feat(api,web): support CBZ — scan, métadonnées, lecteur d'albums

- api: cbz utilitaire commun, scanner/métadonnées (+ tests), books, schéma et migrations
- web: CbzReader, ReaderPage/locators (+ tests), types et client API
- shared: types formats

Refs: #16

apps/api/src/scanner/scanner.service.ts

@@ -50,7 +50,7 @@ export class ScannerService {
     }
 
     const now = this.database.now();
-    const format: "epub" | "pdf" = extname(filePath).toLowerCase() === ".epub" ? "epub" : "pdf";
+    const format = bookFormatFromPath(filePath);
     const existing = this.database.db.select({ id: books.id }).from(books).where(eq(books.filePath, filePath)).get();
     const values = {
       libraryId,
@@ -84,8 +84,15 @@ function* walkBooks(root: string): Generator<string> {
     }
     if (!entry.isFile()) continue;
     const extension = extname(entry.name).toLowerCase();
-    if (extension === ".epub" || extension === ".pdf") {
+    if (extension === ".epub" || extension === ".pdf" || extension === ".cbz") {
       yield path;
     }
   }
 }
+
+function bookFormatFromPath(filePath: string): "epub" | "pdf" | "cbz" {
+  const extension = extname(filePath).toLowerCase();
+  if (extension === ".epub") return "epub";
+  if (extension === ".cbz") return "cbz";
+  return "pdf";
+}