fix(komik): keep api.komiku.org for lists, source genre-list from komiku.org root

Blanket-switching the whole komik module to komiku.org broke the manga
list: komiku.org/manga/?tipe=manga 301-redirects to /pustaka/ (the new
library layout, 0 .bge items), while api.komiku.org/manga/?tipe=manga
serves the .bge grid the parser expects unredirected.

Correct split:
- api_url() = api.komiku.org  -> manga/manhua/manhwa/genre/search lists (.bge layout)
- genre_list fetches base_url() = komiku.org  root, which is POPULATED
  (#Genre .ls3 .ls3p h4 + /genre/<slug>/ links) — api.komiku.org root is empty

Reverts the api_url() half of a46adf1; keeps the underlying insight that
the genre-list needs the populated komiku.org root.

src/application/komik/use_cases.rs

@@ -49,7 +49,7 @@ impl KomikUseCases {
             .get_or_set("komik:genres:list:v3", GENRE_LIST_CACHE_TTL, || async {
                 let html = self
                     .repository
-                    .fetch_html(&self.repository.api_url())
+                    .fetch_html(&self.repository.base_url())
                     .await
                     .map_err(|e| e.to_string())?;
                 let genres = tokio::task::spawn_blocking(move || parser::parse_genres(&html))