enhance(frontend): バブルゲームの諸々を修正・改良2 (#12948)

* (fix) ゲームが正常に終了するように

* (enhance) 効果音の音量を設定可能に

* (add) store

* (add) スクショにロゴの透かしを入れる

* Update packages/frontend/src/pages/drop-and-fusion.vue

Co-authored-by: まっちゃとーにゅ <17376330+u1-liquid@users.noreply.github.com>

* tweak

* tweak

* tweak

* tweak

* Update drop-and-fusion.vue

* tweak

* tweak

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
Co-authored-by: まっちゃとーにゅ <17376330+u1-liquid@users.noreply.github.com>

packages/frontend/src/store.ts

@@ -420,6 +420,13 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: false,
 	},
+	dropAndFusion: {
+		where: 'device',
+		default: {
+			bgmVolume: 0.25,
+			sfxVolume: 1,
+		},
+	},
 
 	sound_masterVolume: {
 		where: 'device',