chore(front): 清理 loading.gif 并微调通用表格/字典页样式

- 删除 public/image/loading.gif 与 src/assets/image/loading.gif（未被引用的残留资源）
- main.scss 样式微调
- TablePageAlovaNew.vue 与 ServiceDictManage.vue 同步调整

src/assets/styles/main.scss

@@ -97,17 +97,25 @@ h4.subtitle {
     }
 }
 
+/* 表格加载（规范 §4 表格加载行）：图形=通道 .ysch-spin（随 --brand），本地零图形资产 */
 .table-spin-load {
+    position: relative;
     width: 60px;
     height: 90px;
     padding-top: 60px;
-    background-image: url(../image/loading.gif);
-    background-size: 60px 60px;
-    background-position: top center;
-    background-repeat: no-repeat;
     border: none;
-    color: #577afb;
+    color: var(--brand);
     margin: 0 auto;
+    text-align: center;
+}
+.table-spin-load .ysch-spin {
+    position: absolute;
+    left: 50%;
+    top: 0;
+    width: 60px;
+    height: 60px;
+    margin-left: -30px;
+    font-size: 60px; /* .ysch-spin 尺寸=1em，60px 图形用字号给 */
 }
 
 .ivu-table-cell-tree {

src/components/TablePageAlovaNew.vue

@@ -3,7 +3,7 @@
         <Table :columns="columns" :data="list" :height="tableH" :loading="loading" no-data-text="暂无数据"
             class="link-table table-bottom-box" @on-selection-change="selectChange">
             <template #loading>
-                <div class="table-spin-load">加载中</div>
+                <div class="table-spin-load"><i class="ysch-spin"></i>加载中</div>
             </template>
             <template v-for="slotName in tableSlotNames" :key="slotName" v-slot:[slotName]="slotProps">
                 <slot :name="slotName" v-bind="slotProps" />

src/views/svc/ServiceDictManage.vue

@@ -133,7 +133,11 @@ onMounted(async () => {
                 </div>
                 <div class="table-region" ref="objectRegionRef">
                     <Table :columns="cols" :data="objectRows" :loading="objectLoading" class="link-table table-bottom-box"
-                        :height="objectH || undefined" no-data-text="暂无数据" />
+                        :height="objectH || undefined" no-data-text="暂无数据">
+                        <template #loading>
+                            <div class="table-spin-load"><i class="ysch-spin"></i>加载中</div>
+                        </template>
+                    </Table>
                 </div>
             </div>
 
@@ -149,7 +153,11 @@ onMounted(async () => {
                 </div>
                 <div class="table-region" ref="categoryRegionRef">
                     <Table :columns="cols" :data="categoryRows" :loading="categoryLoading" class="link-table table-bottom-box"
-                        :height="categoryH || undefined" no-data-text="暂无数据" />
+                        :height="categoryH || undefined" no-data-text="暂无数据">
+                        <template #loading>
+                            <div class="table-spin-load"><i class="ysch-spin"></i>加载中</div>
+                        </template>
+                    </Table>
                 </div>
             </div>
         </div>