add empty tips

miniprogram/pages/main/tabs/moment/index.less

@@ -100,6 +100,13 @@
 			}
 		}
 	}
+
+	.empty-state {
+		display: flex;
+		min-height: 60vh;
+		align-items: center;
+		justify-content: center;
+	}
 }
 
 .t-popup--bottom {
@@ -187,4 +194,4 @@
 			}
 		}
 	}
-}
+}

miniprogram/pages/main/tabs/moment/index.wxml

@@ -49,6 +49,9 @@
 			>删除已选</t-button>
 		</view>
 	</view>
+	<view wx:if="{{!canUpload && list.length === 0}}" class="empty-state">
+		<t-empty icon="image-error" description="暂无临时照片或视频" />
+	</view>
 	<view wx:if="{{canUpload && isUploading}}" class="uploading">
 		<progress
 			class="progress"