feat: enhance Stripstream configuration handling

- Introduced a new resolver function to streamline fetching Stripstream configuration from the database or environment variables.
- Updated various components and API routes to utilize the new configuration resolver, improving code maintainability and reducing direct database calls.
- Added optional environment variables for Stripstream URL and token in the .env.example file.
- Refactored image loading logic in the reader components to improve performance and error handling.

src/lib/providers/provider.factory.ts

@@ -1,5 +1,6 @@
 import prisma from "@/lib/prisma";
 import { getCurrentUser } from "@/lib/auth-utils";
+import { getResolvedStripstreamConfig } from "./stripstream/stripstream-config-resolver";
 import type { IMediaProvider } from "./provider.interface";
 
 export async function getProvider(): Promise<IMediaProvider | null> {
@@ -13,7 +14,7 @@ export async function getProvider(): Promise<IMediaProvider | null> {
     select: {
       activeProvider: true,
       config: { select: { url: true, authHeader: true } },
-      stripstreamConfig: { select: { url: true, token: true } },
+      stripstreamConfig: { select: { id: true } },
     },
   });
 
@@ -21,12 +22,12 @@ export async function getProvider(): Promise<IMediaProvider | null> {
 
   const activeProvider = dbUser.activeProvider ?? "komga";
 
-  if (activeProvider === "stripstream" && dbUser.stripstreamConfig) {
-    const { StripstreamProvider } = await import("./stripstream/stripstream.provider");
-    return new StripstreamProvider(
-      dbUser.stripstreamConfig.url,
-      dbUser.stripstreamConfig.token
-    );
+  if (activeProvider === "stripstream") {
+    const resolved = await getResolvedStripstreamConfig(userId);
+    if (resolved) {
+      const { StripstreamProvider } = await import("./stripstream/stripstream.provider");
+      return new StripstreamProvider(resolved.url, resolved.token);
+    }
   }
 
   if (activeProvider === "komga" || !dbUser.activeProvider) {

src/lib/providers/stripstream/stripstream-config-resolver.ts

@@ -0,0 +1,26 @@
+import prisma from "@/lib/prisma";
+
+export interface ResolvedStripstreamConfig {
+  url: string;
+  token: string;
+  source: "db" | "env";
+}
+
+/**
+ * Résout la config Stripstream : d'abord en base (par utilisateur), sinon depuis les env STRIPSTREAM_URL et STRIPSTREAM_TOKEN.
+ */
+export async function getResolvedStripstreamConfig(
+  userId: number
+): Promise<ResolvedStripstreamConfig | null> {
+  const fromDb = await prisma.stripstreamConfig.findUnique({
+    where: { userId },
+    select: { url: true, token: true },
+  });
+  if (fromDb) return { ...fromDb, source: "db" };
+
+  const url = process.env.STRIPSTREAM_URL?.trim();
+  const token = process.env.STRIPSTREAM_TOKEN?.trim();
+  if (url && token) return { url, token, source: "env" };
+
+  return null;
+}