feat: 清理示例数据并统一空态体验

frontend/src/views/ia/ProjectMilestones.vue

@@ -102,17 +102,15 @@
           <el-table-column prop="remark" :label="TEXT.modules.projectMilestones.columns.remark" min-width="100">
             <template #default="scope">{{ scope.row.remark || TEXT.common.fallback }}</template>
           </el-table-column>
-          <el-table-column :label="TEXT.modules.projectMilestones.columns.operations" width="84" fixed="right">
+          <el-table-column :label="TEXT.modules.projectMilestones.columns.operations" width="84">
             <template #default="scope">
               <el-button link type="primary" @click="openEditor(scope.row)">{{ TEXT.common.actions.edit }}</el-button>
             </template>
           </el-table-column>
+          <template #empty>
+            <div v-if="!loading" class="table-empty">{{ TEXT.modules.projectMilestones.emptyDescription }}</div>
+          </template>
         </el-table>
-
-        <StateEmpty
-          v-if="!loading && rows.length === 0"
-          :description="TEXT.modules.projectMilestones.emptyDescription"
-        />
       </section>
     </div>
     <StateEmpty v-else :description="TEXT.common.empty.selectProject" />
@@ -665,4 +663,15 @@ watch(
 .ctms-table :deep(.el-table__inner-wrapper::before) {
   display: none;
 }
+
+.table-empty {
+  min-height: 220px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: #8a97ab;
+  font-size: 14px;
+  font-weight: 500;
+  letter-spacing: 0.02em;
+}
 </style>