fix: 修复做题页测试名称显示bug

src/views/exam/ExamPane.vue

@@ -8,11 +8,10 @@
       >
         <div class="flex-shrink-0">
           <div class="pa-4">
-            <div
-              style="height: 40px; width: 100%"
-              class="indigo lighten-3 rounded-lg justify-center d-flex "
-            >
-              <h2 class="align-self-center">{{ examInfo.examName }}</h2>
+            <div class="indigo lighten-3 rounded-lg justify-center d-flex ">
+              <h2 class="align-self-center text-center">
+                {{ examInfo.examName }}
+              </h2>
             </div>
           </div>
         </div>

src/views/teacher/ExamCreate.vue

@@ -16,7 +16,7 @@
       <v-form ref="form" v-model="valid">
         <v-text-field
           v-model="examName"
-          :counter="20"
+          :counter="25"
           label="评测名称"
           class="ma-4"
           :rules="nameRules"
@@ -290,7 +290,7 @@ export default Vue.extend({
       valid: true,
       nameRules: [
         (v: string) => !!v || '该项为必填项',
-        (v: string) => v.length <= 20 || '字数过多'
+        (v: string) => v.length <= 25 || '字数过多'
       ],
       arrayRules: [(v: [] | string) => v.length > 0 || '该项为必填项'],
       examLengthTicks: [