feat: implement caching strategy for API responses and adjust loading timeout in CoverClient for improved performance

src/app/api/komga/home/route.ts

@@ -3,12 +3,16 @@ import { HomeService } from "@/lib/services/home.service";
 import { ERROR_CODES } from "@/constants/errorCodes";
 import { AppError } from "@/utils/errors";
 import { getErrorMessage } from "@/utils/errors";
-export const dynamic = "force-dynamic";
+export const revalidate = 60;
 
 export async function GET() {
   try {
     const data = await HomeService.getHomeData();
-    return NextResponse.json(data);
+    return NextResponse.json(data, {
+      headers: {
+        'Cache-Control': 'public, s-maxage=60, stale-while-revalidate=120'
+      }
+    });
   } catch (error) {
     console.error("API Home - Erreur:", error);
     if (error instanceof AppError) {

src/app/api/komga/libraries/[libraryId]/series/route.ts

@@ -4,7 +4,7 @@ import { ERROR_CODES } from "@/constants/errorCodes";
 import { AppError } from "@/utils/errors";
 import { getErrorMessage } from "@/utils/errors";
 import type { NextRequest } from "next/server";
-export const dynamic = "force-dynamic";
+export const revalidate = 60;
 
 const DEFAULT_PAGE_SIZE = 20;
 
@@ -26,7 +26,14 @@ export async function GET(
       LibraryService.getLibrary(libraryId)
     ]);
 
-    return NextResponse.json({ series, library });
+    return NextResponse.json(
+      { series, library },
+      {
+        headers: {
+          'Cache-Control': 'public, s-maxage=60, stale-while-revalidate=120'
+        }
+      }
+    );
   } catch (error) {
     console.error("API Library Series - Erreur:", error);
     if (error instanceof AppError) {

src/app/api/komga/series/[seriesId]/books/route.ts

@@ -4,7 +4,7 @@ import { ERROR_CODES } from "@/constants/errorCodes";
 import { AppError } from "@/utils/errors";
 import { getErrorMessage } from "@/utils/errors";
 import type { NextRequest } from "next/server";
-export const dynamic = "force-dynamic";
+export const revalidate = 60;
 
 const DEFAULT_PAGE_SIZE = 20;
 
@@ -25,7 +25,14 @@ export async function GET(
       SeriesService.getSeries(seriesId)
     ]);
 
-    return NextResponse.json({ books, series });
+    return NextResponse.json(
+      { books, series },
+      {
+        headers: {
+          'Cache-Control': 'public, s-maxage=60, stale-while-revalidate=120'
+        }
+      }
+    );
   } catch (error) {
     console.error("API Series Books - Erreur:", error);
     if (error instanceof AppError) {

src/app/api/komga/series/[seriesId]/route.ts

@@ -5,7 +5,7 @@ import { AppError } from "@/utils/errors";
 import type { KomgaSeries } from "@/types/komga";
 import { getErrorMessage } from "@/utils/errors";
 import type { NextRequest } from "next/server";
-export const dynamic = "force-dynamic";
+export const revalidate = 60;
 
 export async function GET(
   request: NextRequest,
@@ -15,7 +15,11 @@ export async function GET(
     const seriesId: string = (await params).seriesId;
 
     const series: KomgaSeries = await SeriesService.getSeries(seriesId);
-    return NextResponse.json(series);
+    return NextResponse.json(series, {
+      headers: {
+        'Cache-Control': 'public, s-maxage=60, stale-while-revalidate=120'
+      }
+    });
   } catch (error) {
     console.error("API Series - Erreur:", error);
     if (error instanceof AppError) {