Cleanup and zip handling

src/lib/catalog/db.ts

@@ -1,8 +1,8 @@
-import type { Volume } from '$lib/upload';
+import type { Volume } from '$lib/types';
 import Dexie, { type Table } from 'dexie';
 
 export interface Catalog {
-  id?: number;
+  id: string;
   manga: Volume[];
 }
 
@@ -12,7 +12,7 @@ export class CatalogDexie extends Dexie {
   constructor() {
     super('mokuro');
     this.version(1).stores({
-      catalog: '++id, manga'
+      catalog: 'id, manga'
     });
   }
 }