feat(tenant-platform): editable changelog with audit trail in version table

Adds an edit button (pencil icon) on each row's changelog cell.
Clicking it opens a dialog pre-filled with the current text; saving
calls PATCH /app/{id}/changelog and refreshes the list and op-log.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tenant-platform/src/api/update.ts

@@ -236,6 +236,10 @@ export const updateAdminApi = {
     return updateClient.post(`/api/v1/updates/app/${id}/unpublish`, { reason })
   },
 
+  patchChangeLog(id: string, changeLog: string) {
+    return updateClient.patch<{ data: AppVersion }>(`/api/v1/updates/app/${id}/changelog`, { changeLog })
+  },
+
   grayAppVersion(id: string, body: {
     enabled: boolean
     grayMode: GrayMode

tenant-platform/src/views/update/VersionManagementView.vue

@@ -106,7 +106,16 @@
                 </el-tag>
               </template>
             </el-table-column>
-            <el-table-column prop="changeLog" label="更新说明" show-overflow-tooltip />
+            <el-table-column label="更新说明" min-width="160">
+              <template #default="{row}">
+                <el-tooltip :content="row.changeLog || '（无）'" placement="top" :disabled="!row.changeLog">
+                  <span class="changelog-text">{{ row.changeLog || '—' }}</span>
+                </el-tooltip>
+                <el-button link type="primary" size="small" style="margin-left:4px" @click="openChangelogEdit(row)">
+                  <el-icon><Edit /></el-icon>
+                </el-button>
+              </template>
+            </el-table-column>
             <el-table-column prop="createdAt" label="上传时间" width="160">
               <template #default="{row}">{{ formatTime(row.createdAt) }}</template>
             </el-table-column>
@@ -670,6 +679,22 @@
       </template>
     </el-dialog>
 
+    <!-- Changelog Edit Dialog -->
+    <el-dialog v-model="showChangelogEdit" title="修改更新说明" width="480px">
+      <el-input
+        v-model="changelogEditValue"
+        type="textarea"
+        :rows="5"
+        placeholder="请输入更新说明（可留空）"
+        maxlength="2000"
+        show-word-limit
+      />
+      <template #footer>
+        <el-button @click="showChangelogEdit = false">取消</el-button>
+        <el-button type="primary" :loading="savingChangelog" @click="submitChangelogEdit">保存</el-button>
+      </template>
+    </el-dialog>
+
     <!-- Store Credential Config Dialog -->
     <el-dialog
       v-model="showStoreConfig"
@@ -880,7 +905,7 @@
 import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { CircleCheckFilled, Loading, UploadFilled, WarningFilled } from '@element-plus/icons-vue'
+import { CircleCheckFilled, Edit, Loading, UploadFilled, WarningFilled } from '@element-plus/icons-vue'
 import { appApi, type App } from '@/api/app'
 import { fileApi } from '@/api/file'
 import {
@@ -1471,6 +1496,32 @@ const publishScheduleType = ref<'IMMEDIATE' | 'SCHEDULED'>('IMMEDIATE')
 const publishScheduleAt = ref('')
 const updatingPublishSchedule = ref(false)
 
+const showChangelogEdit = ref(false)
+const changelogEditId = ref('')
+const changelogEditValue = ref('')
+const savingChangelog = ref(false)
+
+function openChangelogEdit(row: AppVersion) {
+  changelogEditId.value = row.id
+  changelogEditValue.value = row.changeLog ?? ''
+  showChangelogEdit.value = true
+}
+
+async function submitChangelogEdit() {
+  savingChangelog.value = true
+  try {
+    await updateAdminApi.patchChangeLog(changelogEditId.value, changelogEditValue.value)
+    ElMessage.success('更新说明已保存')
+    showChangelogEdit.value = false
+    await loadAppVersions()
+    await loadOperationLogs()
+  } catch {
+    ElMessage.error('保存失败')
+  } finally {
+    savingChangelog.value = false
+  }
+}
+
 async function handleCancelReview(storeType?: string) {
   if (!storeReviewDetailVersion.value) return
   const stores = storeType