fix(ui): remove duplicate download items in manage slide over

Prevents duplicate download items from being displayed by filtering
based on title uniqueness. This improves UI clarity when the same
content appears multiple times in the download status.

Author: InterN0te

server/lib/downloadtracker.ts

@@ -7,7 +7,7 @@ import { uniqWith } from 'lodash';
 
 interface EpisodeNumberResult {
   seasonNumber: number;
-  episodeNumber: number;
+  episodeNumber: number | number[];
   absoluteEpisodeNumber: number;
   id: number;
 }

src/components/DownloadBlock/index.tsx

@@ -32,7 +32,7 @@ const DownloadBlock = ({
           ? intl.formatMessage(messages.formattedTitle, {
               title,
               seasonNumber: downloadItem?.episode?.seasonNumber,
-              episodeNumber: downloadItem?.episode?.episodeNumber,
+              episodeNumber: Array.isArray(downloadItem?.episode?.episodeNumber) ? downloadItem?.episode?.episodeNumber.join(', ') : downloadItem?.episode?.episodeNumber,
             })
           : title}
       </div>

src/components/ManageSlideOver/index.tsx

@@ -25,6 +25,7 @@ import {
 } from '@server/constants/media';
 import { MediaServerType } from '@server/constants/server';
 import type { MediaWatchDataResponse } from '@server/interfaces/api/mediaInterfaces';
+import { DownloadingItem } from '@server/lib/downloadtracker';
 import type { RadarrSettings, SonarrSettings } from '@server/lib/settings';
 import type { MovieDetails } from '@server/models/Movie';
 import type { TvDetails } from '@server/models/Tv';
@@ -69,6 +70,49 @@ const isMovie = (movie: MovieDetails | TvDetails): movie is MovieDetails => {
   return (movie as MovieDetails).title !== undefined;
 };
 
+const groupDownloadBySeason = (items: DownloadingItem[] | undefined) => {
+  if (!items || items.length === 0) return [];
+
+  const groupedItems: DownloadingItem[] = [];
+
+  items.forEach(item => {
+    // Group by title and season number
+    const existingIndex = groupedItems.findIndex(grouped =>
+      grouped.title === item.title &&
+      grouped.episode?.seasonNumber === item.episode?.seasonNumber
+    );
+
+    if (existingIndex >= 0) {
+      const existing = groupedItems[existingIndex];
+
+      // Merge episodes from same season
+      if (existing.episode && item.episode) {
+        const existingEpisodes = existing.episode.episodeNumber
+          ? existing.episode.episodeNumber as number[]
+          : [];
+        const newEpisode = item.episode.episodeNumber as number;
+
+        if (newEpisode && !existingEpisodes.includes(newEpisode)) {
+          existingEpisodes.push(newEpisode);
+          existing.episode.episodeNumber = existingEpisodes.sort((a, b) => a - b);
+        }
+      }
+    } else {
+      const newItem = {
+        ...item,
+        episode: item.episode ? {
+          ...item.episode,
+          episodeNumber: [item.episode.episodeNumber as number],
+          seasonNumber: item.episode.seasonNumber
+        } : undefined
+      };
+      groupedItems.push(newItem);
+    }
+  });
+
+  return groupedItems;
+};
+
 interface ManageSlideOverProps {
   // mediaType: 'movie' | 'tv';
   show?: boolean;
@@ -205,7 +249,7 @@ const ManageSlideOver = ({
             </h3>
             <div className="overflow-hidden rounded-md border border-gray-700 shadow">
               <ul>
-                {data.mediaInfo?.downloadStatus?.map((status, index) => (
+                {groupDownloadBySeason(data.mediaInfo?.downloadStatus).map((status, index) => (
                   <Tooltip
                     key={`dl-status-${status.externalId}-${index}`}
                     content={status.title}
@@ -215,7 +259,7 @@ const ManageSlideOver = ({
                     </li>
                   </Tooltip>
                 ))}
-                {data.mediaInfo?.downloadStatus4k?.map((status, index) => (
+                {groupDownloadBySeason(data.mediaInfo?.downloadStatus4k).map((status, index) => (
                   <Tooltip
                     key={`dl-status-${status.externalId}-${index}`}
                     content={status.title}