Refactor tmdbImageUrl to accept semantic category instead of size string

- Change primary argument from TMDB size string (`w500`, `w1280`, etc.)
  to category name (`posters`, `backdrops`, `stills`, `logos`,
  `profiles`); optional size override remains as third argument
- Update all call sites across services, actions, pages, and route
  handlers to use the new category-based API
- Update image.test.ts to match the new signature and replace
  size-mapping test descriptions with category-name descriptions

lib/services/credits.ts

@@ -316,6 +316,6 @@ export function getCastForTitle(titleId: string): CastMember[] {
 
   return rows.map((r) => ({
     ...r,
-    profilePath: tmdbImageUrl(r.profilePath, "w185"),
+    profilePath: tmdbImageUrl(r.profilePath, "profiles"),
   }));
 }

lib/services/discovery.ts

@@ -505,7 +505,7 @@ export function getRecommendationsForTitle(titleId: string) {
         tmdbId: r.tmdbId,
         type: r.type as "movie" | "tv",
         title: r.title,
-        posterPath: tmdbImageUrl(r.posterPath, "w500"),
+        posterPath: tmdbImageUrl(r.posterPath, "posters"),
         releaseDate: r.releaseDate,
         firstAirDate: r.firstAirDate,
         voteAverage: r.voteAverage,

lib/services/metadata.ts

@@ -610,7 +610,7 @@ function fetchSeasonsFromDb(titleId: string): Season[] {
       episodeNumber: ep.episodeNumber,
       name: ep.name,
       overview: ep.overview,
-      stillPath: tmdbImageUrl(ep.stillPath, "w1280", "stills"),
+      stillPath: tmdbImageUrl(ep.stillPath, "stills"),
       airDate: ep.airDate,
       runtimeMinutes: ep.runtimeMinutes,
     });
@@ -763,7 +763,7 @@ function readAvailability(
     .map((a) => ({
       providerId: a.providerId,
       providerName: a.providerName,
-      logoPath: tmdbImageUrl(a.logoPath, "w92"),
+      logoPath: tmdbImageUrl(a.logoPath, "logos"),
       offerType: a.offerType,
       watchUrl: generateProviderUrl(a.providerId, titleName),
     }));
@@ -852,8 +852,8 @@ export async function getOrFetchTitle(id: string): Promise<{
     overview: title.overview,
     releaseDate: title.releaseDate,
     firstAirDate: title.firstAirDate,
-    posterPath: tmdbImageUrl(title.posterPath, "w500"),
-    backdropPath: tmdbImageUrl(title.backdropPath, "w1280"),
+    posterPath: tmdbImageUrl(title.posterPath, "posters"),
+    backdropPath: tmdbImageUrl(title.backdropPath, "backdrops"),
     popularity: title.popularity,
     voteAverage: title.voteAverage,
     voteCount: title.voteCount,

lib/services/person.ts

@@ -46,7 +46,7 @@ export async function getOrFetchPerson(
         birthday: details.birthday,
         deathday: details.deathday,
         placeOfBirth: details.place_of_birth,
-        profilePath: tmdbImageUrl(details.profile_path, "w185"),
+        profilePath: tmdbImageUrl(details.profile_path, "profiles"),
         knownForDepartment: details.known_for_department,
         imdbId: details.imdb_id,
       };
@@ -63,7 +63,7 @@ export async function getOrFetchPerson(
     birthday: person.birthday,
     deathday: person.deathday,
     placeOfBirth: person.placeOfBirth,
-    profilePath: tmdbImageUrl(person.profilePath, "w185"),
+    profilePath: tmdbImageUrl(person.profilePath, "profiles"),
     knownForDepartment: person.knownForDepartment,
     imdbId: person.imdbId,
   };
@@ -116,7 +116,7 @@ export async function getOrFetchPersonByTmdbId(
       birthday: person.birthday,
       deathday: person.deathday,
       placeOfBirth: person.placeOfBirth,
-      profilePath: tmdbImageUrl(person.profilePath, "w185"),
+      profilePath: tmdbImageUrl(person.profilePath, "profiles"),
       knownForDepartment: person.knownForDepartment,
       imdbId: person.imdbId,
     };
@@ -151,7 +151,7 @@ export function getLocalFilmography(personId: string): PersonCredit[] {
     tmdbId: r.tmdbId,
     type: r.type as "movie" | "tv",
     title: r.title,
-    posterPath: tmdbImageUrl(r.posterPath, "w500"),
+    posterPath: tmdbImageUrl(r.posterPath, "posters"),
     releaseDate: r.releaseDate,
     firstAirDate: r.firstAirDate,
     voteAverage: r.voteAverage,
@@ -245,7 +245,7 @@ export async function fetchFullFilmography(
       tmdbId: c.id,
       type: c.media_type as "movie" | "tv",
       title: c.title ?? c.name ?? "Unknown",
-      posterPath: tmdbImageUrl(c.poster_path, "w500"),
+      posterPath: tmdbImageUrl(c.poster_path, "posters"),
       releaseDate: c.release_date ?? null,
       firstAirDate: c.first_air_date ?? null,
       voteAverage: c.vote_average,