fix：修复了app独立发课的一些问题

src/views/app/tagGroup/index.vue

@@ -81,7 +81,7 @@
           <el-input v-model="form.name" placeholder="请输入名称"  />
         </el-form-item>
         <el-form-item label="排序" prop="sortOrder">
-          <el-input-number v-model="form.sortOrder" placeholder="请输入排序" />
+          <el-input-number v-model="form.sortOrder" :min="0" placeholder="请输入排序" />
         </el-form-item>
         <el-row>
           <el-col :span="3"><div style="margin-top: 9px;font-weight: bold;float: right; margin-right: 10px;">标签</div></el-col>
@@ -94,7 +94,7 @@
               </el-table-column>
               <el-table-column label="排序" prop="sortOrder" align="center" >
                 <template slot-scope="scope">
-                  <el-input-number v-model="scope.row.sortOrder"  ></el-input-number>
+                  <el-input-number v-model="scope.row.sortOrder" :min="0" ></el-input-number>
                 </template>
               </el-table-column>
               <el-table-column label="操作" width="150px" align="center">

src/views/app/urgentClass/index.vue

@@ -123,7 +123,7 @@
                                 transform: translate(-50%, -50%) rotate(-45deg);
                             "></span>
 
-                          <!-- 未完成 - 方框 + 叉 -->
+                          <!-- 待学习 - 方框 + 叉（与底部图例一致） -->
                             <span v-if="log == 3" style="
                                 position: absolute;
                                 top: 50%;
@@ -133,6 +133,15 @@
                                 background: #666;
                                 transform: translate(-50%, -50%) rotate(45deg);">
                             </span>
+                            <span v-if="log == 3" style="
+                                position: absolute;
+                                top: 50%;
+                                left: 50%;
+                                width: 8px;
+                                height: 2px;
+                                background: #666;
+                                transform: translate(-50%, -50%) rotate(-45deg);">
+                            </span>
 
 
                             <span v-if="log == 1" style="

src/views/app/welcome/index.vue

@@ -18,7 +18,7 @@
                 </div>
             </el-form-item>
             <el-form-item label="创建时间" prop="createTime">
-                <el-date-picker clearable size="small" v-model="queryParams.createdTime" type="date"
+                <el-date-picker clearable size="small" v-model="queryParams.createTime" type="date"
                     value-format="yyyy-MM-dd" placeholder="选择创建时间">
                 </el-date-picker>
             </el-form-item>