}
 
           <!-- Play icon overlay -->
-          <div
-            class="absolute inset-0 flex items-center justify-center bg-black/30"
-          >
-            <svg
-              class="w-8 h-8 text-white"
-              fill="currentColor"
-              viewBox="0 0 24 24"
-            >
+          <div class="absolute inset-0 flex items-center justify-center bg-black/30">
+            <svg class="w-8 h-8 text-white" fill="currentColor" viewBox="0 0 24 24">
               <path d="M8 5v14l11-7z" />
             </svg>
           </div>