add: achievement toggle

Closes #16

packages/backend/src/server/api/endpoints/i/claim-achievement.ts

@@ -6,6 +6,7 @@
 import { Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { AchievementService, ACHIEVEMENT_TYPES } from '@/core/AchievementService.js';
+import { MetaService } from '@/core/MetaService.js';
 
 export const meta = {
 	requireCredential: true,
@@ -24,8 +25,12 @@ export const paramDef = {
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
 		private achievementService: AchievementService,
+		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
+			const meta = await this.metaService.fetch();
+			if (!meta.enableAchievements) return;
+
 			await this.achievementService.create(me.id, ps.name);
 		});
 	}