refactor(frontend): use symbol for di

packages/frontend/src/components/MkModal.vue

@@ -50,6 +50,7 @@ import { deviceKind } from '@/utility/device-kind.js';
 import { focusTrap } from '@/utility/focus-trap.js';
 import { focusParent } from '@/utility/focus.js';
 import { prefer } from '@/preferences.js';
+import { DI } from '@/di.js';
 
 function getFixedContainer(el: Element | null): Element | null {
 	if (el == null || el.tagName === 'BODY') return null;
@@ -94,7 +95,7 @@ const emit = defineEmits<{
 	(ev: 'closed'): void;
 }>();
 
-provide('modal', true);
+provide(DI.inModal, true);
 
 const maxHeight = ref<number>();
 const fixed = ref(false);

packages/frontend/src/components/MkPostForm.vue

@@ -140,7 +140,7 @@ import { DI } from '@/di.js';
 
 const $i = ensureSignin();
 
-const modal = inject('modal');
+const modal = inject(DI.inModal, false);
 
 const props = withDefaults(defineProps<PostFormProps & {
 	fixed?: boolean;

packages/frontend/src/di.ts

@@ -15,4 +15,5 @@ export const DI = {
 	currentStickyTop: Symbol() as InjectionKey<Ref<number>>,
 	currentStickyBottom: Symbol() as InjectionKey<Ref<number>>,
 	mfmEmojiReactCallback: Symbol() as InjectionKey<(emoji: string) => void>,
+	inModal: Symbol() as InjectionKey<boolean>,
 };