style(PosterCheckin): 调整海报文字样式和布局

- 增加二维码描述文字的字号和宽度
- 在打卡点名称前添加前缀并调整宽度

@@ -459,11 +459,11 @@ const posterConfig = computed(() => {
         x: 260,
         y: 1125,
         text: currentMockData.value.qrcodeDesc,
-        fontSize: 28,
+        fontSize: 30,
         color: '#333333',
         lineHeight: 40,
         lineNum: 2,
-        width: 400,
+        width: 440,
         textAlign: 'left',
         zIndex: 1
       },
@@ -471,12 +471,12 @@ const posterConfig = computed(() => {
       {
         x: 260,
         y: 1180,
-        text: currentMockData.value.level.name,
+        text: '打卡点: ' + currentMockData.value.level.name,
         fontSize: 32,
         color: '#333333',
         lineHeight: 40,
         lineNum: 2,
-        width: 400,
+        width: 440,
         textAlign: 'left',
         zIndex: 1
       },