refactor: remove the button to remove the thumbnail from the post settings (#427)

Signed-off-by: Ryan Wang <i@ryanc.cc>

src/views/post/components/PostSettingModal.vue

@@ -88,8 +88,11 @@
                     class="img"
                     @click="attachmentSelectVisible = true"
                   />
-                  <a-input v-model="form.model.thumbnail" placeholder="点击封面图选择图片，或者输入外部链接"></a-input>
-                  <a-button type="dashed" @click="form.model.thumbnail = null">移除</a-button>
+                  <a-input
+                    v-model="form.model.thumbnail"
+                    allow-clear
+                    placeholder="点击封面图选择图片，或者输入外部链接"
+                  ></a-input>
                 </a-space>
               </div>
             </a-form-item>

src/views/sheet/components/SheetSettingModal.vue

@@ -76,8 +76,11 @@
                     class="img"
                     @click="attachmentSelectVisible = true"
                   />
-                  <a-input v-model="form.model.thumbnail" placeholder="点击封面图选择图片，或者输入外部链接"></a-input>
-                  <a-button type="dashed" @click="form.model.thumbnail = null">移除</a-button>
+                  <a-input
+                    v-model="form.model.thumbnail"
+                    allow-clear
+                    placeholder="点击封面图选择图片，或者输入外部链接"
+                  ></a-input>
                 </a-space>
               </div>
             </a-form-item>
@@ -149,6 +152,7 @@ import pinyin from 'tiny-pinyin'
 import { mapGetters } from 'vuex'
 // apis
 import apiClient from '@/utils/api-client'
+
 export default {
   name: 'SheetSettingModal',
   mixins: [mixin, mixinDevice],