修复几个前端小bug

.gitignore

@@ -1,3 +1,5 @@
+package-lock.json
+
 # Logs
 logs
 *.log

src/pages/oj/views/contest/ContestDetail.vue

@@ -109,7 +109,7 @@
           {
             title: this.$i18n.t('m.ContestType'),
             render: (h, params) => {
-              return h('span', this.$i18n.t('m.' + params.row.contest_type.replace(' ', '_')))
+              return h('span', this.$i18n.t('m.' + params.row.contest_type ? params.row.contest_type.replace(' ', '_') : ''))
             }
           },
           {

src/pages/oj/views/problem/Problem.vue

@@ -291,7 +291,9 @@
           })
           problem.languages = problem.languages.sort()
           this.problem = problem
-          this.changePie(problem)
+          if (problem.statistic_info) {
+            this.changePie(problem)
+          }
 
           // 在beforeRouteEnter中修改了, 说明本地有code，无需加载template
           if (this.code !== '') {