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/actions/stripstream-config.ts

@@ -0,0 +1,183 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import prisma from "@/lib/prisma";
+import { getCurrentUser } from "@/lib/auth-utils";
+import { StripstreamProvider } from "@/lib/providers/stripstream/stripstream.provider";
+import { AppError } from "@/utils/errors";
+import { ERROR_CODES } from "@/constants/errorCodes";
+import type { ProviderType } from "@/lib/providers/types";
+
+/**
+ * Sauvegarde la configuration Stripstream
+ */
+export async function saveStripstreamConfig(
+  url: string,
+  token: string
+): Promise<{ success: boolean; message: string }> {
+  try {
+    const user = await getCurrentUser();
+    if (!user) {
+      return { success: false, message: "Non authentifié" };
+    }
+    const userId = parseInt(user.id, 10);
+
+    await prisma.stripstreamConfig.upsert({
+      where: { userId },
+      update: { url, token },
+      create: { userId, url, token },
+    });
+
+    revalidatePath("/settings");
+    return { success: true, message: "Configuration Stripstream sauvegardée" };
+  } catch (error) {
+    if (error instanceof AppError) {
+      return { success: false, message: error.message };
+    }
+    return { success: false, message: "Erreur lors de la sauvegarde" };
+  }
+}
+
+/**
+ * Teste la connexion à Stripstream Librarian
+ */
+export async function testStripstreamConnection(
+  url: string,
+  token: string
+): Promise<{ success: boolean; message: string }> {
+  try {
+    const provider = new StripstreamProvider(url, token);
+    const result = await provider.testConnection();
+
+    if (!result.ok) {
+      return { success: false, message: result.error ?? "Connexion échouée" };
+    }
+
+    return { success: true, message: "Connexion Stripstream réussie !" };
+  } catch (error) {
+    if (error instanceof AppError) {
+      return { success: false, message: error.message };
+    }
+    return { success: false, message: "Erreur lors du test de connexion" };
+  }
+}
+
+/**
+ * Définit le provider actif de l'utilisateur
+ */
+export async function setActiveProvider(
+  provider: ProviderType
+): Promise<{ success: boolean; message: string }> {
+  try {
+    const user = await getCurrentUser();
+    if (!user) {
+      return { success: false, message: "Non authentifié" };
+    }
+    const userId = parseInt(user.id, 10);
+
+    // Vérifier que le provider est configuré avant de l'activer
+    if (provider === "komga") {
+      const config = await prisma.komgaConfig.findUnique({ where: { userId } });
+      if (!config) {
+        return { success: false, message: "Komga n'est pas encore configuré" };
+      }
+    } else if (provider === "stripstream") {
+      const config = await prisma.stripstreamConfig.findUnique({ where: { userId } });
+      if (!config) {
+        return { success: false, message: "Stripstream n'est pas encore configuré" };
+      }
+    }
+
+    await prisma.user.update({
+      where: { id: userId },
+      data: { activeProvider: provider },
+    });
+
+    revalidatePath("/");
+    revalidatePath("/settings");
+    return {
+      success: true,
+      message: `Provider actif : ${provider === "komga" ? "Komga" : "Stripstream Librarian"}`,
+    };
+  } catch (error) {
+    if (error instanceof AppError) {
+      return { success: false, message: error.message };
+    }
+    return { success: false, message: "Erreur lors du changement de provider" };
+  }
+}
+
+/**
+ * Récupère la configuration Stripstream de l'utilisateur
+ */
+export async function getStripstreamConfig(): Promise<{
+  url?: string;
+  hasToken: boolean;
+} | null> {
+  try {
+    const user = await getCurrentUser();
+    if (!user) return null;
+    const userId = parseInt(user.id, 10);
+
+    const config = await prisma.stripstreamConfig.findUnique({
+      where: { userId },
+      select: { url: true },
+    });
+
+    if (!config) return null;
+    return { url: config.url, hasToken: true };
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Récupère le provider actif de l'utilisateur
+ */
+export async function getActiveProvider(): Promise<ProviderType> {
+  try {
+    const user = await getCurrentUser();
+    if (!user) return "komga";
+    const userId = parseInt(user.id, 10);
+
+    const dbUser = await prisma.user.findUnique({
+      where: { id: userId },
+      select: { activeProvider: true },
+    });
+
+    return (dbUser?.activeProvider as ProviderType) ?? "komga";
+  } catch {
+    return "komga";
+  }
+}
+
+/**
+ * Vérifie quels providers sont configurés
+ */
+export async function getProvidersStatus(): Promise<{
+  komgaConfigured: boolean;
+  stripstreamConfigured: boolean;
+  activeProvider: ProviderType;
+}> {
+  try {
+    const user = await getCurrentUser();
+    if (!user) {
+      return { komgaConfigured: false, stripstreamConfigured: false, activeProvider: "komga" };
+    }
+    const userId = parseInt(user.id, 10);
+
+    const [dbUser, komgaConfig, stripstreamConfig] = await Promise.all([
+      prisma.user.findUnique({ where: { id: userId }, select: { activeProvider: true } }),
+      prisma.komgaConfig.findUnique({ where: { userId }, select: { id: true } }),
+      prisma.stripstreamConfig.findUnique({ where: { userId }, select: { id: true } }),
+    ]);
+
+    return {
+      komgaConfigured: !!komgaConfig,
+      stripstreamConfigured: !!stripstreamConfig,
+      activeProvider: (dbUser?.activeProvider as ProviderType) ?? "komga",
+    };
+  } catch {
+    return { komgaConfigured: false, stripstreamConfigured: false, activeProvider: "komga" };
+  }
+}