feat: add image management functionality

- Implemented image folder repository with CRUD operations.
- Added image reference repository for managing image references to articles.
- Created image repository for handling image assets, including listing, inserting, updating, and deleting images.
- Introduced image usage repository to track storage usage and quotas for tenants.
- Added SQL queries for image assets, folders, references, and usage.
- Developed image handler for HTTP endpoints to manage images and folders.
- Created database migration scripts for image-related tables and structures.

packages/shared-types/src/index.ts

@@ -256,6 +256,7 @@ export interface ArticleDetail {
   generation_mode: string | null;
   platforms: string[];
   cover_asset_url: string | null;
+  cover_image_asset_id: number | null;
   generate_status: string;
   publish_status: string;
   title: string | null;
@@ -278,6 +279,66 @@ export interface UpdateArticleRequest {
   markdown_content: string;
   platforms?: string[];
   cover_asset_url?: string | null;
+  referenced_image_asset_ids?: number[];
+  cover_image_asset_id?: number | null;
+}
+
+export interface ImageFolder {
+  id: number;
+  name: string;
+  image_count: number;
+  created_at: string;
+}
+
+export interface ImageAssetItem {
+  id: number;
+  folder_id: number | null;
+  name: string;
+  url: string;
+  size_bytes: number;
+  created_at: string;
+}
+
+export interface ImageAssetListResponse {
+  items: ImageAssetItem[];
+  total: number;
+}
+
+export interface ImageUploadResponse {
+  id: number;
+  url: string;
+  name: string;
+  size_bytes: number;
+  reused?: boolean;
+}
+
+export interface ImageReferenceArticleBrief {
+  article_id: number;
+  title: string;
+  scopes: string[];
+}
+
+export interface ImageReferenceDetail {
+  total: number;
+  article_body: number;
+  article_cover: number;
+  articles: ImageReferenceArticleBrief[];
+}
+
+export interface FolderDeletePreview {
+  image_count: number;
+  referenced_articles: ImageReferenceArticleBrief[];
+}
+
+export interface ImageStorageUsage {
+  used_bytes: number;
+  quota_bytes: number;
+  used_pct: number;
+}
+
+export interface ImageUpdateRequest {
+  name?: string;
+  folder_id?: number | null;
 }
 
 export interface ArticleImageUploadResponse {