Fix delete locks

src/manager.js

@@ -142,6 +142,7 @@ export class ZimManager {
 		const match = local.find(l => l.name === nameOrFile || l.href === nameOrFile);
 		if (!match) throw new Error(`ZIM not found locally: ${nameOrFile}`);
 		const file = match.href + (match.href.endsWith('.zim') ? '' : '.zim');
+		await this.#server.stop();
 		await fs.promises.rm(path.join(this.#dir, file), {force: true});
 		await this.#ensureServer();
 		await this.#waitUntilVisible(file, {expect: false});