refactor(episode): migrate episode upload to Livewire with real-time CDN verification

Replace the server-rendered episode upload form with a Livewire component,
introducing an interactive admin experience that validates the new episode's
stream path against all configured mirrors before saving. The controller-based
`store` method and its route are removed, and episode creation now flows
through the `AdminEpisodeForm` component with frontend upload handling and
dynamic quality checks.

Key changes:
- Add `AdminEpisodeForm` Livewire component with file uploads, tag handling,
  and debounced stream/base-url validation.
- Extend `CdnPathValidator::validateStream` to accept an episode number so the
  manifest path can point to the specific episode being added.
- Remove the `store` method from `EpisodeController` and its POST route.
- Delete the legacy `createEpisode` method from `EpisodeService`.
- Replace the Blade upload modal with the Livewire view, including progress
  indicators and validation badges.
- Add feature tests for the Livewire component and update unit tests for the
  CDN validator's episode-specific manifest check.

app/Http/Controllers/Admin/EpisodeController.php

@@ -30,34 +30,6 @@ class EpisodeController extends Controller
         $this->downloadService = $downloadService;
     }
 
-    /**
-     * Add Episode to existing series
-     */
-    public function store(Request $request): RedirectResponse
-    {
-        $referenceEpisode = Episode::with('hentai')->where('id', $request->input('episode_id'))->firstOrFail();
-        $episodeNumber = $referenceEpisode->hentai->episodes()->count() + 1;
-
-        // Create Episode
-        $episode = $this->episodeService->createEpisode($request, $referenceEpisode->hentai, $episodeNumber, null, $referenceEpisode);
-        $this->episodeService->createOrUpdateCover($request, $episode, $referenceEpisode->hentai->slug, 1);
-        $this->downloadService->createOrUpdateDownloads($request, $episode, 1);
-        $this->galleryService->createOrUpdateGallery($request, $referenceEpisode->hentai, $episode, $episodeNumber, true);
-
-        // Discord Alert
-        if ($request->has('censored')) {
-            DiscordReleaseNotification::dispatch($referenceEpisode->title.' - '.$episodeNumber, 'release-censored');
-        } else {
-            DiscordReleaseNotification::dispatch($episode->slug, 'release');
-        }
-
-        cache()->flush();
-
-        return to_route('hentai.index', [
-            'title' => $episode->slug,
-        ]);
-    }
-
     /**
      * Edit Episode
      */