feat(web): add oRPC contracts and service hooks for app asset API

- Add TypeScript types for app asset management (types/app-asset.ts)
- Add oRPC contract definitions with nested router pattern (contract/console/app-asset.ts)
- Add React Query hooks for all asset operations (service/use-app-asset.ts)
- Integrate app asset contracts into console router

Endpoints covered: tree, createFolder, createFile, getFileContent,
updateFileContent, deleteNode, renameNode, moveNode, reorderNode, publish

web/types/app-asset.ts

@@ -0,0 +1,149 @@
+/**
+ * App Asset Types
+ *
+ * Types for app asset management API - file tree operations,
+ * file content management, and asset publishing.
+ */
+
+/**
+ * Node type enumeration for asset tree nodes
+ */
+export type AssetNodeType = 'file' | 'folder'
+
+/**
+ * Asset node representation (flat storage format)
+ * Used in responses for create, update, rename, move, reorder operations
+ */
+export type AppAssetNode = {
+  /** Unique identifier (UUID) */
+  id: string
+  /** Node type: file or folder */
+  node_type: AssetNodeType
+  /** Node name (filename or folder name) */
+  name: string
+  /** Parent folder ID, null for root level */
+  parent_id: string | null
+  /** Sort order within parent folder (0-based) */
+  order: number
+  /** File extension without dot, empty for folders */
+  extension: string
+  /** File size in bytes, 0 for folders */
+  size: number
+  /** SHA-256 checksum of file content, empty for folders */
+  checksum: string
+}
+
+/**
+ * Asset tree view node (nested format with computed path)
+ * Used in tree response with hierarchical structure
+ */
+export type AppAssetTreeView = {
+  /** Unique identifier (UUID) */
+  id: string
+  /** Node type: file or folder */
+  node_type: AssetNodeType
+  /** Node name */
+  name: string
+  /** Full path from root, e.g. '/folder/file.txt' */
+  path: string
+  /** File extension without dot */
+  extension: string
+  /** File size in bytes */
+  size: number
+  /** SHA-256 checksum */
+  checksum: string
+  /** Child nodes (for folders) */
+  children: AppAssetTreeView[]
+}
+
+/**
+ * Asset tree response (GET /apps/{app_id}/assets/tree)
+ */
+export type AppAssetTreeResponse = {
+  children: AppAssetTreeView[]
+}
+
+/**
+ * File content response (GET /apps/{app_id}/assets/files/{node_id})
+ */
+export type AppAssetFileContentResponse = {
+  content: string
+}
+
+/**
+ * Delete node response (DELETE /apps/{app_id}/assets/nodes/{node_id})
+ */
+export type AppAssetDeleteResponse = {
+  result: 'success'
+}
+
+/**
+ * Published asset tree structure (flat node list)
+ */
+export type AppAssetFileTree = {
+  nodes: AppAssetNode[]
+}
+
+/**
+ * Publish response (POST /apps/{app_id}/assets/publish)
+ */
+export type AppAssetPublishResponse = {
+  /** Published version ID */
+  id: string
+  /** Version timestamp */
+  version: string
+  /** Asset tree snapshot */
+  asset_tree: AppAssetFileTree
+}
+
+/**
+ * Request payload for creating a folder
+ */
+export type CreateFolderPayload = {
+  /** Folder name (1-255 characters) */
+  name: string
+  /** Parent folder ID, null/undefined for root */
+  parent_id?: string | null
+}
+
+/**
+ * Request payload for creating a file (form data)
+ */
+export type CreateFilePayload = {
+  /** File name (1-255 characters) */
+  name: string
+  /** Parent folder ID, empty or undefined for root */
+  parent_id?: string | null
+}
+
+/**
+ * Request payload for updating file content (JSON)
+ */
+export type UpdateFileContentPayload = {
+  /** New file content (UTF-8) */
+  content: string
+}
+
+/**
+ * Request payload for renaming a node
+ */
+export type RenameNodePayload = {
+  /** New name (1-255 characters) */
+  name: string
+}
+
+/**
+ * Request payload for moving a node
+ */
+export type MoveNodePayload = {
+  /** Target parent folder ID, null for root */
+  parent_id: string | null
+}
+
+/**
+ * Request payload for reordering a node
+ */
+export type ReorderNodePayload = {
+  /** Place after this node ID, null for first position */
+  after_node_id: string | null
+}