refactor: merge end stocktake buttons and attach missing-calculation logic to the primary button

inventory-web/src/views/stock/stocktake/index.vue

@@ -103,13 +103,8 @@
             </el-button>
           </el-col>
           <el-col :span="12">
-            <el-button v-if="userStore.hasPermission('inventory_stocktake:operation')" type="danger" size="large" class="w-100 action-btn" @click="openFinishDialog" :icon="Checked">
-              结束盘点
-            </el-button>
-          </el-col>
-          <el-col :span="12">
-            <el-button v-if="userStore.hasPermission('inventory_stocktake:operation')" type="warning" size="large" class="w-100 action-btn" @click="handleGenerateMissing" :icon="Warning">
-              结束盘点 (计算漏盘)
+            <el-button v-if="userStore.hasPermission('inventory_stocktake:operation')" type="danger" size="large" class="w-100 action-btn" @click="handleGenerateMissing" :icon="Checked">
+              结束盘点并生成差异
             </el-button>
           </el-col>
         </el-row>