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/library/SeriesDownloadButton.svelte

@@ -20,16 +20,12 @@
   let showQualityPicker = $state(false);
 
   // Count downloads for this series
-  const seriesDownloads = $derived(
-    $videoDownloads.filter((d) => d.seriesName === seriesName)
-  );
+  const seriesDownloads = $derived($videoDownloads.filter((d) => d.seriesName === seriesName));
 
-  const completedCount = $derived(
-    seriesDownloads.filter((d) => d.status === "completed").length
-  );
+  const completedCount = $derived(seriesDownloads.filter((d) => d.status === "completed").length);
 
   const inProgressCount = $derived(
-    seriesDownloads.filter((d) => d.status === "downloading" || d.status === "pending").length
+    seriesDownloads.filter((d) => d.status === "downloading" || d.status === "pending").length,
   );
 
   const hasDownloads = $derived(completedCount > 0 || inProgressCount > 0);
@@ -59,7 +55,7 @@
         seriesName,
         userId,
         basePath,
-        quality
+        quality,
       );
 
       log.debug(`   Queued ${downloadIds.length} episodes for download`);
@@ -113,13 +109,21 @@
   <button
     onclick={handleClick}
     disabled={isProcessing || allDownloaded}
-    class="flex items-center gap-2 px-4 py-2 rounded-lg text-white font-medium transition-colors {getButtonColor()} {isProcessing || allDownloaded ? 'opacity-70 cursor-not-allowed' : ''}"
+    class="flex items-center gap-2 px-4 py-2 rounded-lg text-white font-medium transition-colors {getButtonColor()} {isProcessing ||
+    allDownloaded
+      ? 'opacity-70 cursor-not-allowed'
+      : ''}"
   >
     {#if inProgressCount > 0}
       <!-- Spinner -->
       <svg class="w-5 h-5 animate-spin" fill="none" viewBox="0 0 24 24">
-        <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
-        <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
+        <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"
+        ></circle>
+        <path
+          class="opacity-75"
+          fill="currentColor"
+          d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"
+        ></path>
       </svg>
     {:else if allDownloaded}
       <!-- Checkmark -->
@@ -129,7 +133,11 @@
     {:else}
       <!-- Download icon -->
       <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2">
-        <path stroke-linecap="round" stroke-linejoin="round" d="M12 4v12m0 0l-4-4m4 4l4-4m-9 7h10" />
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          d="M12 4v12m0 0l-4-4m4 4l4-4m-9 7h10"
+        />
       </svg>
     {/if}
     <span>{getButtonText()}</span>
@@ -137,7 +145,9 @@
 
   <!-- Quality picker dropdown -->
   {#if showQualityPicker}
-    <div class="absolute z-50 mt-2 left-0 w-48 bg-[var(--color-surface)] rounded-lg shadow-xl border border-gray-700 overflow-hidden">
+    <div
+      class="absolute z-50 mt-2 left-0 w-48 bg-[var(--color-surface)] rounded-lg shadow-xl border border-gray-700 overflow-hidden"
+    >
       <div class="p-3 border-b border-gray-700">
         <div class="text-sm font-medium text-white">Download Quality</div>
         {#if episodeCount}
@@ -151,14 +161,16 @@
         >
           <span class="text-sm text-white">{preset.label}</span>
           {#if preset.videoBitrate}
-            <span class="text-xs text-gray-500">{Math.round(preset.videoBitrate / 1_000_000)}Mbps</span>
+            <span class="text-xs text-gray-500"
+              >{Math.round(preset.videoBitrate / 1_000_000)}Mbps</span
+            >
           {:else}
             <span class="text-xs text-gray-500">Direct</span>
           {/if}
         </button>
       {/each}
       <button
-        onclick={() => showQualityPicker = false}
+        onclick={() => (showQualityPicker = false)}
         class="w-full px-4 py-3 text-left text-sm text-gray-400 hover:bg-gray-700 border-t border-gray-700"
       >
         Cancel
@@ -171,7 +183,7 @@
 {#if showQualityPicker}
   <button
     class="fixed inset-0 z-40"
-    onclick={() => showQualityPicker = false}
+    onclick={() => (showQualityPicker = false)}
     aria-label="Close quality picker"
   ></button>
 {/if}