refactor: remove GetAbsoluteUrl helper and inline URL logic

Replaces the GetAbsoluteUrl method with direct Uri construction
in AniWorldService and STOService. This simplifies absolute URL
generation for DirectViewLinkModel and removes redundant code
from StreamingPortalServiceBase. No functional changes.

Author: SolidProgramming

AniWorldReminder_API/Services/AniWorldService.cs

@@ -387,7 +387,7 @@ void AddRedirectLink(Language language)
                 directViewLinks.Add(new DirectViewLinkModel
                 {
                     Language = language,
-                    DirectLink = GetAbsoluteUrl(redirectLink)
+                    DirectLink = new Uri(new Uri(BaseUrl), redirectLink).ToString()
                 });
             }
 

AniWorldReminder_API/Services/STOService.cs

@@ -413,7 +413,7 @@ private Language GetEpisodeLanguages(int episode, string html)
                 directViewLinks.Add(new DirectViewLinkModel
                 {
                     Language = language.Value,
-                    DirectLink = GetAbsoluteUrl(redirectUrl)
+                    DirectLink = new Uri(new Uri(BaseUrl), redirectUrl).ToString()
                 });
             }
 

AniWorldReminder_API/Services/StreamingPortalServiceBase.cs

@@ -149,14 +149,6 @@ public async Task<bool> InitAsync(WebProxy? proxy = null)
             return await GetCoverArtBase64Async(GetCoverArtUrl(document));
         }
 
-        protected string GetAbsoluteUrl(string redirectUrl)
-        {
-            if (Uri.TryCreate(redirectUrl, UriKind.Absolute, out Uri? absoluteUri))
-                return absoluteUri.ToString();
-
-            return new Uri(new Uri(BaseUrl), redirectUrl).ToString();
-        }
-
         protected abstract List<DirectViewLinkModel>? GetLanguageRedirectLinks(string html);
     }
 }