feat: add custom download URL for manual update method

- Add custom_download_url field to Version model
- Show custom download URL input when update method is 'manual'
- Use platform default URL if custom URL is not set
- Add i18n translations for new field

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/pages/admin/versions/[id].vue

@@ -46,6 +46,7 @@ const formData = ref({
   update_strategy: 'optional' as 'optional' | 'forced',
   update_type: 'full' as 'full' | 'patch',
   update_method: 'auto' as 'auto' | 'manual',
+  custom_download_url: '',
   changelog: '',
   entry_file: '',
   file: null as File | null,
@@ -97,6 +98,7 @@ async function fetchVersion() {
       formData.value.update_strategy = ver.update_strategy || 'optional'
       formData.value.update_type = ver.update_type || 'full'
       formData.value.update_method = ver.update_method || 'auto'
+      formData.value.custom_download_url = ver.custom_download_url || ''
       formData.value.changelog = ver.changelog || ''
       formData.value.entry_file = ver.entry_file || ''
     }
@@ -184,6 +186,7 @@ async function handleSubmit() {
       update_strategy: formData.value.update_strategy,
       update_type: formData.value.update_type,
       update_method: formData.value.update_method,
+      custom_download_url: formData.value.custom_download_url,
       changelog: formData.value.changelog,
       entry_file: formData.value.entry_file,
     }
@@ -460,6 +463,18 @@ onMounted(() => {
                 </UiSelect>
               </div>
 
+              <div v-if="formData.update_method === 'manual'" class="space-y-2">
+                <UiLabel>{{ t('admin.versions.createForm.customDownloadUrl') }}</UiLabel>
+                <p class="text-sm text-muted-foreground">
+                  {{ t('admin.versions.createForm.customDownloadUrlDesc') }}
+                </p>
+                <UiInput
+                  v-model="formData.custom_download_url"
+                  :placeholder="t('admin.versions.createForm.customDownloadUrlPlaceholder')"
+                  :disabled="saving"
+                />
+              </div>
+
               <div class="space-y-2">
                 <UiLabel for="changelog">
                   {{ t('admin.versions.createForm.changelog') }}
@@ -516,6 +531,10 @@ onMounted(() => {
                     : t('admin.versions.methods.manual')
                   }}</span>
                 </div>
+                <div v-if="formData.update_method === 'manual'" class="flex justify-between text-sm">
+                  <span class="text-muted-foreground">{{ t('admin.versions.createForm.previewCustomDownloadUrl') }}</span>
+                  <span class="truncate max-w-[120px]">{{ formData.custom_download_url || t('admin.versions.createForm.useDefault') }}</span>
+                </div>
               </div>
 
               <div class="border-t pt-4 mt-4">

frontend/src/pages/admin/versions/create.vue

@@ -45,6 +45,7 @@ const formData = ref({
   update_strategy: 'optional' as 'optional' | 'forced',
   update_type: 'full' as 'full' | 'patch',
   update_method: 'auto' as 'auto' | 'manual',
+  custom_download_url: '',
   changelog: '',
   entry_file: '',
   file: null as File | null,
@@ -188,6 +189,7 @@ async function handleSubmit() {
       update_strategy: formData.value.update_strategy,
       update_type: formData.value.update_type,
       update_method: formData.value.update_method,
+      custom_download_url: formData.value.custom_download_url,
       changelog: formData.value.changelog,
       entry_file: formData.value.entry_file,
       file_path: uploadedData.value.file_path,
@@ -454,6 +456,18 @@ onMounted(() => {
                 </UiSelect>
               </div>
 
+              <div v-if="formData.update_method === 'manual'" class="space-y-2">
+                <UiLabel>{{ t('admin.versions.createForm.customDownloadUrl') }}</UiLabel>
+                <p class="text-sm text-muted-foreground">
+                  {{ t('admin.versions.createForm.customDownloadUrlDesc') }}
+                </p>
+                <UiInput
+                  v-model="formData.custom_download_url"
+                  :placeholder="t('admin.versions.createForm.customDownloadUrlPlaceholder')"
+                  :disabled="saving"
+                />
+              </div>
+
               <div class="space-y-2">
                 <UiLabel for="changelog">
                   {{ t('admin.versions.createForm.changelog') }}
@@ -516,6 +530,10 @@ onMounted(() => {
                   <span class="text-muted-foreground">{{ t('admin.versions.createForm.previewUpdateMethod') }}</span>
                   <span>{{ methodLabel }}</span>
                 </div>
+                <div v-if="formData.update_method === 'manual'" class="flex justify-between text-sm">
+                  <span class="text-muted-foreground">{{ t('admin.versions.createForm.previewCustomDownloadUrl') }}</span>
+                  <span class="truncate max-w-[120px]">{{ formData.custom_download_url || t('admin.versions.createForm.useDefault') }}</span>
+                </div>
               </div>
 
               <div class="border-t pt-4 mt-4">

frontend/src/plugins/i18n/en.json

@@ -1499,6 +1499,11 @@
         "previewUpdateType": "Update Type",
         "previewUpdateMethod": "Update Method",
         "previewAutoUpdate": "Auto Update",
+        "customDownloadUrl": "Custom Download URL",
+        "customDownloadUrlDesc": "Set a custom download URL, or use the platform default if not set",
+        "customDownloadUrlPlaceholder": "e.g., https://your-cdn.com/download/app.zip",
+        "previewCustomDownloadUrl": "Download URL",
+        "useDefault": "Use Default",
         "changelogPreview": "Changelog Preview",
         "noChangelog": "No changelog",
         "notUploaded": "Not uploaded",

frontend/src/plugins/i18n/zh.json

@@ -1477,6 +1477,11 @@
         "previewUpdateType": "更新类型",
         "previewUpdateMethod": "更新方式",
         "previewAutoUpdate": "自动更新",
+        "customDownloadUrl": "自定义下载地址",
+        "customDownloadUrlDesc": "设置自定义下载地址，不设置则使用平台默认地址",
+        "customDownloadUrlPlaceholder": "例如: https://your-cdn.com/download/app.zip",
+        "previewCustomDownloadUrl": "下载地址",
+        "useDefault": "使用默认地址",
         "changelogPreview": "更新日志预览",
         "noChangelog": "暂无更新日志",
         "notUploaded": "未上传",