refactor: reorganize all components (#8303)

src/composables/use-link-field.ts

@@ -1,8 +1,8 @@
 import { ComponentInstance } from '../utils';
 import { watch, inject } from 'vue';
 
-export const FORM_KEY = Symbol('Form');
-export const FIELD_KEY = Symbol('Field');
+export const FORM_KEY = Symbol('van-form');
+export const FIELD_KEY = Symbol('van-field');
 
 export function useLinkField(getValue: () => unknown) {
   const field = inject(FIELD_KEY, null) as ComponentInstance | null;

src/composables/use-placeholder.tsx

@@ -1,5 +1,5 @@
+import { Ref } from 'vue';
 import { useHeight } from './use-height';
-import type { Ref } from 'vue';
 import type { BEM } from '../utils/create/bem';
 
 export function usePlaceholder(contentRef: Ref<Element | undefined>, bem: BEM) {