feat(web): route season and episode release decks

web/src/series.ts

@@ -22,7 +22,9 @@ export interface ApiSeries {
 
 export interface ApiEpisode {
   id: number;
+  series_id: number;
   season_id: number;
+  season_number: number;
   number: number;
   title: string;
   air_date: string | null;
@@ -54,6 +56,16 @@ export async function fetchSeries(seriesId: number): Promise<ApiSeries | null> {
   }
 }
 
+/** One episode by row id — the `/episodes/{id}/releases` deep link's lookup. */
+export async function fetchEpisode(episodeId: number): Promise<ApiEpisode | null> {
+  try {
+    const response = await fetch(`/api/episodes/${episodeId}`);
+    return response.ok ? ((await response.json()) as ApiEpisode) : null;
+  } catch {
+    return null;
+  }
+}
+
 export async function fetchSeasons(seriesId: number): Promise<SeasonsOutcome> {
   try {
     const response = await fetch(`/api/series/${seriesId}/seasons`);