fix: review fixes (#17208)

* fix: OAuthのContent-Typeを正しく判定するように

* fix(frontend): fix outdated comments

* fix: storagePersistenceのtop-level awaitを解消

* fix

* fix(frontend): add comment

Co-Authored-By: anatawa12 <anatawa12@icloud.com>

* fix

* fix: rename `users/get-following-users-by-birthday`

* fix: fix types

* Update MkForm.vue

* refactor utility/storage.ts

---------

Co-authored-by: anatawa12 <anatawa12@icloud.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/frontend/src/components/MkDraggable.vue

@@ -109,6 +109,7 @@ function onDragstart(ev: DragEvent, item: T) {
 
 	// Chromeのバグで、Dragstartハンドラ内ですぐにDOMを変更する(=リアクティブなプロパティを変更する)とDragが終了してしまう
 	// SEE: https://stackoverflow.com/questions/19639969/html5-dragend-event-firing-immediately
+	// SEE: https://issues.chromium.org/issues/41150279
 	window.setTimeout(() => {
 		dragging.value = true;
 	}, 10);

packages/frontend/src/components/MkForm.vue

@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="Object.keys(form).filter(item => !form[item].hidden).length > 0" class="_gaps_m">
+<div v-if="Object.values(form).filter(item => typeof item.hidden !== 'boolean' || item.hidden === true).length > 0" class="_gaps_m">
 	<template v-for="v, k in form">
 		<template v-if="typeof v.hidden == 'function' ? v.hidden(values) : v.hidden"></template>
 		<MkInput v-else-if="v.type === 'number'" v-model="values[k]" type="number" :step="v.step || 1" :manualSave="v.manualSave" @savingStateChange="(changed, invalid) => onSavingStateChange(k, changed, invalid)">