feat: add multi-provider support (Komga + Stripstream Librarian)

- Introduce provider abstraction layer (IMediaProvider, KomgaProvider, StripstreamProvider)
- Add Stripstream Librarian as second media provider with full feature parity
- Migrate all pages and components from direct Komga services to provider factory
- Remove dead service code (BaseApiService, HomeService, LibraryService, SearchService, TestService)
- Fix library/series page-based pagination for both providers (Komga 0-indexed, Stripstream 1-indexed)
- Fix unread filter and search on library page for both providers
- Fix read progress display for Stripstream (reading_status mapping)
- Fix series read status (books_read_count) for Stripstream
- Add global search with series results for Stripstream (series_hits from Meilisearch)
- Fix thumbnail proxy to return 404 gracefully instead of JSON on upstream error
- Replace duration-based cache debug detection with x-nextjs-cache header

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/series/[seriesId]/page.tsx

@@ -1,5 +1,6 @@
 import { PreferencesService } from "@/lib/services/preferences.service";
-import { SeriesService } from "@/lib/services/series.service";
+import { getProvider } from "@/lib/providers/provider.factory";
+
 import { FavoriteService } from "@/lib/services/favorite.service";
 import { SeriesClientWrapper } from "./SeriesClientWrapper";
 import { SeriesContent } from "./SeriesContent";
@@ -7,6 +8,7 @@ import { ErrorMessage } from "@/components/ui/ErrorMessage";
 import { AppError } from "@/utils/errors";
 import { ERROR_CODES } from "@/constants/errorCodes";
 import type { UserPreferences } from "@/types/preferences";
+import { redirect } from "next/navigation";
 
 interface PageProps {
   params: Promise<{ seriesId: string }>;
@@ -18,28 +20,38 @@ const DEFAULT_PAGE_SIZE = 20;
 export default async function SeriesPage({ params, searchParams }: PageProps) {
   const seriesId = (await params).seriesId;
   const page = (await searchParams).page;
-  const unread = (await searchParams).unread;
   const size = (await searchParams).size;
-
+  const unread = (await searchParams).unread;
   const currentPage = page ? parseInt(page) : 1;
   const preferences: UserPreferences = await PreferencesService.getPreferences();
 
-  // Utiliser le paramètre d'URL s'il existe, sinon utiliser la préférence utilisateur
   const unreadOnly = unread !== undefined ? unread === "true" : preferences.showOnlyUnread;
-  const effectivePageSize = size ? parseInt(size) : preferences.displayMode?.itemsPerPage || DEFAULT_PAGE_SIZE;
+  const effectivePageSize = size
+    ? parseInt(size)
+    : preferences.displayMode?.itemsPerPage || DEFAULT_PAGE_SIZE;
 
   try {
-    const [books, series, isFavorite] = await Promise.all([
-      SeriesService.getSeriesBooks(seriesId, currentPage - 1, effectivePageSize, unreadOnly),
-      SeriesService.getSeries(seriesId),
+    const provider = await getProvider();
+    if (!provider) redirect("/settings");
+
+    const [booksPage, series, isFavorite] = await Promise.all([
+      provider.getBooks({
+        seriesName: seriesId,
+        cursor: String(currentPage),
+        limit: effectivePageSize,
+        unreadOnly,
+      }),
+      provider.getSeriesById(seriesId),
       FavoriteService.isFavorite(seriesId),
     ]);
 
+    if (!series) throw new AppError(ERROR_CODES.SERIES.FETCH_ERROR);
+
     return (
       <SeriesClientWrapper seriesId={seriesId}>
         <SeriesContent
           series={series}
-          books={books}
+          books={booksPage}
           currentPage={currentPage}
           preferences={preferences}
           unreadOnly={unreadOnly}
@@ -49,10 +61,16 @@ export default async function SeriesPage({ params, searchParams }: PageProps) {
       </SeriesClientWrapper>
     );
   } catch (error) {
-    const errorCode = error instanceof AppError 
-      ? error.code 
-      : ERROR_CODES.BOOK.PAGES_FETCH_ERROR;
-    
+    if (
+      error instanceof AppError &&
+      (error.code === ERROR_CODES.KOMGA.MISSING_CONFIG ||
+        error.code === ERROR_CODES.STRIPSTREAM.MISSING_CONFIG)
+    ) {
+      redirect("/settings");
+    }
+
+    const errorCode = error instanceof AppError ? error.code : ERROR_CODES.BOOK.PAGES_FETCH_ERROR;
+
     return (
       <main className="container mx-auto px-4 py-8">
         <ErrorMessage errorCode={errorCode} />