feat: add sort/filter component for watchlist

- create reusable SortFilter templ component with sort options (date, title, score)
- integrate sort/filter into watchlist page with query params
- add sortEntries method to handle client-side sorting
- add CSS styling for sort filter controls
- pass sort params through status tab and view toggle links

internal/jikan/search.go

@@ -34,7 +34,7 @@ func (c *Client) Search(query string, page int) (SearchResult, error) {
 	return res, nil
 }
 
-// GetTopAnime fetches the top anime by popularity
+// GetTopAnime fetches the top anime by popularity (default) or other filters
 func (c *Client) GetTopAnime(page int) (TopAnimeResult, error) {
 	if page < 1 {
 		page = 1