feat: add image optimization and settings page

- Add persistent disk cache for processed images
- Optimize image processing with short-circuit and quality settings
- Add WebP lossy encoding with configurable quality
- Add settings API endpoints (GET/POST /settings, cache management)
- Add database table for app configuration
- Add /settings page in backoffice for image/cache/limits config
- Add cache stats and clear functionality
- Update navigation with settings link

apps/backoffice/app/libraries/[id]/series/page.tsx

@@ -1,4 +1,5 @@
-import { fetchLibraries, fetchSeries, getBookCoverUrl, LibraryDto, SeriesDto } from "../../../../lib/api";
+import { fetchLibraries, fetchSeries, getBookCoverUrl, LibraryDto, SeriesDto, SeriesPageDto } from "../../../../lib/api";
+import { CursorPagination } from "../../../components/ui";
 import Image from "next/image";
 import Link from "next/link";
 import { notFound } from "next/navigation";
@@ -7,26 +8,36 @@ import { LibrarySubPageHeader } from "../../../components/LibrarySubPageHeader";
 export const dynamic = "force-dynamic";
 
 export default async function LibrarySeriesPage({
-  params
+  params,
+  searchParams
 }: {
   params: Promise<{ id: string }>;
+  searchParams: Promise<{ [key: string]: string | string[] | undefined }>;
 }) {
   const { id } = await params;
+  const searchParamsAwaited = await searchParams;
+  const cursor = typeof searchParamsAwaited.cursor === "string" ? searchParamsAwaited.cursor : undefined;
+  const limit = typeof searchParamsAwaited.limit === "string" ? parseInt(searchParamsAwaited.limit) : 20;
   
-  const [library, series] = await Promise.all([
+  const [library, seriesPage] = await Promise.all([
     fetchLibraries().then(libs => libs.find(l => l.id === id)),
-    fetchSeries(id).catch(() => [] as SeriesDto[])
+    fetchSeries(id, cursor, limit).catch(() => ({ items: [] as SeriesDto[], next_cursor: null }) as SeriesPageDto)
   ]);
 
   if (!library) {
     notFound();
   }
 
+  const series = seriesPage.items;
+  const nextCursor = seriesPage.next_cursor;
+  const hasNextPage = !!nextCursor;
+  const hasPrevPage = !!cursor;
+
   return (
     <div className="space-y-6">
       <LibrarySubPageHeader
         library={library}
-        title={`Series (${series.length})`}
+        title="Series"
         icon={
           <svg className="w-8 h-8" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 11V9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10" />
@@ -36,35 +47,45 @@ export default async function LibrarySeriesPage({
       />
 
       {series.length > 0 ? (
-        <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-6">
-          {series.map((s) => (
-            <Link 
-              key={s.name} 
-              href={`/libraries/${id}/books?series=${encodeURIComponent(s.name)}`}
-              className="group"
-            >
-              <div className="bg-card rounded-xl shadow-sm border border-border/60 overflow-hidden hover:shadow-md transition-shadow duration-200">
-                <div className="aspect-[2/3] relative bg-muted/50">
-                  <Image
-                    src={getBookCoverUrl(s.first_book_id)}
-                    alt={`Cover of ${s.name}`}
-                    fill
-                    className="object-cover"
-                    unoptimized
-                  />
+        <>
+          <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 gap-6">
+            {series.map((s) => (
+              <Link 
+                key={s.name} 
+                href={`/libraries/${id}/books?series=${encodeURIComponent(s.name)}`}
+                className="group"
+              >
+                <div className="bg-card rounded-xl shadow-sm border border-border/60 overflow-hidden hover:shadow-md transition-shadow duration-200">
+                  <div className="aspect-[2/3] relative bg-muted/50">
+                    <Image
+                      src={getBookCoverUrl(s.first_book_id)}
+                      alt={`Cover of ${s.name}`}
+                      fill
+                      className="object-cover"
+                      unoptimized
+                    />
+                  </div>
+                  <div className="p-3">
+                    <h3 className="font-medium text-foreground truncate text-sm" title={s.name}>
+                      {s.name === "unclassified" ? "Unclassified" : s.name}
+                    </h3>
+                    <p className="text-xs text-muted-foreground mt-1">
+                      {s.book_count} book{s.book_count !== 1 ? 's' : ''}
+                    </p>
+                  </div>
                 </div>
-                <div className="p-3">
-                  <h3 className="font-medium text-foreground truncate text-sm" title={s.name}>
-                    {s.name === "unclassified" ? "Unclassified" : s.name}
-                  </h3>
-                  <p className="text-xs text-muted-foreground mt-1">
-                    {s.book_count} book{s.book_count !== 1 ? 's' : ''}
-                  </p>
-                </div>
-              </div>
-            </Link>
-          ))}
-        </div>
+              </Link>
+            ))}
+          </div>
+          
+          <CursorPagination
+            hasNextPage={hasNextPage}
+            hasPrevPage={hasPrevPage}
+            pageSize={limit}
+            currentCount={series.length}
+            nextCursor={nextCursor}
+          />
+        </>
       ) : (
         <div className="text-center py-12 text-muted-foreground">
           <p>No series found in this library</p>

apps/backoffice/app/libraries/page.tsx

@@ -32,8 +32,8 @@ export default async function LibrariesPage() {
   const seriesCounts = await Promise.all(
     libraries.map(async (lib) => {
       try {
-        const series = await fetchSeries(lib.id);
-        return { id: lib.id, count: series.length };
+        const seriesPage = await fetchSeries(lib.id);
+        return { id: lib.id, count: seriesPage.items.length };
       } catch {
         return { id: lib.id, count: 0 };
       }