feat: custom CDN for GitHub storage (#172) (#174)

Co-authored-by: Innei <tukon479@gmail.com>

be/apps/core/src/locales/ui-schema/en.ts

@@ -457,6 +457,12 @@ const enUiSchema = {
             description: 'Optional path within the repository to limit syncing.',
             placeholder: 'public/photos',
           },
+          'custom-domain': {
+            label: 'Custom CDN domain',
+            description: 'CDN or proxy domain used when generating public URLs.',
+            placeholder: 'cdn.jsdelivr.net/gh/owner/repo@branch',
+            helper: 'Leave empty to keep raw.githubusercontent.com URLs.',
+          },
           'use-raw': {
             label: 'Use raw URL',
             description: 'Use raw.githubusercontent.com when generating public URLs.',

be/apps/core/src/locales/ui-schema/zh-CN.ts

@@ -451,6 +451,12 @@ const zhCnUiSchema = {
             description: '可选，限制同步的仓库路径。',
             placeholder: 'public/photos（可选）',
           },
+          'custom-domain': {
+            label: '自定义 CDN 域名',
+            description: '用于生成公开链接的 CDN 或代理域名。',
+            placeholder: 'cdn.jsdelivr.net/gh/owner/repo@branch（示例）',
+            helper: '留空则继续使用 raw.githubusercontent.com。',
+          },
           'use-raw': {
             label: '使用 raw 链接',
             description: '生成公开链接时使用 raw.githubusercontent.com。',

be/apps/core/src/modules/configuration/storage-setting/storage-provider.ui-schema.ts

@@ -135,6 +135,13 @@ const STORAGE_PROVIDER_FIELD_CONFIG: Record<StorageProviderType, readonly Storag
       placeholderKey: 'storage.providers.fields.github.path.placeholder',
       descriptionKey: 'storage.providers.fields.github.path.description',
     },
+    {
+      key: 'customDomain',
+      labelKey: 'storage.providers.fields.github.custom-domain.label',
+      placeholderKey: 'storage.providers.fields.github.custom-domain.placeholder',
+      descriptionKey: 'storage.providers.fields.github.custom-domain.description',
+      helperKey: 'storage.providers.fields.github.custom-domain.helper',
+    },
     {
       key: 'useRawUrl',
       labelKey: 'storage.providers.fields.github.use-raw.label',

be/apps/core/src/modules/content/photo/storage/photo-storage.service.ts

@@ -191,6 +191,8 @@ export class PhotoStorageService {
         if (pathValue) result.path = pathValue
         const useRawUrl = parseBoolean(config.useRawUrl)
         if (typeof useRawUrl === 'boolean') result.useRawUrl = useRawUrl
+        const customDomain = normalizeStringToUndefined(config.customDomain)
+        if (customDomain) result.customDomain = customDomain
 
         return result
       }

be/apps/core/src/modules/infrastructure/data-sync/data-sync.dto.ts

@@ -46,6 +46,7 @@ const githubConfigSchema = z.object({
   branch: z.string().optional(),
   token: z.string().optional(),
   path: z.string().optional(),
+  customDomain: z.string().optional(),
   useRawUrl: z.boolean().optional(),
 })