fix(forecast): 调整对话框宽度为1200px以显示完整内容

src/views/forecast/index.vue

@@ -57,7 +57,7 @@
     <el-dialog
       :title="dialogTitle"
       :visible.sync="dialogVisible"
-      width="800px"
+      width="1200px"
       :close-on-click-modal="false"
       :close-on-press-escape="false"
       append-to-body